Total: $0.00
The SOC reading may not accurately reflect the actual charge level. Based on your voltage readings, 13.93V typically indicates a fully charged battery. I recommend completely discharging the batteries and then recharging them using your solar and shoreline setup. This process can help recalibrate the SOC on the Bluetooth app, providing a more accurate reading.
Please try the attaching tips to resolve the Bluetooth connection issue.
1. Check Other Devices: Ensure that no other devices are currently connected to the battery's Bluetooth, as this can prevent your phone from connecting.
2. Bluetooth Version: Verify that your Android phone supports Bluetooth version 5.0 or higher, as lower versions may not be compatible.
3. Distance: Make sure that your phone is within a reasonable distance from the battery to maintain a stable connection.
4. App Version: Ensure that you have the latest version of the LiTime App installed on your phone.
5. Reset Bluetooth Module: Try resetting the Bluetooth module by turning off the battery for a few minutes and then turning it back on.
Fast discharge
1.Main reason: excessive self-discharge of the battery
2.Judgment criteria:
Battery resting voltage change - test the battery after fully charged 30min, 1h, 2h, 6h, 12h, 24h battery resting voltage change, if ≤ 0.05V, then the battery is normal, on the contrary, the battery is abnormal.
3.Solution
a. If the batteries are discharged quickly after being connected in series, it is necessary to confirm the static voltage of individual batteries, and it is recommended to re-equalize all the batteries after discharging and then use them in series.
b. Fast discharging after parallel connection - confirm battery equalization - dismantle the parallel connection between batteries and test the standstill voltage of individual batteries. It is recommended to equalize the individual batteries after discharging and recharge them after equalization, if the protected batteries need to be activated after equalization.
c. Battery use time, purchase time to confirm - it is recommended to buy a month or less of the battery for mixed use, the time interval between battery mixing can easily damage the battery, or the system capacity is not enough.
d. Short running time, load type and power confirmation-Calculate the energy needed to carry the load, and suggest increasing the battery capacity to meet the requirements of carrying the load.
Insufficient capacity
Option 1: Whether the voltage judgment, lithium batteries with voltage measurement SOC is not measured, unlike lead-acid batteries SOC and voltage are in a linear relationship, suggests that the customer first give the battery a full charge to test the battery's static voltage, and then do a complete discharge to assess the actual capacity of the battery.
Option 2: Monitor display situation, it is recommended that the customer use the monitor with a shunt, preferably the recommended monitor, and correct the SOC of the charger before testing.
Option 3: Capacity Calculation Method, we suggest that customers give the battery a complete charge/discharge to measure the capacity, calculate the battery discharge time, and load power.
Note: Inverter and other equipment have a conversion efficiency (about 85%), to be converted to equivalent DC power and then calculated; in the conversion efficiency range of loss is normal.
-Main cause: Battery over-discharge, BMS protection
-Solution: Connect the charger to determine if the battery can be charged normally.
1. Connect the charger and judge whether the battery can be charged normally.
If the battery can be charged normally, it means the battery has not entered the protection state;
If the battery cannot be charged normally, measure the battery's open-circuit voltage to judge whether the BMS protection has been triggered.
2、Measure the battery terminal voltage
Voltage ≥10V: the battery has not triggered the protection
Voltage <10V, the battery has triggered the protection and needs to be activated.
-Battery activation program
1. Charger activation: Use a Li-ion charger with a 0V activation function.
2、MPPT activation: make sure the MPPT can be in the charging state, and the connection is not disconnected.
3、Solar panel activation: directly connect the solar panel with the battery to activate, no need to connect the MPPT in the middle, and measure the battery's resting voltage recovery after half an hour.
-Possible reasons
1. Long-term non-use leads to self-discharge, resulting in a natural drop in voltage
-Solution: Charge to 50-60% before storage, replenish power regularly (every three months)
2. Loose connection terminals, corrosion, and wire oxidation leading to low measurement voltage
-Solution: Check whether the terminal screws are firm; clean the connection point, replace the aging wire; multimeter to measure the voltage at different positions to confirm whether it is a contact problem.
High Charging Voltage:
1. Main reason:
a. Solar Charging Protection Mechanism
When the battery is full, the BMS (Battery Management System) will automatically activate the charging protection and disconnect the charging circuit to prevent overcharging. At this time the system will turn to discharge mode to maintain battery health.
b. Voltage Rise
The charger is still outputting current, but since the battery is full, the charge cannot enter the battery, resulting in a buildup of charge and a rise in voltage at the charging end.
2. Explanation:
The voltage of the battery itself remains unchanged because it is full and disconnected and is not affected by the charging terminal voltage. This condition is a normal protection mechanism for a fully charged battery and is not a battery failure. The battery can still be used normally and the cycle can be resumed by charging it again after it is full.
The Voltage of the Battery Is High:
1. Main reason: the measurement problem just after charging, after charging, there may be residual charge on the terminals, resulting in the measured voltage is higher than the actual voltage of the battery. The data at this time does not reflect the real state of the battery.
2. Solution: Correct measurement method, disconnect all connections (including charger, load, etc.); leave it for more than 30 minutes to let the buildup of charge naturally release. Re-measurement, this time to get the real open circuit voltage of the battery.
Full charge state reference value
When the battery is fully charged, the open-circuit voltage should be ≥ 13.33V (12V lithium battery, 24/36/48 needs *2/*3*4)
1. Main Causes: Core Differences
Solution:
a. install an equalizer to do equalization
b. regular two-month charging and discharging equalization
2. Possible Causes: Load Current Fluctuations
Solution: Use the load within specifications
3. Other Causes: The battery's internal resistance becomes large
Solution: parallel connection of a number of smaller-capacity but healthy batteries to ease the instantaneous load.
4. Other Causes: The wrong voltage detection
Solution: use multi-point measurement calibration, replace a more accurate measurement instrument (such as a multimeter, data logger)
1. Cause: Battery is full and BMS cuts off the charging circuit
When the battery is fully charged, the BMS will close the charging channel, resulting in a buildup of charge from the charger on the battery terminals, but the actual battery voltage does not rise.
Solution:
Disconnect the charger and let the battery sit for 30 minutes, the voltage will naturally drop back down.
Reduce the float voltage to 13.5V (12V system) to minimize voltage fluctuations.
2. Cause: High charger voltage or wrong MPPT parameter
High output voltage (e.g. more than 15V) of the charger (especially solar MPPT) may trigger BMS protection and lead to voltage spikes.
Solution:
Adjust the MPPT parameters: Select the dedicated LiFePO4 mode and set the charging voltage to 14.2~14.6V.
