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diy solar

Paneling a PWM controller

Bluedog225

Texas
Joined
Nov 18, 2019
Messages
2,830
Would I be pushing my luck to have four (4x) 100 watt panels in parallel on a the Victron BlueSolar PWM Pro Charge Controller 12/24V-30A.

This calculates out to 33.3 amps.

But I’m under the impression that the voltage both open circuit and under load is higher than 12. And that the panels rarely product 100 watts each.

If I adjust the collective panel output to 90% I get 360 watts. And if I adjust the voltage to 13 volts, the calculation changes to 27.7 amps.

I don’t know how to adjust for a cold day. We can get down to 10-20 F occassionally.

I’d rather not smoke the little controller and can be quite happy with the three 100w panels I have but wouldn’t mind getting the most out of it.

Thanks
 
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