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keith-clarke avatar image
keith-clarke asked

Blue Solar MPPT 150/35 gives over-voltage error, but voltage is nominal on both sides

I have a BlueSolar MPPT 150/35 that gives the over-voltage error (the Absorption and float LED quick flashing continously) when it is turned on. However, I have measured the voltage on both sides, and it is well within the nominal range. Battery side is just over 48v while the solar side is ~120v. I have six REC310TP2M panels, arranged in two strings of three. These have an open circuit voltage of 39.8V, and should be within the acceptable voltage range well below 0 degrees F.

I've called my distributor, and they had no suggestions. Any help?

MPPT Controllers
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1 Answer
klim8skeptic avatar image
klim8skeptic answered ·

It could be that the mppt has been previously configured for a 12-24v battery bank.

Once the auto battery voltage select has locked in a battery voltage, it then has to be manually changed to a different voltage.

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