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I have 5 of the panels shown in the photo and I need to end up with a 48V system. I have an EG4 48V controller/charger, and one 48V 100AH battery from Signature Solar. Will someone please help me? I am a 73 year old retired blacksmith and want to run my small man cave with this system. Thanks...

ebay.com/#:~:text=3%20SOLD,and%20Touch%20Monitor Found this on Ebay and wondered if anyone has any knowledge about it. It is a 48V 105 amp golf cart battery with charger for $839.99, would it be good in a solar application? https://www.ebay.com/itm/376096455299.

I have 4 100ah lifepo4 cells that are new and within .5v per cell. I hooked them all in parallel and left them for 21/2 weeks and now all are way out of balance, from 2.9 to 3.2 volts. What is going on?? Any help would be greatly appreciated.