Add a circuit breaker: Install a manual switch between the MPPT and the battery, and disconnect the charging after full.
3. Cause: Excessive voltage difference between cells (poor equalization)
When the voltage of single cells is not consistent, BMS may misjudge the full charge state, resulting in an abnormal increase of the overall voltage.
Solution:
Manual equalization of cells: Discharge the battery until it is switched off, then fill it up with low current (5%A).
If the problem persists, replace the battery (the cell may be damaged).
4. Cause: Faulty charger or connection problem
Abnormal output voltage of the charger or poor contact of the terminals may lead to high voltage.
Solution:
Replace the charger: Use a special LiFePO4 charger (output 14.2~14.6V).
Check the wiring: Make sure the terminals are tight and not loose or oxidized.
A. Main Reason:
The battery is over-discharged and fully depleted.
Solutions:
1.Recharge using a lithium-compatible charger.
2.If there is no response, use a smart charger with 0V activation or try an activation method.
B. Possible Causes & Fixes:
1. Excessive load or sudden current surge (e.g., air conditioner, induction cooker) → Add slow-start equipment, install a soft-start module, or parallel more batteries to increase discharge capacity.
2. High internal resistance or low voltage cells → Perform battery equalization.
3. Poor contact or loose connections (loose/rusted terminals, cables, connectors) → Inspect all connection points, plugs, fuses, and terminals; clean and tighten them.
Possible Causes:
1. BMS protection triggered – When the battery is fully charged, the BMS cuts off charging, causing excess charge from the charger to accumulate at the terminals, creating voltage spikes.
2. Charger mismatch or improper settings – Using a non-LiFePO4 charger or incorrect parameters can lead to overcharging.
Solutions:
1. Adjust charging parameters and set the float voltage to 13.5V.
2. Always use a dedicated LiFePO4 charger (14.2V–14.6V) or set MPPT to Li mode.
3. Install a circuit breaker between the MPPT and the battery to prevent charge buildup.
4. Maintain regular discharge cycles and avoid keeping the battery at 100% state of charge for prolonged periods.
Reason 1: Check that the charging device matches
Solution:
1. Must use a LiFePO4 dedicated charger or a charger that supports Li-ion mode (voltage range 14.2V~14.6V). The lead-acid charger may not be able to charge properly and even trigger the BMS protection.
2. MPPT/DCDC adjust to LiFePO4 mode (not lead-acid mode) or change to user mode.
Reason 2: BMS protection or cell imbalance
Solution:
1. Connect ＞2A load to discharge, then recharge.
2. Long resting time (24 hours) or use an equalizer to adjust.
Reason 3: Charging environment problem
Solution:
Solar charging needs to ensure there is enough light and PV power matching.
Reason 4: Charging circuit failure
Solution:
1. Check whether the terminals are loose, oxidized, or have poor contact.
2. Measure whether the battery voltage matches the charger output during charging.
Recommended activation steps:
1. Change the special charger (14.2~14.6V).
2. Discharge and then charge (load > 2A).
3. Let it rest for 24 hours and then re-test the voltage.
1. Main Reason:
The battery voltage reaches or exceeds the set full-charge voltage value, automatically cuts off the charging current to prevent overcharging.
2. Possible Reasons:
a. The use of mismatched chargers and lithium battery charging, the charging current is too large, overcurrent protection cutting off charging.
b. The charger output voltage is not stable, resulting in frequent charging cutoff.
c. the charger's power cord or output line if the contact is poor or there is a broken circuit, will also lead to not normal charging, charging frequently cut off.
3. Solution:
a. We suggest customers to buy special LiFePO4 charger; or choose the charger with Li mode, the charging range is 14.2-14.6V (12V lithium batteries), the charging voltage of 24V/36V/48V lithium batteries is 14.2-14.6V*2/*3/*4.
b. Before charging, check the charging line to see if it is not in good contact or if there is a broken circuit, and timely repair or replace the damaged line.
Main Reason:
Battery over-discharge, or BMS protection triggered by high/low temperature.
Possible Causes:
a. Short circuit protection – Positive and negative terminals short-circuited, discharge cut off.
b. Loose or broken connections – Poor contact between battery and load, causing interruptions.
Solutions:
1. Check for over-discharge
a. Confirm if the battery has stopped discharging.
b. Use a multimeter to measure open-circuit voltage (no load).
c. If voltage fluctuates around 10V → recharge; if voltage rises, the battery is normal.
d. If under a non-inductive load ≤ rated discharge current the voltage still drops sharply (e.g. 13.33V → 10V), the battery may be abnormal.
2. Check for abnormal temperature
a. If the case temperature exceeds the limit (Charge: 0–50°C / Discharge: –20–60°C), BMS triggers temperature protection.
b. Let the battery return to a safe temperature range before reusing.
3. Check the load
a. Disconnect the load and measure no-load voltage.
b. If no-load voltage is normal, ensure the load’s rated power ≤ battery capacity, then reconnect and observe.
Notes:
1. Avoid directly starting inductive loads (motors, solenoids, etc.); add a soft-start circuit.
2. High inrush current from inductive loads may cause sudden voltage drops.
3. When inductive loads are cut off, reverse potential shock may generate voltage spikes, triggering BMS protection.
Root cause: BMS protection status or failure.
Cause: battery voltage <10V triggers BMS protection, charging circuit is cut off.
Solution:
1. Use a dedicated LiFePO4 charger that supports 0V activation. 2.
2. Connect the solar panel directly to the battery to activate (or MPPT)
If the voltage is <10V, connect the solar panel for 30 minutes, and then measure the resting voltage >12V; normal charging can be resumed, or the charging equipment does not match.
Request additional information:
1. Current resting voltage of the battery (measured with all devices disconnected).
2. Screenshot of the charger model and parameters.
3. Whether the charging indicator is observed to be flashing abnormally.
4. Record of the ambient temperature of the battery storage environment.
Root Cause: BMS Protection Trigger
Cause: Battery voltage jumps between 10V-13.33V when discharging, BMS repeatedly enters/exits the protection state.
Solution:
1. If the load is ≤ the nominal power of the battery, change to another small load to test the battery discharge performance.
2. If the load is a motor and other high-current loads of inductive equipment, need to add a buffer starter.
Possible causes: Loose terminals lead to excessive contact resistance
Solution:
1. Clean the contact surface and use a torque wrench to tighten it (recommended 12-8N-m).
2. Apply an antioxidant to prevent corrosion.
Information to be provided by the customer:
1. Frequency of intermittent discharging (e.g., how many times per hour).
2. Specification of the loaded equipment (power/type).
3. Whether to use a battery pack in parallel and the SN number of the battery.
Whether BMS is protected or not, determined by voltage (10V standard):
≥10V: BMS is not protected; <10V: BMS is protected; [Conditions for judging 12V battery, 24V/36V/48V battery need corresponding (10V standard *2/*3/*4)]
Root Cause: Battery is over-discharged → BMS entered protection. Voltage falls below the minimum threshold set by the protection board, causing no power output.
