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Mppt 250/100-mc4 ve.can what is+ on the pv 3 mc4

+ - pv mc4 there no labels on it at all don't know what is what so if anyone could help I would be gracefully for it

MPPT - Solar Charge Controller
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rickp answered ·

I believe the negative is in front, positive in rear. The two-MC4 version is marked in this Victron data sheet. I’m sure the three-MC4 uses the same connectors.

https://www.victronenergy.com/upload/documents/Datasheet-SmartSolar-charge-controller-MPPT-250-60-and-250-70-EN.pdf

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