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Off grid. Can I do these in series for 12v

Kywood91

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Jun 19, 2020
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We finally mounted the panels to the roof of our bus. I plan on wiring them in series- is this a good idea for 12v? We have 2 valence batteries. Mmpt charge controller and a Jupiter inverter (which can only handle 12v). The only things we are powering are portable frig, phones, and some 15a tools, water pump.
Also we talked to an electrical engineer a while ago he said all our components were correct but he also said he's never done anything off grid before so I just want to check if everything looks correct.20210510_155225.jpg16216047111188985946446047636887.jpg16216047410714969193919463945503.jpg16216048010786347361955915003157.jpg
 

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1) Please just list the exact model #s with links to the products. Much easier to discern and digest.

2) Please type out your (handwritten) specs so it can be easily re-used for quotes.

Sooo you'll have 2 batts in parallel for the inverter, and you have some EPEver SCC for the panels. As long as the panels voltages and current are below the input rating for that device, it should be fine. You can (probably) wire them in series or parallel or both to accomplish this.
 
1) Please just list the exact model #s with links to the products. Much easier to discern and digest.

2) Please type out your (handwritten) specs so it can be easily re-used for quotes.

Sooo you'll have 2 batts in parallel for the inverter, and you have some EPEver SCC for the panels. As long as the panels voltages and current are below the input rating for that device, it should be fine. You can (probably) wire them in series or parallel or both to accomplish this.
My bad I already screwed it down so I didn't want to unscrew it. I figured since I only have 2 panels I could probably do either. I just wanted to make sure it definitely wasn't going to 24v because I don't believe the inverter can handle it.
 
i was about to ask how many panels do you have... 3 in series might be pushing it on a cold day.. 2 is great....
 
My bad I already screwed it down so I didn't want to unscrew it. I figured since I only have 2 panels I could probably do either. I just wanted to make sure it definitely wasn't going to 24v because I don't believe the inverter can handle it.
Your system voltage is set by your battery voltage which is 12V
Panel voltage is pretty much irrelevant when using a MPPT SCC.
Just keep the max volts input under the SCCs limit after compensating for increased voltage from your coldest temperature.

If you wired your two 12V batteries in Series you would have a 24V battery so need a 24V inverter.
 
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