Possible Causes:
1. Charging abnormalities, overcharge, overcurrent, etc., which may lead to damage to the internal structure of the battery using a mismatched charger or incorrect charging method, thus failing to activate.
2. The use of a poor environment, if long-term storage is in a high-temperature environment, the performance of the battery may be affected, resulting in inactivation.
Solution:
1. Charger activation – Use a 0V LiFePO4 charger. Chargers without 0V activation cannot activate. (Note: most lead-acid chargers cannot activate lithium batteries.)
2. MPPT activation – Ensure MPPT remains in charging state and the connection is stable to activate the battery.
3. Solar panel activation – Connect the solar panel directly to the battery (no MPPT in between). After ~30 minutes, check resting voltage; if recovered, charging can resume.
Possible Causes:
1. Internal cells have become loose.
2. BMS is not firmly fixed.
3. Battery expansion or internal pressure change, causing structural deformation and movement of components.
Recommended Actions:
1. Record a video and audio while shaking the battery to capture the abnormal noise clearly.
2. Take photos of the battery’s appearance (including deformation, labels, and serial number).
3. Provide the purchase order number, usage time, and whether the battery has been dropped or disassembled.
4. Share the logistics waybill photo for further investigation.
Note:
If it is confirmed that only the plastic corner of the fixing bracket has fallen off, this does not affect the safety or normal use of the battery.
1. Battery voltage is too low
Cause: If voltage <5V, the battery cannot turn on. If <10V, it may be in BMS protection.
Solution:
a. Use a LiFePO4 charger (14.2–14.6V) or 0V activation charger, charge for 30 minutes with the battery alone (no load).
b. If resting voltage is still <10V, connect a solar panel directly to the battery (without MPPT) to activate.
2. Mismatched or incorrectly wired charger
Cause: Lead-acid charger, reverse wiring, or parallel loads preventing activation.
Solution:
a. Check the charger is for LiFePO4.
b. Ensure positive/negative polarity is correct.
c. Disconnect all loads and connect charger to the battery only for testing.
3. Bluetooth connection occupied or interfered with
Cause: Signal occupied by other devices; phone Bluetooth version <5.0; or distance too far.
Solution:
a. Disconnect other Bluetooth devices.
b. Use a phone that supports Bluetooth 5.0+.
c. Download and install the latest LiTime App.
Main Reason:
The bulge is caused by the deformation or air tightness of the EVA padding inside the battery case. This does not affect performance.
Suggested Check (12V / 12.8V battery):
1. Fully charge the battery.
2. Disconnect the charger and load for 30 minutes, then measure the static voltage. If ≥13.33V, the battery is fully charged.
3. Connect the battery to a small DC load (e.g., fan). If the load works normally, the battery is in good condition.
Note:
For 24V, 36V, and 48V lithium batteries, apply the same method but adjust the reference voltage: ≥13.33V *2/*3/*4.
1. Emergency Measures:
a. Power off immediately – Disconnect all connections.
b. Drain water – Turn the battery upside down to let water out, use cotton swabs to dry the interfaces.
c. Air dry naturally – Place in a ventilated, cool area for at least 3 days (no heating or direct sunlight).
2. Availability Check after Drying:
a. Appearance inspection – Provide photos of the battery’s exterior.
b. Voltage detection:
If <10V → BMS is locked; use a special charger with activation mode for 4 hours.
If ≥13V → Perform a charge/discharge test to confirm performance.
Root Cause:
Excessive internal resistance in the charging circuit caused continuous heating, leading to terminal melting.
Secondary Causes:
Loose terminals: If terminals are not tightened properly. Sign: the spring spacer should be fully pressed flat.
Additional Information Needed:
To analyze further, please provide:
Handling measures:
1. Immediately disconnect the power to prevent poor contact caused by overheating accidents.
2. Check the degree of damage, take a high-resolution photo of the collapsed part (including the state of the spring gasket) and measure the remaining thickness of the terminal.
Please kindly note that to connect in series or /and parallel, batteries should meet the following conditions:
a. identical batteries with the same battery capacity (Ah) and BMS (/A);
b. from the same brand (as lithium batteries from different brands have their special BMS);
C. purchased in near time (within one month).
Generally speaking, opting for a single battery eliminates the need for wiring multiple batteries in connection and the periodic voltage balancing that comes with it.
As you are storing the battery for a long period of time, here are some suggestions for long-term storage for your reference.
1.Temperature: A temperature between 10°C to 35°C / 50°F to 95°F is ideal for long-term storage. Store in a fireproof container and away from children.
2. Capacity: For a longer-lasting product, it is best to store your battery at a 50% charge level and recharge every three months if it is not going to be used for a long time.
We offer a 5-year, prorated warranty for our new battery product, which will be in effect from the date of purchase. During the five-year warranty period, we will endeavor to provide our customers with technical assistance and solutions to any product performance problems. For more information about the warranty, you can directly contact LiTime Customer Support.
Our Like-New batteries were returned by customers due to personal reasons, such as improper size or incompatibility with their devices. It is confirmed that there is no problem with the battery, only a little scratch on the battery's surface.
A short period of time will not affect the battery, but pay attention to the mounting position when you use the battery afterwards.
Possible Causes:
Logistics transportation collision
Solution:
Assist in providing the following information:
1. the specific location of the crack, quantity, photos/videos;
2. the use of the environment (temperature, whether it is subjected to external shocks);
3. the order number, the battery serial number, the use of the battery (resting voltage, charging equipment, load information);
4. whether it is accompanied by liquid leakage, heat or other abnormalities.
Solution:
Assist with the following information:
1. Order number: Provide the order number so we can locate and verify the information.
2. Product picture: Take a clear picture of the battery, especially the part showing wear or defects.
3. Logistics face sheet picture.
The accessory bolts are usually placed in a slot within the foam packaging (above the battery). Please check this area carefully.
If you still cannot find them, please contact us and we will provide a solution right away.
How to Check:
Use a smartphone camera to detect. Replace the charger to test charging performance.
Further investigation requires a video of the noise to determine if it exceeds 60 decibels (within a 1m open space range).
