diy solar

diy solar

Operating volts running to high?

Goodoz

New Member
Joined
Sep 15, 2020
Messages
47
I currently have 5 200W 12V panels connected in series. The panel operating voltage is 20.4. So 5 should be at a max of 102V. The temperature is 86 degrees with full sun and I'm running 107-108V. The instrument reporting the reading is a Victron 150/35. Should I be concerned?
 
The 20.4V is probably your Vmp (max power point voltage). You have to check the Voc (open circuit voltage) and make sure that doesn't go over what your controller can handle. In addition, voltage will increase with dropping temperature, so you have to take that into account as well.

I made a calculator some time ago:

 
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