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crcr's avatar
crcr
Explorer
Jan 07, 2020

Solar Panel, Unmarked Pigtails, which is Positive, Negative?

I bought 5 solar panels recently, the pigtails on the two HQST solar panels are marked as to positive and negative, but the pigtails on the three Renogy 100w panels are not marked. On the HQST panels...
Bill_Satellite's avatar
Bill_Satellite
Explorer II
Jan 08, 2020
While I suspect that the information above is correct about which is positive, the best advice is to check the connections with a multimeter. Set the panel in the sun and put your probes on the 2 connections. If you have red to red and black to black you will see a 12V (or whatever) reading. If you have it backward you will see -12V.

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