Possible Causes:
1. Vibration from internal components (e.g., inductors, transformers).
2. Abnormal cooling fan operation due to aging, loosening, or dust.
Solutions:
1. Clean the charger’s cooling vents and ensure the fan is not jammed.
2. Secure loose components (e.g., add a silicone pad for vibration damping).
3. If the noise persists, replace the charger.
When the charger is not working, check the indicator light status:
1. Red light flashing → Battery overvoltage/undervoltage protection.
Solution: Connect a multimeter to measure the battery voltage while charging. Improvement: Discharge the battery first, then recharge using a lower current charger, and adjust the float voltage to 13.5V.
2. Red and green lights flashing alternately → BMS protection state.
Solution: Discharge the battery first, then recharge to activate it.
3. Only green light on, but not charging → Charging recognition fault.
Solution: Replace with a compatible charger.
Main Cause 1: Charger or mode mismatch
1. Explanation: Non-LiFePO4 chargers, or selecting the wrong mode (e.g. lead-acid), will not provide the correct parameters.
2. Solutions: Use a dedicated LiFePO4 charger (14.2–14.6V). Set MPPT/DCDC to LiFePO4 mode (or user-defined with correct parameters).
Main Cause 2: BMS protection activation
1. Explanation: After full charge, the BMS closes charging to protect cells, causing ~0.7V drop. Voltage spikes may repeatedly trigger protection.
2. Solutions: Discharge with a >2A load, then recharge to reset BMS. Reduce float voltage to 13.5V × N (N = number of packs). Adjust charger/MPPT parameters.
Main Cause 3: Insufficient charging time or current
1. Explanation: A 100Ah battery needs ~10h at 10A to fully charge. Insufficient current (e.g. weak solar input) leads to incomplete charging.
2. Solutions: Extend charging time based on capacity & current (100Ah ÷ 10A = 10h). Ensure PV panels provide >12V output and adequate power; upgrade panel if necessary.
Main Cause 4: Battery or connection issue
1. Explanation: If resting voltage <10V, BMS protection blocks charging. Loose/oxidized terminals or undersized cables reduce charging efficiency.
2. Solutions: Use a 0V activation charger or connect PV panel directly to activate. Inspect terminals: clean oxidation, tighten firmly (spring washers flattened). Use ≥35mm² copper cables to reduce voltage drop. Cross-test with another charger/battery to identify faulty equipment.
Cause 1: Unstable current at the input end.
Cause 2: Normal operation of the charger may produce noise, including the sound of the cooling fan starting and the slight clicking sound when the relay switches.
Solutions:
If abnormal noise occurs, troubleshooting tests are required:
1. Test with a different socket (to rule out power grid interference).
2. Power on without a load (without connecting the battery) and observe if there is still a strange noise.
3. Gently shake the charger to check if there is any loose parts.
Causes and Solutions:
1. The charger voltage is too low. For a 12V system, the lithium battery charging voltage should be between 14.2-14.6V.
2. Insufficient charging current. Use a higher power charger or increase the current setting.
We suggest you follow these steps:
1. Disconnect all charging devices, let it sit for 30 minutes, and then restart the DC-DC.
2. Use a multimeter to check the input voltage:
If the voltage is <12V and the red light is flashing, it is recommended to replace the DC-DC.
If the voltage is normal but still abnormal, please check the main battery status.
Quick power recovery:
Charge the main battery to 13.8V through the car ignition.
If the voltage is repeatedly too low, it is recommended to upgrade the generator to an output of more than 100A.
Solutions:
1. Connect the D+ port to the vehicle's ignition switch (key-controlled) or the IN+ port (for continuous power supply).
2. Install a circuit breaker to protect the main battery (select a rated current of 1.3 times the system current).
If further assistance is needed, please provide:
1. DC-DC model.
2. Screenshot of the actual voltage of the main battery.
3. Photos of the wiring during the abnormality.
Possible causes are as follows:
1. Insufficient input voltage.
Solution:
Start the engine to charge the main battery to above 13.8V.
Replace the generator with an output current of ≥100A.
2. Wiring connection issues.
Solution:
Check the voltage of the D+ port. If it is less than 12.5V, connect the ACC line or directly connect to the IN+ port.
Clean and tighten all wiring terminals and replace damaged cables.
3. Abnormal battery status.
Solution:
Disconnect the load and discharge for 30 minutes, then recharge.
Replace with a low-current charger to avoid voltage fluctuations.
4. Device failure or incorrect mode.
Solution:
Long press the Crossover key for 3 seconds to exit the reverse charging mode.
Test with another charger.
Possible Cause:
Solutions:
Preventive Measures:
For troubleshooting, please provide:
Cause 1: Insufficient input voltage of the starting battery.
Solution: Use a multimeter to check if the input voltage is within the charger's input voltage range of 12-16V; it is recommended to use it within this voltage range.
Cause 2: Abnormal connection at the input end, the wrong battery is connected.
Solution: Investigate the voltage of the input signal.
1. For DC-DC with MPPT function, is the ACC line connected? The connection of the ACC line determines the input voltage range of the DC-DC charger.
2. Can voltage be measured at the input end? What is the measured voltage? Is the voltage within the range of the DC-DC charger?
Cause 3: Abnormality at the charger's output end.
Solution: Measure the voltage at the output end (the end connected to the house battery); whether it outputs the correct charging voltage (such as in the range of 14.2V to 14.6V).
Cause 4: Abnormality with the house battery itself.
Solution:
1. Disconnect all loads from the house battery and let it sit for more than 30 minutes.
2. Measure the voltage of the battery after it has been sitting to confirm whether it is truly not fully charged.
3. Is the battery abnormal? (For example, if the voltage is abnormally high or low, indicating BMS protection)
Cause 5: The battery is being charged and discharged at the same time.
Solution:
Disconnect high-power loads during charging, only connect the battery, and observe whether the charging voltage and current return to normal.
Possible Causes & Solutions:
1. Charger detection issue
Cause: After completing charging, the charger fails to detect battery discharge.
Solution: Check the recharging voltage setting of the charger, and try reconnecting by powering off and on.
2. Unstable input voltage
Cause: The Input voltage fluctuates abnormally.
Solution:
a. Measure the input voltage of the starting battery.
b. Ensure the starting battery remains ≥12.5V after charging.
c. If the input end has ACC control, confirm that the ACC signal is not interrupted.
3. Input signal issues
Cause: Incorrect or unstable ACC control signal.
Solution:
a. Check the ACC control line is connected correctly.
b. Confirm a stable DC voltage is present at the input end.
c. Ensure the input voltage is within the DC-DC's allowable range.
4. Output or battery end abnormality
Cause: Fault at the output stage or battery side.
