Breaker size

[mapmaker]

Yeah but that is a bad idea Dave. Breakers are not deigned to be used as a switch. Using it as such weakens it.

How does it weaken it? Is it the springs, or are you referring to pitting of the contact surfaces, or something else?

btw, Midnite uses polarized breakers in their combiners and they are polarized as switches... i.e. the PV+ from each string goes to the line (+) side of the breaker. In the event that one of these breakers trips due to reverse current flow through a shorted string, it is breaking a current with a higher potential on the breaker's load (-) side.

Also, Sunking, would you care to comment on my question to you in post #9 in this thread?

--mapmaker