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Old 11-03-2016, 05:30 PM   #1
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battery bank question

Hey there, wondering if anyone can provide me with some insight or ideas. I recently installed 300 watts of solar panels on the roof of my skoolie. It runs into a MPPT charge controller and then to a 12 volt battery bank (4 6V batteries wired in series then parallel). Then a 2000 watt inverter.

My question is.... Should I go with in line fuses at every link in the chain? Is it necessary to fuses the pv cables going into the charge controller?

Any help would be greatly appreciated.
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Old 11-03-2016, 07:31 PM   #2
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yes fuse before charge controller, then another going to batteries, then a big one between batteries and inverter. 2000 watt inverter would use a 500 amp fuse. your charge controller manual will have the specs for its protection. good luck
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Old 11-05-2016, 06:23 PM   #3
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Fuse your sources of power. In your case, a big fuse for the battery bank and a fuse for the solar panels.

Personally, I only fused my battery bank with a 400 amp fuse. I also have a 2000 watt inverter and do not ever expect to draw more than 400 amps from my bank.

I could fuse the panels and charge controller but ehh... I think the charge controller is internally fused at the output. I do have two disconnects... one for the solar panels and one from the battery bank. When I need to service the electrics, I turn them both off and it cuts all power making it service safe.

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