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I did some searching and am still confused, as maybe my start is too simple. Right now, I have the following 2x200 Watt GrapeSolar panels hooked up in series IIRC with a 40 watt non-mppt controller 1 Renogy 50AH Lithium battery 1 Renogy 20 Amp AC-to-DC LFP Portable Battery Charger 1 MaxxAir...

I am looking at building out a basic system like this and have some questions. Right now, all I have is a 33AH AGM battery that I use to run my HAM base station when off grid. What I would like to do is the following Setup a system with 1 panel for now instead of the 4 in the layout above and I...