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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...
BFL13's avatar
BFL13
Explorer II
Jan 08, 2020
Yes the MC4s unsnap easily, but the metal pin in the ones I showed that you have to assemble onto a wire, have those little one-way grabbers that don't come back out once you shove them in.

The links I gave show a photo of the metal pin with its little grabbers, which keep the wire from being pulled out of the MC4 once assembled.

There might even be a proper name for what I am calling "grabbers" :)

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