No I do not check water levels in my batteries. They are sealed gel batteries (x2) and my trailer does not have an inverter. This “hardware” looks like a big chip board. One side has green and white wires going to breaker #2 marked “general” other side of board has red and white wires, thick gauge going to a bus bar looks like. If I flip the #2 breaker off than it doesn’t spark as there is no power obviously. But my fridge tv and batteries are receiving no power. This is not an issue of being plugged into a gfi. Had no problem the last 4 years. No name or branding on chip board other than some numbers. Punched them in google and didn’t find much. Let me figure out this photo bucket ****. Who woulda thought the 30 yr old is struggling with photos lol