Solution:
a. Output check: Measure output voltage, confirm it is within the normal charging range. b. Battery check: Disconnect the battery, let it rest for 30 minutes, then measure resting voltage to verify charge status. Avoid heavy loads during charging (recommend disconnecting high-power loads).
Cause 1: Fluctuations or instability in the input power supply.
Solution: Check if the input voltage from the mains power/ generator/ solar is stable and within the specified range.
Cause 2: Abnormalities at the battery end, with voltage being too low or poor contact.
Solution: Measure the resting battery voltage:
For a 12V system, it should be ≥10.8V;
For a 24V system, it should be ≥21.6V;
For a 48V system, it should be ≥43.2V;
Check if the battery terminals, fuses, and wire connections are secure.
Cause 3: Fluctuations or instability in the PV input.
Solution:
1. Check the voltage and current fluctuations at the PV end;
2. Confirm whether there is shading, low light, or shadows causing power fluctuations;
3. It is recommended to use photovoltaic panels of the same brand/model to reduce mismatch in series and parallel connections.
Cause 4: The load is too large or changes drastically.
Solution:
1. Check if the installation location of the all-in-one machine is well-ventilated.
2. Avoid using it in direct sunlight or in a high-temperature enclosed space;
3. Regularly clean the fan and filter dust to maintain smooth heat dissipation.
4. Check the total power of the actual connected load to confirm whether it exceeds the rated power of the all-in-one machine.
5. Verify whether there are any impact loads (with a starting current of 5 to 10 times the rated).
Cause 5: Excessive heat dissipation or ambient temperature.
Solution:
1. Check if the installation location of the all-in-one machine is well-ventilated;
2. Avoid using it in direct sunlight or in a high-temperature enclosed space;
3. Regularly clean the fan and filter dust to maintain smooth heat dissipation.
Fault Code [01] Battery Undervoltage Protection
Fault Code [02] Battery Average Discharge Current Overcurrent
Fault Code [03] Battery Not Connected Warning
Fault Code [04] Battery Over-Discharge Protection
Fault Code [05] Battery Overcurrent Protection
Fault Code [06] Battery Overvoltage Protection
Fault Code [09] PV Input Overvoltage
Fault Code [13] Bypass Overload
Cause 1: Abnormal DC input voltage
Solution: Measure the voltage at the DC input terminal (confirm the actual value with a multimeter); compare it with the product specification sheet to see if it exceeds the allowable range. Adjust or replace the input device to ensure normal input voltage.
Cause 2: Load exceeds the power capacity
Solution: Confirm all connected loads and their rated power. The total power should not exceed 80%-90% of the rated power of the inverter/charger controller. If exceeded, the loads should be started in batches.
Cause 3: Abnormal PV input terminal
Solution: Measure whether the PV open-circuit voltage is within the allowable range and check if the photovoltaic panel wiring is reasonable.
Cause 4: Short circuit or abnormal surge at the load end
Solution: Disconnect all loads and start the all-in-one machine alone to see if it recovers. Provide a video or picture of the abnormal report.
Cause 1: BMS protection feedback difference
Cause 2: Different measurement points
Cause 3: Load or charging current interference
Cause 4: Voltage drop during high-current operation
Cause 5: Screen calibration error
Cause 6: Multimeter accuracy issue
Cause: Abnormal power connection
Solution:
1. Check if all terminal connections are secure.
2. Measure the battery input voltage of the inverter/charger.
Main Cause:
No power input, the inverter input terminal has no voltage, and there is no power supply.
Possible Causes:
1. The fuse is blown or the temporary protection is activated: The internal overcurrent or short-circuit protection circuit of the input terminal is disconnected.
2. The screen connection is loose or has poor contact.
3. The battery is not connected or has a low voltage.
Solutions:
1. Use a multimeter to measure the voltage at the battery input terminal to ensure normal input of 12V/24V/48V, etc.
2. Check that the input wiring is secure and there are no problems.
Cause 1: Insufficient DC power voltage supply for the inverter
Solution: Maintain an input voltage of 10.5-16.0V. If the load fluctuation is greater than 3V, charge the battery and retest the inverter startup.
Cause 2: There is a problem with the inverter's connection
Solution: Check if the battery is connected and whether the positive and negative poles are connected in reverse.
Cause 1: Abnormal power connection
Solution: The connection lines between the battery and the inverter are loose or have poor contact. Check and reconnect the power lines.
Cause 2: The battery voltage is below the inverter's startup threshold
Solution: Use a multimeter to measure the voltage. If necessary, charge the battery to ensure the voltage is within the normal operating range.
Cause 3: The main power switch of the inverter is not turned on, or the remote control is out of power or faulty
Solution: Check the position of the inverter switch to confirm that the remote control battery is powered and functioning properly.
Cause 4: The inverter has entered a protection state due to an abnormality or fault and has not automatically recovered
Solution: Press the reset button or power off and restart the inverter.
Cause 5: The total power of the connected load exceeds the inverter's rated output, causing startup failure or protective shutdown
Solution: Disconnect all loads and start the inverter only with the battery connected. Gradually reconnect the loads.
Cause 6: The working environment temperature is too high or too low, causing the inverter to start protection
Solution: Ensure that the inverter operates within the specified temperature range (e.g., 0℃~50℃) and avoid humid and extremely cold environments.
Suggested Actions:
1. Determine the alarm message corresponding to the alarm. Remove the load from the inverter to identify whether the alarm is due to a machine fault or a load issue.
2. Determine the time when the alarm occurred (new machine/in use).
3. Determine the type and power of the load (resistive/inductive).
4. Record a test video (including multimeter measurement).
Examples for a 12V 2000W US Standard Inverter:
Fault② Undervoltage Alert
Cause: The input voltage is below the minimum operating voltage required by the inverter (e.g., below 10.5V for a 12V system).
Solution: Check the battery charge. If the charge is insufficient, charge it immediately. Check if the battery connection wires are loose or too thin, and ensure the wire cross-sectional area is sufficient (e.g., each square millimeter can handle 6A of current). If the battery is normal but the voltage display is abnormal, it may be a voltage detection fault, and you need to contact after-sales service.
Fault③ Overvoltage Protection
Cause: The input voltage exceeds the upper limit of the inverter (e.g., above 16V for a 12V system), commonly seen when solar charging causes voltage accumulation.
Solution: Disconnect the charger and let the voltage drop after 30 minutes. Adjust the MPPT or charger's float voltage to 13.5V (for a 12V system).
Fault④ Undervoltage Protection
Cause: The battery voltage remains below the inverter's shutdown threshold (e.g., below 10V for a 12V system), and the BMS may have cut off the output.
