MPPT 100/20 very low voltage

My MPPT 100/20 suddenly only sees less than 1v on the battery. I’ve checked all connections. The wires into the MPPT when disconnected show a normal 12.2v, but once I connect this up the screws in the MPPT show a voltage of about 0.74V. The fuse is fine, the firmware is up to date. So not sure what to do here. Any ideas?

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seb71 commented · Jun 29, 2022 at 12:03 PM

The wires into the MPPT when disconnected show a normal 12.2v, but once I connect this up the screws in the MPPT show a voltage of about 0.74V.

0.74V is shown by MPPT (in VictronConnect) or is measured by you with a multimeter on MPPT battery terminals? Or both?

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lambertkleinjans seb71 commented · Jun 30, 2022 at 09:56 AM

Hi, thanks for asking. When double checking this i realised there was a weak connection on the negative wire which caused the voltage jump. This is now sorted.

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