I wrote the be wary of incoming voltage review. I would like correct what I said. Ends up the reason the charger/bypass wasn't coming on was that I some how bumped all the dipswitch to be set to 0 vice 1. Set them back and is working fine down with my line 123v. It is weird though that when set to inverter preference that it sends some weird feedback that trips a GFI outlet.
Saw another review similar to mine where the person had 126.7v. Maybe pick the 90-135v dipswitch and see if that works. I would have given a 5 star review except no has from support has gotten back to me yet. I just happen to see the dip switches were wrong which was hard because usually 0 is on the left and 1 on the right but it just the opposite so I had to get up close to see they were wrong.

Purchased 3000 watt inverter/ charger, 2ea. 12V 230AH lithium batteries and 40A DC/DC charger for motorhome, thought I had a bad inverter because it wouldn’t come on or recognize grid power, started my generator and it came on and charged as expected, when turned off generator it stayed on a few minutes and same problem, I am an electrician so after checking all my hook up and etc. found all correct so then I read the book and input voltage is 110 +/- 10% which is only 121 volts on high side, my incoming voltage is 126.5 so that is reason it doesn’t stay on. Could have ordered a lithium charger and used it when connected to grid at home but I opted to install an isolation transformer, and a 3 kw cost as much as the inverter but it should protect the inverter and no having to switch plugs and etc. from one charger to the other. Haven’t really tested the batteries yet but will be going on vacation soon but I am happy with so far except for mounting a 55lb transformer under my MH was not fun!

The charger / grid bypass only works if voltage is 110v +/- 10%. That is 121v. My RV generator produces like 122v and my house if I hook up to it is 122/123v. So I guess I can only get the charger / bypass to work if there is enough load on the grid to get to 121v or I can somehow adjust my generator voltage. I have gotten it to work when the voltage is 120v. They need to make the spec 115v +/- 10%. Inverter works great though, can start both my ACs on the RV on it without a soft start.

Installation manual needs more information, otherwise it fits into my small space and works great.

I received the converter/charger in a couple days. Was very impressed with delivery time. I’ll give an updated review once I get it up and running. Patrick’s been a big help. His knowledge is very professional. Once I get this installed in my race car trailer, I’ll send pics and a updated review.