Solution: Check if the battery is over-discharged. If the resting voltage is below 10V, charge it before use. Check if the load is too large. If it exceeds 80% of the inverter's rated power (for inductive loads, it should be even lower), reduce the load.
Fault⑥ Overload Protection
Cause: The load power exceeds the inverter's rated capacity (e.g., the starting current of inductive loads like microwave ovens can reach 3-5 times the rated value).
Solution: Remove some loads and prioritize disconnecting motor-type equipment (such as air conditioners, water pumps, etc.). Replace with a higher power inverter or use a soft-start inverter.
Fault⑦ Overtemperature Protection
Cause: Poor heat dissipation or high ambient temperature (e.g., above 50℃) triggers protection.
Solution: Ensure good ventilation for the inverter and keep it away from heat sources. Clean the dust from the cooling fan. If the fan is not rotating, it needs to be repaired.
Fault⑧ Output Short Circuit Protection
Cause: Short circuit in the output line or internal fault of the load.
Solution: Disconnect all loads and check each one for short circuits. Check if there is metal contact at the output terminals or if the wire is damaged.
Cause 1: The battery voltage is below the set protection threshold
Solution: Check if the battery input is below the minimum input voltage of the inverter.
Cause 2: Overload or sudden load change
Solution: Check the total power of the load. It is recommended to be ≤80% of the inverter's rated power. For inductive devices (such as air conditioners, pumps), use an inverter with a rated power 1.5 times larger.
Cause 3: Overtemperature protection
Solution: Ensure good ventilation and check if the fan is rotating normally. Use within the normal operating temperature range.
Cause 4: The Inverter is dead
Solution: Perform a complete power-off: Turn off the machine and disconnect the power for 5 minutes before powering it back on.
Cause 5: Loose plug terminals
Solution: Recheck the wiring to ensure a secure connection.
Suggested Actions:
1. Record the noise characteristics by audio or video.
2. Disconnect all loads and turn off the inverter.
3. Check for any burning smell or smoke.
Causes and Solutions:
1. Continuous humming sound: This is due to the high-frequency oscillation of the circuit or the working noise of the transformer. If it still exists when the inverter is unloaded, it is a normal phenomenon and no treatment is needed.
2. Intermittent fan rotation sound: The cooling system is activated (when power > 40%). As the temperature rises, the environment needs to be improved for better heat dissipation.
3. Metallic impact or friction sound: This is due to loose internal components. If the sound changes when the device is shaken, it needs to be stopped immediately.
4. High-frequency whistling sound: This is caused by the connection of inductive loads (such as motors), which will be particularly noticeable at startup. A soft-start device needs to be installed.
Cause: The output frequency is a fixed value of 50Hz or 60Hz and cannot be dynamically identified or switched.
Solutions:
1. Check the settings to ensure the inverter's frequency setting meets the requirements.
2. Try restarting the device.
3. Refer to the user manual to ensure all settings are correct.
Suggested Actions:
1. Immediately disconnect all power connections (disconnect the battery end first, then the load end).
2. Have a dry powder fire extinguisher on standby (do not use water to extinguish the fire).
3. Move flammable items to a distance of more than 3 meters.
Record the operating status when smoking occurs:
1. The power and type of the load
2. The battery voltage reading
3. The ambient temperature
Cause 1: The battery voltage is too low (<5V), and the device is not activated.
Solution: It needs to be charged separately to activate.
Cause 2: The Bluetooth pairing process is incorrect.
Solution: Delete the device record in the phone's Bluetooth list, and reconnect by scanning through the APP instead of pairing in the system settings.
Cause 3: Interference or too great a distance.
Solution: Use within an interference-free range.
Cause 4: Issues with the phone.
Solution: Ensure the APP has Bluetooth and location permissions, clear the phone's Bluetooth cache (especially for Android) and restart the phone.
Upgrade to the latest version of the APP.
Cause 1: The battery type and charging parameters are set incorrectly.
Solution: Verify the battery type and rated voltage (such as 12V/24V/48V). If it is a lithium battery, set it to "Lithium Mode" and adjust the charging voltage to 14.4V~14.6V (for a 12V system) or refer to the standard parameters in the user manual.
Cause 2: The wiring method is incorrect or loose.
Solution: Check if the wiring sequence is correct (solar panel ➝ controller ➝ battery). Confirm that the positive and negative poles are correctly connected, the wiring is secure, and the terminals are tightly fastened without any virtual connections or loose phenomena.
Cause 3: The solar panel is abnormal.
Solution: Use a multimeter to measure the open-circuit voltage of the solar panel to ensure it meets the minimum voltage requirement for the controller to start charging. If a short circuit is detected, immediately investigate the circuit and repair it.
Cause 4: The battery voltage is too low or there is a short circuit.
Solution: Use a multimeter to measure the current battery voltage. If it is below the protection threshold (such as <10V), try pre-charging or replacing the battery.
Cause 5: The controller displays a fault code.
Solution: Check the fault code on the controller's display screen or in the APP, and take corresponding actions according to the user manual (such as adjusting the wiring, recovering from over-temperature status, or restarting the device).
Cause 6: The battery terminals are not tightened or the polarity is reversed.
Solution: Check if the positive and negative poles of the battery are correctly connected and if the terminals are tightened without any looseness or oxidation. If reversed, immediately correct it after disconnecting the power.
Cause 1: The battery is not connected, or the wiring is loose.
Solution: Connect the battery end first (with the correct positive and negative poles), and then connect the solar panel.
Cause 2: The battery voltage is too low or the polarity is reversed.
Solution: Measure the battery voltage, confirm the positive and negative poles, and if necessary, replace the battery or activate it through external voltage boosting.
Cause 3: The display module is faulty, but the controller itself is working.
Solution: Connect to the Bluetooth APP to read the data and confirm whether the controller is still working.
Cause 1: The load type and power are not matched.
Solution: Confirm the load type (such as lighting fixtures, motors, etc.) and power. It is recommended that the load power be lower than 80% of the controller's rated output power. If the load is an inductive load (such as a pump/motor), please connect it directly to the battery.
Cause 2: The load current limit is exceeded.
Solution: Use a clamp meter to measure the load current to ensure that the actual working current is ≤ the controller's rated current (such as 20A). If exceeded, please replace with a higher specification controller or change to direct battery connection.
Cause 3: The load mode is set improperly.
Solution: Check the load working mode of the controller and set it to "manual mode" or the appropriate light control + time control combination mode according to the requirements to ensure that the load is powered as needed.
Cause 4: The battery is abnormal or in a protection state.
