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Old 03-11-2017, 12:30 PM   #1
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Could it be this simple?

I have a 100 watt solar suitcase panel. Now that prices gave dropped I was thinking of adding a flexible 100 watt panel to the roof (connected to a SunSaver -10 controller). I would like to be able to run them both simultaneously. Could I connect them both to this

... and then plug it into the sae quick connect plug I have on my battery box?
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Old 03-11-2017, 12:42 PM   #2
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They don't look large enough in wire size to prevent a significant voltage drop.
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Old 03-11-2017, 12:54 PM   #3
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They are 18 gauge- I have seen some with 14, even 12 gauge. What gauge would I need for it to make it worthwhile?
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Old 03-11-2017, 01:22 PM   #4
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Minimum 10 but I am not sure of the logistics of such a set up. I swapped out the low amp controller that came with my Renogy 100 watt suitcase with a 30 amp controller to handle the extra amperage when I added an additional 100 watt panel to the system. Total 200 watts with room for another 100 if desired.

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Old 03-11-2017, 01:32 PM   #5
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Wire gauge depends on the length of the run, and the wire construction. 14 gauge varies between .025 and .035 volts of drop (with the low side being stranded and the high side being solid) for every amp of current and 10 feet of run. So with #14, at 10 amps and a 10 foot run, you lose, on average, 0.3 volts which is, at least for me, a little on the high side. For every wire size you go up, i.e. to #12, the loss is cut in half. So #12 would be about .15 volts, getting to be an acceptable number.

One caveat, you have to consider the total length of the run, both positive and negative sides, between the panel and the battery.

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Old 03-11-2017, 01:44 PM   #6
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Each panel would have its own controller. The 100 watt suitcase has its built in one and the flexible panel its own. I guess I'm asking if the setup I mentioned would work funneling two controllers.
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