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sam1340 avatar image

Too much Solar?

I have a MPPT150/85-MC4 that specs say it can handle 1200 watts and deliver 85 amps. I have 1800 watts of panels. Will I ruin the controller when these panels go to full power or will it bleed off the excess?

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Matthias Lange avatar image

As long as the PV short circuit current is less then 70A (max. 30A per MC4 connector) and the max. PV voltage (at coldest conditions) is less than 150V, everything is fine.

Datasheet:
"If more PV power is connected, the controller will limit input power. "

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