The Watt&Sea converter is compatible with all types of battery (lead, gel, AGM, lithium, etc...)
You just have to check in your battery manual that the recommended voltages aren’t under Watt&Sea converter’s.
(14,3V / 28,6V)
If there’s a difference between the two voltages, it’s possible to set it up with the free software, available in the download section.
Lithium Battery Management Systems (BMS) often require to be able to stop prodution sources, for safety reason. Then, a relay has to be used (available in « accessories ») to short-circuit the generator when you’d like to stop the production.