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This battery is $100, and will only be used to run a SMAD 12v refrigerator. My questions are is it safe for inside a vehicle? Any questions I should ask the seller?

100ah 48v server rack battery won’t turn on after someone (my grandmother, 85) spilled water on it. She “cleaned it up” I didn’t know till the next day. I work up to it being off and not tripped. Not sure if I can even save it.

Will be running: Refrigerator, window unit ac, fan, tv, 12v lights/chargers etc. Plan to wire this up like Will’s 48V 3KW HANDTRUCK SYSTEM I plan on using 10 solar panels in strings of 5 possibly upgrading to 20 (is that overkill?) is it necessary? I will be expanded this to 4 batteries by...

I have 1-245w solar panel 8.15a 37.75v 1-Renogy Rover 30am charger controller 1-Renogy deep cycle AGM batter 12v 200AH 2-SPARKING 3FT Car Female Cigarette Lighter Plug Socket to Eyelet Terminals 12V Extension Cable with 10A Fuse (3FT) & (6FT) I only use it for my 12v refrigerator and I have...

I have been using a portable 21w folding panel to charge my power banks that I use to run lights and fans. Only issue I have is refrigerator I have a generator that runs my A/c unit when home, and was planning on buying a battery charger to charge up batteries to run my Dorm refrigerator. My...

I was going to buy two of this battery running in series. I only have a 12v refrigerator and USB devices.

Ok so got some questions. I have 4-250w panels see photo. Planned to be wired in series and parallel. renogy 30 amp charge controller to the batteries. 2 - 200 amp hour AGMs Renogy. (Series?) fuse150 amp (not sure size???) then that will run to an inverter (MSW) 1,000w A fuse block I use A LOT...