Solution: Check if the battery voltage is normal (such as a 12V lithium battery ≥ 10V). If the battery is in a protection state, please activate the battery first.
Cause 5: The battery wiring is loose or the polarity is reversed.
Solution: Check if the battery wiring terminals are tightened and if the positive and negative poles are reversed. Ensure that the wiring is correct and secure. It is recommended to rewire for testing if conditions permit.
1. Weak Light
Cause: When the light intensity is insufficient, the output voltage of the solar cell may fluctuate near the minimum threshold voltage for MPPT to start. When the voltage is below the threshold, MPPT will stop working. When the light temporarily strengthens and the voltage rises, MPPT will restart, forming an intermittent cycle.
Impact: MPPT frequently starts and stops, and cannot continuously track the maximum power point.
2. Temperature Protection
Cause: High or low temperatures may trigger the temperature protection mechanism of MPPT or the battery system. For example, when the temperature is high, the equipment will automatically reduce the load or shut down to dissipate heat, and then restart when the temperature returns to normal.
Impact: The protection mechanism causes MPPT to pause and resume periodically.
3. Battery Charging and Discharging at the Same Time
Cause: If the battery supplies power to the load while charging (charging and discharging at the same time), or if the battery repeatedly switches between full and not full states, the battery management system (BMS) will adjust the charging strategy (such as switching between constant voltage and constant current modes). MPPT needs to frequently respond to these changes, resulting in unstable operation.
Impact: MPPT needs to continuously adjust the output power, causing intermittent operation.
4. Wiring Issues
Cause: Poor contact of the wiring, high impedance, or wiring errors can lead to unstable voltage/current signals. MPPT may misjudge the state of the photovoltaic array (such as thinking that the light has suddenly changed), thus repeatedly switching working modes.
Impact: Signal interference directly destroys the continuous tracking ability of MPPT.
Cause 1: Continuous humming sound, high-frequency transformer or inductor resonance, which is a normal phenomenon.
Cause 2: Popping sound of electric arc, poor contact or MOSFET burnout
Cause 3: Burnt smell of PCB components or MOSFET burnout, related to excessive temperature rise of the circuit board, load short circuit or component damage.
Cause 4: Plastic heating smell, caused by the heating of the casing or poor-quality connectors, which may be due to poor heat dissipation or incorrect selection of wire types leading to continuous heating.
Cause 5: Irregular connections, such as reversed positive and negative poles, loose wiring, and terminal oxidation.
Cause 6: Overloaded or frequent switching of the load, such as the impact current brought by the frequent start-up of refrigerator compressors and electric pumps.
Solutions:
Temporarily stop using it and provide us with the following further information:
1. A video of the abnormal noise, which can be uploaded as an attachment to this message. It is recommended to shoot the video near the controller for at least 10 seconds.
2. Information about the battery and load connected to the controller.
3. A brief description of the abnormal noise.
4. The time point when the abnormal noise occurs: at the moment of device startup, during operation, or when the device is turned off or there is no load.
5. Whether the installation environment of the controller has good ventilation.
6. Please describe the type of unusual smell.
7. The frequency of occurrence of abnormal noise/unusual smell.
8. Provide a picture of the controller in an alarm/error state.
Cause: Charge accumulation after the battery is fully charged
Explanation:
When the battery is fully charged, the BMS will cut off the charging circuit, but the solar panel continues to generate electricity, causing charge accumulation on the battery terminals and a sudden increase in voltage.
Solutions:
1. Adjust the MPPT charging parameters to reduce the float charge voltage: Set it to 13.5V×n (n=the number of battery packs connected in series) to reduce the probability of voltage spikes.
2. Select the LiFePO4 mode: Avoid using the lead-acid mode to prevent voltage mismatch.
Optimize battery charge management:
3. Avoid frequent full charge: Discharge appropriately (e.g., reduce the State of Charge (SOC) to 80%) before recharging to reduce the triggering of BMS protection.
4. Install a circuit breaker: Place a circuit breaker between the MPPT and the battery to manually cut off overvoltage current.
Hardware improvements (optional):
5. Add a precharge resistor: If voltage spikes cause inverter protection, parallel a 20-50Ω cement resistor to buffer the impact.
6. Check cables and terminals: Ensure secure connections (e.g., use 35mm² copper terminals) to reduce contact resistance.
Suggested order of operations:
1. Prioritize adjusting MPPT parameters (reducing float charge voltage).
2. Monitor battery SOC management (avoid long-term full charge).
3. Consider hardware modifications (circuit breaker/resistor) if the problem persists.
Cause 1: E01 Battery over-discharge
Solution: The battery voltage is too low; recharge to restore voltage.
Cause 2: E02 Battery voltage exceeds the controller's limit
Solution: Check if the battery pack voltage is compatible with the controller.
Cause 3: E04 DC load short circuit
Solution: Please remove the connected load and restart the battery.
Cause 4: DC load power exceeds the controller's maximum
Solution: Reduce the load size or upgrade to a controller with a higher load capacity.
Cause 5: E06 Overheating
Solution: Ensure the controller is placed in a well-ventilated, cool, and dry location.
Cause 6: E10 Solar overvoltage
Solution: The solar panel voltage exceeds the controller's rated input voltage; reduce the voltage of the solar panels connected to the controller.
Cause 7: E13 Solar panel reverse polarity
Solution: The input wires of the solar panel are connected in reverse polarity. Disconnect and reconnect the wires with the correct polarity.
Cause 8: E14 Battery reverse polarity
Solution: The battery connection wires are connected in reverse polarity; disconnect and reconnect to ensure the correct wire polarity.
Information to provide:
1. Please provide a picture of the error code displayed on the controller.
2. Was the controller in the charging state when the error code appeared? Was there any load connected?
3. Please check if all the wiring is secure, and if there is any looseness, poor contact, or short circuit.
4. Please confirm the type of battery (such as lead-acid, lithium battery, etc.), voltage, and capacity.
5. Please provide the charging parameter information of the controller.
Note: Calibration is required for first-time use.
Cause: Current reading deviation.
Solution: Re-calibrate the monitor.
Normal Flashing Conditions:
1. Rhythmic flashing during charging is a design feature (synchronized with the indicator light).
2. During discharge >100mA, the backlight should remain on.
Abnormal Flashing – Troubleshooting Steps:
1. Try turning off the backlight → Long press the first button (top) for 3 seconds.
2. Adjust brightness → Briefly press the down arrow to the lowest setting.
3. Check power connection → Ensure the B+ terminal of the shunt is firmly secured.
1. Recommended to use Gmail, Yahoo, Microsoft, and some other public domain mail service providers' mailboxes (note that it is recommended, not required), the reason is that some enterprise mailbox service providers may have some security settings, resulting in the rejection of our mail.
