New house battery, now steps & inverter not working.....

Fuses are good on the unit.
It is allowing my new battery to drain down and not charging it.

I am wondering if it and/or battery were going bad on my last trip last month as while plugged to shore power lights would cycle dim/bright with the converter fan kicking on/off. The old battery had been topped off with water 4 weeks back and were bone dry the other day. Which is why I replaced, which started this hunt.


This is the unit I have:

Clicky


Still no steps.