Hi, I’d like to add two 100w solar panels to charge my batteries. I have 3 batteries. 2 are house. Is there a way to charge all 3 with one controller? Or do I have to just hook jit up to one battery?
Below is my setup in photos.
I think you are saying that they need to be charging either a single battery or multiples of the same type of battery wired in parrallel or series. Is that what you mean by bank? I’ve read a bunch on batteries, but I’m just getting up to speed on all the different issues.
The two house batteries are in parallel so they count as one big battery - that is the "house bank". You can run the solar controller to the house bank and use a Blue Sea Systems 7610 SI-ACR Automatc Charging Relay - 12/24V DC / 120A between the house bank and the reserve battery to keep all charged.
While you're working there you should put some fuses on or very close to the battery . The Blue Sea MRBF Terminal Fuse Block with 150 amp fuses are good protection.
MaineSail has articles about all of this - search marinehowto.com.
Here is the link to the ACR information - https://marinehowto.com/automatic-charging-relays/