2. If you don't check the incoming mail, please check whether it has been moved to spam mail.
APP version is below v1.2.4, please check whether there are spaces before and after inputting email and delete the spaces before trying again.
After registering the account, the APP can remember the devices added by the user under the condition of a network. Guarantee that the subsequent switch to cell phone use can be convenient to synchronize all the devices in the account, without having to add the device again.
In order to protect the user's account security, such as logging in for a long time in the absence of network environment to use or did not use the APP, the next time in the network environment to use, the APP will ask to re-login after use, and the APP defines that this login effective period is generally 30 days. It means that you can use device management (add, connect, view device information, etc.) without logging in again within 30 days after the first login and open the APP.
The device uses a low-power Bluetooth module with a Bluetooth connection distance of about 10 meters.
Due to the diversity of actual user scenarios, APP will keep trying to connect until successful connection in the following abnormal disconnection scenarios.
1. In the case of normal connection to the device, after the phone leaves the effective connection range (theoretically 10 meters) and moves to the range again, the APP will automatically try to reconnect after detecting the Bluetooth signal.
2. In the case of normal connection to the device, directly after the end of the APP application (the phone kills the application), the next time you open the application, the APP will automatically try to connect after detecting the Bluetooth signal.
3. In the case of normal connection to the device, directly turn off the Bluetooth function of the cell phone (common action is to pull down the notification bar of the phone, turn off the Bluetooth icon or turn off the Bluetooth function in the cell phone settings), and then turn on the Bluetooth function of the cell phone the next time, and then the APP will automatically try to connect when it detects the Bluetooth signal.
1. Before the operation, please make sure the battery is in the on state
2. Turn off the Bluetooth function of your cell phone and then turn it on again, restart the APP, and try to connect again.
3. Use the APP search nearby Bluetooth function, try to search for the corresponding device Bluetooth name. If it can be searched, try to connect the device again.
If the above 2 steps still can't be found, try to empty the battery and wait for the device to shut down, then charge the battery to turn it on (the purpose is to let the Bluetooth module restart with it). Try the above 2 steps again.
An internet connection and login is required to access the APP, but it is not necessary to manage devices. After you have logged into the APP, you can manage devices (e.g., add, view, and control devices) even if the internet connection is subsequently turned off.
Since the Android system itself is designed to connect to nearby Bluetooth devices, it must obtain geolocation information. Therefore, when the app calls the open ability of the Android system, it will ask the user to agree to authorize the geographic location before connecting. We will not obtain the user's geographic location to store or use for other purposes. If you are still worried, you can use iPhone, because IOS system does not have this requirement.
Rest assured, the warranty will take effect automatically from the date of purchase, and no additional activation is required.
If you need any assistance, you can contact us directly with your order number to help resolve any issues.
You can directly contact the seller's service email to obtain support, or you can reach out to the warranty support team using the information provided on the product or in the instruction manual.
The return label we provide is prepaid and valid. If the logistics company reports that the label is unusable, please contact us directly and we will provide it again or arrange a pick-up service to your address.
We guess it might be related to the network or device. I recommend trying to download it on another computer if possible.
If you still face difficulties, please reach out to us through the information provided in the packaging or instruction manual, and we will assist you further to ensure you receive the prepaid return label.
If you don't have the original box, it is ok to find another suitable box to pack the battery, or we can help send you a new empty box.
I understand that not having a printer can be inconvenient. I suggest checking with a neighbor or visiting a nearby stationery store, as they often offer printing services.
Since our batteries and chargers were shipped with different packages, it is possible that they arrived at your address at different times.
Overnight delivery is generally not available, but we have multiple warehouses and will arrange shipping from the nearest one based on your address. The estimated delivery time is 2-3 business days.
We are not be able to create the shipping label for Your PO BOX address of your order. And there is a big risk for missing the product at your PO BOX address.
The return labels we provided to you are prepaid, so you do not need to pay any additional shipping fees for the return. If you encounter any issues during the return process, please feel free to contact us for assistance.
We currently partner with FedEx, UPS, and Amazon Transportation. The exact carrier to use for your shipment will depend on which warehouse your product is being sent from.
Your unit should be in its original condition with the included accessories. Please remove ALL of the original labels/stickers on the outside of the box before printing/attaching the return label, then drop it off at the courier station. If you do not have the original shipping box, any generic box will work just as well.
LiTime is not liable if your package is damaged or lost due to mislabeling or improper packaging before it is dropped off at the shipping facility.
It is recommended to purchase our product directly on our official website www.litime.com or from our Amazon Store, or eBay. If you have placed an order from fake websites, such as Facebook, please file a dispute with your banking institution to get your money back. With the help of our excellent customers who have reported several of these fake websites, we have been able to remove them, and our legal team will continue to monitor and take further actions to prevent them from reappearing.
Please email us your tax exemption certificate as well as the order number to support@litime.com and allow our finance team at least one business day to review your document. If your document has met the necessary requirements, you will be notified of approval to proceed with your order.
Please note that it is only for LiTime website orders. For Amazon orders, please contact Amazon directly, as we do not have the right to refund the tax.
During promotions on our website, automatic discounts will be displayed on your checkout page. Alternatively, you can redeem your membership points for a discount code. Simply click to copy the generated code, then paste it into the promo code field at checkout—the system will deduct the amount automatically before payment is completed.
Please note that only one coupon code may be applied to an order, you cannot combine multiple coupon codes for additional discounts. Coupon codes are only valid on our official website.
We appreciate your service and are always looking for ways to support our customers. We're offering all verified members of the Military & Military Families, Veterans an 8% OFF exclusive discount. (Please note that discounts cannot be combined and only one discount may be applied to each order.) You may confirm your status through the link to take advantage of this special offer.
Yes, we do offer a price adjustment within the 30-day purchase period under these circumstances:
1. Price match only applies to sales and discounts price adjustment on our website.
2. Cannot be applied towards third-party limited sales events, such as Amazon Prime Day, eBay sales promotions.
3. Only one coupon code may be applied to an order; multiple coupon codes may not be combined for additional discounts.
If you want to cancel your order, which has already been placed and is currently awaiting pickup or in transit via shipping company, to proceed with the cancellation, you may:
1. Contact the shipping company directly to refuse the delivery
2. Refuse the package when it arrives.
Once the package is successfully refused, please confirm with us, and we will promptly process your refund.
If by chance, the package is delivered, please contact us so that we can issue you prepaid return labels to ship it back to us.
Please check here for the most up-to-date return/refund policy.
