For whatever reason it didn't seem to want to charge via solar. The two batteries were in parallel, and it was either always in a standby or discharge state while the other battery was charging. After two days at the Earth ship, it would be down to 0% well the other one would be hovering around 32 and, in my opinion,was handling all of the load that we were using.

I even switched things around in terms of positive and negative from the solar controller as well as to the inverter. Seemed to always turn out the same. Upgraded from a 30 amp to a 60 amp, solar controller and… Same issue.

I have three 200 W solar panels. They seem to bring in a lot of amps to the solar controller but… The lithium battery just didn't seem to like it. The lead acid, however, always charged it up. And… Yes, I made sure the solar controller was configured for lithium.