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solar4cam avatar image
solar4cam asked

SmartSolar 75/15 MPPT Not Dark Starting Battery

I have had a couple of times where my LiFePO4 batteries BMS's MOSFETS have turned off the battery overnight due to low state of charge but then the Victron 75/15 MPPT doesn't do a Dark Start the battery when solar input resumes. Any reason why the 75/15 won't do this? Could this be a Firmware issue? Firmware is up to date.

MPPT SmartSolar
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Guy Stewart (Victron Community Manager) avatar image
Guy Stewart (Victron Community Manager) answered ·

Hi @Solar4Cam

We have just released a firmware update v1.64 to fix this issue - see here for more details https://professional.victronenergy.com/news/detail/244/

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

Can you make a screenshot when that happens?

There is a difference if the MPPT doesn't start charging or if the battery doesn't wake up.

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nickdb avatar image nickdb ♦♦ commented ·
To add, some batteries have a restart procedure to wake the BMS. It is never a good idea to run a battery down to the point it turns off.
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