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Old 16-03-2022, 22:01   #1
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Dual breaker switch between solar panels and MPPT

1. Why do you need to have it?
(Dual = both positive and negative)

What’s the contingency it is meant to cover?

2. If you have it, what brand/kind?
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Old 16-03-2022, 22:30   #2
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Re: Dual breaker switch between solar panels and MPPT

My understanding is you only need a switch rated for the current on the "+" side of the wiring...meaning the red wire.
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Old 16-03-2022, 22:43   #3
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Re: Dual breaker switch between solar panels and MPPT

I have a couple of solar regulators which common the positive and do all the switching and regulation on the negative. I also have ones which common the negative and do the switching and regulation on the positive. Perhaps it's to take care of both contingencies when isolation is required.
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