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perseverance avatar image

MPPT 100/50 Controller not connecting

I have a solar charging system with 2 banks: 4 panels on the roof and 2 on a wing at the stern. They connect to 2 x MPPT 100/50 controllers charging 3 x 200Ah Lithium batteries for house supply.

This morning the controller for the roof panel reads "connecting" and I have not been able to rectify this. On visual inspection nothing has changed, all connections look good. The installation is only a few months old. Powered everything down at breakers and restarted but no joy. Found no reference to this error message in the manual.

The bulk light is on and flashes once every 10seconds or more. The wifi connection to the roof panels shows normal operation.

Hoping someone can help or send a link to steps to fix. TIA


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mppt smart solar
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Swap the displays to see if the problem remains at the same charger or moves to the other charger (then the issue is that display or cable).

1 Answer
Eduard avatar image
Eduard answered ·

Suggest that you first check the software and update.

Latest is 1.56.

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