The run time of your trolling motor depends on the amp hour (Ah) capacity of your battery and the motor's current draw. Follow this simple formula:

Run Time (hours) = Battery Capacity (Ah) / Motor Current Draw (A)

For example:

Your trolling motor draws 54A at full throttle. You have a 100Ah battery.

Run Time = Battery Capacity / Current Draw

= 100Ah / 54A

= 1.85 hours

= 1 hour and 51 minutes

So the 100Ah battery would run the 54A motor for about 1 hour 51 minutes at full speed.

To find low speed run time:

If the motor draws 10A at half throttle.

Run Time = Battery Capacity / Current Draw

= 100Ah / 10A

= 10 hours

No. LiTime LiFePO4 lithium batteries are not intended to be used as starting batteries but deep cycle energy storage, please do not use them to start any devices.

LiTime 12V 100Ah TM LiFePO4 batteries can charge between 32°F to 113°F (0°C to 45°C). The 12V 100Ah TM version has low-temperature charging protection function, it would cut off charging when it's below 0℃.

The group 31 batteries is the most popular battery size, measuring approximately L13*W6.8*H9.44 inch, which is widely used in boats, RVs, home storage, and off-grid. LiTime 12V 100Ah TM LiFePO4 battery measures L13*W6.77*H8.43 inch ans is 2~3X lighter and 5X lifespan of traditional group 31 batteries. It is a powerful and compact replacement for group 31 batteries.

Suggest reading on Full Guide of Group 31 Battery.

LiTime 12V 100Ah TM LiFePO4 LiFePO4 battery weighing 23.4 lbs, is 1/3 the weight of a traditional group 31 agm battery or group 31 lead acid battery and releases larger energy. It's a perfect replacement to AGM group 31.

Yes, LiTime has a portable battery box for group 31. Built in voltmeter, it can be used for marine & RV, fitting for group size 24 battery, group 27 battery size and group 31 battery size.

1. Using Solar Panels

The battery can be fully charged in one day (with effective sunshine 4.5 hrs/day) by 300W solar panels. It may take more than one day to fully charge the battery by ≥300W solar panels since the duration and intensity of light would be a great factor for their charging efficiency.

Besides solar panels, there are 2 more ways to charge. Suggest reading: 3 reliable ways to charge LiFePO4 lithium batteries

2. Generator/Alternator

If the alternator or generator supports DC output, a DC-to-DC charger is needed to connect the battery to the generator; if your alternator or generator supports AC output, please add a suitable battery charger to connect the battery and the generator according to our recommendations. The Recommended Charging Voltage:  14.2V - 14.6V. The Recommended Charging Current: ① 20A (0.2C): the battery will be fully charged in around 5 hrs to 100% capacity; ② 50A (0.5C): the battery will be fully charged in around 2 hrs to around 97% capacity.

3. LiFePO4 Smart Chargers

To charge 12V battery, it is recommended to use 14.6V battery charger.

The Recommended Charging Voltage:  14.2V - 14.6V.

The Recommended Charging Current: ① 20A (0.2C): the battery will be fully charged in around 5 hrs to 100% capacity; ② 50A (0.5C): the battery will be fully charged in around 2 hrs to around 97% capacity.

During use, inconsistencies between cells can increase over time. When connecting too many batteries in parallel, this can cause faster degrading batteries to trigger protection and fail prematurely. Therefore, paralleling more batteries is not always better. The industry standard maximum is 4 paralleled batteries.