It is being charged by both the solar and convertor. I was at 1/4 yesterday before I started in on this. Today it was at 11.92 or 3/4 after being charged with home shore, 20A circuit. Which lead out of the convertor goes to the battery box. Convertor had 12.74V coming out of it and I think those are the cables going to the battery box. The convertor said 745A 12V. Also have 2 AGM batteries in parallel.