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svendickman asked

Battery voltage high

Hello,

I have a fairly simple configuration with 1x 12V 130W Solar Panel, 1x SmartSolar MPPT 75/15 and recently added 1x Victron AGM Deep Charge 12V 8Ah Battery.

The battery type is set to Gel Victron deep discharge, and set to 12V.

Since I replaced the existing battery with a new Victron AGM, the voltage on the battery and load have gone up to 21V (visible on bluetooth app and with a multimeter) which is what the solar panel seems to be putting out.


This high voltage has now fried 2 fountain pumps and my patio lights.

It looks like the MPPT is not doing any voltage reduction like it should be.

I do not wish to connect any new load to the battery at this voltage (which I guess is probably damaged) as it will probably damage it as well.

Any suggestions on what might be going wrong?

Sven

MPPT Controllersovervoltage
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2 Answers
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svendickman answered ·

Automatic Equalization is disabled and has never been manually started.

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klim8skeptic answered ·

Please check that the mppt has not been set to (or auto selected) charge a 24v battery.

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svendickman avatar image svendickman commented ·
Hi, thanks for the reply, but the voltage is correctly set at 12V, I've even tried setting it to 24V (at night for a few minutes) and then setting it back to 12V.
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