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This is the simple answer that's useful to beginners. I've got a 40 amp renogy rover. I'm still a bit unclear how many watts I can input at 12 volts and 24 volts.

My charge controller has sealed, flooded and gel settings. I have an AGM battery. Which setting is best?

Both CCs (20&40 amp) I have are MPPT, but older and don't have an option for lithium. I bought the system some years back and its just sat in the boxes, cool and dry.

They both are MPPT, just older and not suitable for lithium, or so I'm told.

Looking forward to expanding to 400w. In time I'll get a newer charge controller and lithium battery. For now I have to use what I have.

I'm using a single 95AH AGM battery. Limited output, but that's what I have. The charge controller is a 20 amp older Renogy, new in box that's only for lead/acid. I also have a 40 amp Renogy, also NIB. I'm just charging cellphone and running a few strings of COB LED lights. The panels are 100w...

I'm building a 200 watt system. Will's video shows the two panels in series. This will feed 24 volts into the charge controller, right? Will the controller then automatically feed 12 volts into the battery?