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dreamagic avatar image
dreamagic asked

MPPT 100/30 will not switch on

I have an MPPT 100/30 with a Bluetooth dongle. It has worked perfectly for 18 months. Recently I disconnected and reconnected the solar panels but now the controller sits in the off position.

I have tested the connections and get 57v at the wires to the PV. But when I connect the wires if I put a multimeter across the PV terminals there is no reading.

The blue LED blinks every 4 seconds or so.


MPPT Controllers
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klim8skeptic avatar image klim8skeptic ♦ commented ·

Sounds like reverse polarity PV connection. Please check.

A bad connection on the PV wiring gives similar results.. check.

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Paul B avatar image
Paul B answered ·

answered as per comments by klim6skeptic

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