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  #1  
Old 01-06-2015, 04:20 AM
Arcking1 Male Arcking1 is offline
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Default Solar Panel wiring to charge controler

I have 21 275 watt panels and a outback 80 amp charge controler.
What is the best way to setup the panel strings?
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Old 01-06-2015, 08:46 PM
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Howdy and welcome to the mix..

I would need a little more information to give you a good answer. What panels do you have? What model Outback?
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Old 01-08-2015, 06:48 AM
Arcking1 Male Arcking1 is offline
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Suniva OPT260-60-4-1B0 260W Mono BLK/BLK Solar Panel
Outback flexmax 80
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Old 01-08-2015, 06:52 AM
Arcking1 Male Arcking1 is offline
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30' from panels to basement where charge controler and inverter is located.
Currently have panels in 3-panel strings...10 strings, 10ga cable
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Old 01-08-2015, 09:44 AM
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Do you have 21 or 30 panels? What battery voltage are you working with?

You "could" connect 4 panels in series but that would be pushing the limits of the controller. (Voc 152.4 volts) The Vmp would be ~120 volts, which is safe. Just don't ever disconnect the battery from the controller before disconnecting the panels from the controller first..

30 panels is pushing the current max of the controller. I'd be careful with that. Imp would be ~85 amps and if the battery was somewhat drained, the Imp could approach 90 amps..

Personally, I wouldn't push the limits that close..

References..

http://www.civicsolar.com/sites/defa...eet-146633.pdf

http://pdf.wholesalesolar.com/contro...FM80-Specs.pdf

I'd be looking at a larger gauge wire from the panels to the controller. 80 amps is a lot of current to get through a 10 ga. wire, regardless of the distance/voltage. I would recommend 4 or 6 gauge at the least..
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Old 01-09-2015, 01:59 AM
Arcking1 Male Arcking1 is offline
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Thanks for the update 12vman
I thought I had it right.
System is 48 volt.
Each string is cabled from roof to basement with it's own 2 wire, pos & neg, 10ga run to a fuse panel
From fuse panel to charge controler is 24" of #6 ga
I may add a second controler if I see the amp getting closer to limit of 80

Btw have you any thought on the Aquion battery storage???
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Old 01-09-2015, 02:00 AM
Arcking1 Male Arcking1 is offline
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21 panels now looking to add 9 more.
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Old 01-09-2015, 08:27 AM
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I'll be watching this. The plant isn't very far from me! Could save some cash by going direct to the factory to avoid shipping..

https://gigaom.com/2014/07/20/behind...solar-storage/

If you have a separate 10 ga. run from each string, you are fine but you are still pushing the limits with one controller. I'd highly suggest adding the second one..

Keep us updated..
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Old 03-03-2015, 08:07 PM
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Here's a related question. I've got 4 100 watt panels that are wired in parallel in a homemade junction box that I fused. The original plastic has deteriorated in the sun to the point of crumbling, so the wiring is now exposed to the weather and starting to corrode.

What exactly would you call a box to converge all the the individual solar leads to feed into the charge controller? The way I constructed the box, all the individual solar + and - wires with ring-type crimped-on connecters are attached to + and - copper strip busses. The + and - busses are then connected to 8 gauge copper wire that runs into the cabin and down to the charge controller.

I'd like to replace this with a commercial product designed to handle the weather. What to buy? I've already searched for "junction box" and all I find are the little solar boxes that contain the reverse flow diode.
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Old 03-03-2015, 08:43 PM
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https://www.solarblvd.com/index.php?...d2ce719b6b5156
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  #11  
Old 03-31-2015, 03:08 PM
wywhitewolf Male wywhitewolf is offline
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Quote:
Originally Posted by MichaelK View Post
Here's a related question. I've got 4 100 watt panels that are wired in parallel in a homemade junction box that I fused. The original plastic has deteriorated in the sun to the point of crumbling, so the wiring is now exposed to the weather and starting to corrode.

What exactly would you call a box to converge all the the individual solar leads to feed into the charge controller? The way I constructed the box, all the individual solar + and - wires with ring-type crimped-on connecters are attached to + and - copper strip busses. The + and - busses are then connected to 8 gauge copper wire that runs into the cabin and down to the charge controller.

I'd like to replace this with a commercial product designed to handle the weather. What to buy? I've already searched for "junction box" and all I find are the little solar boxes that contain the reverse flow diode.
Combiner box
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