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wrnoof avatar image
wrnoof asked

MPPT on bulk when Quattro on storage.

Our Quattro is now at this instant charging in storage mode, but our BlueSolar is charging at bulk. Is this OK?

MPPT ControllersMultiPlus Quattro Inverter Charger
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Mike Dorsett avatar image Mike Dorsett commented ·
please can you provide more details about your system? If using parallel, independent chargers, then they both need to be set to the same voltage points.
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wrnoof avatar image wrnoof Mike Dorsett commented ·

The solar and MPPT were installed by the new boat dealer. So, I don't know the exact arrangement. I assume the Quattro and MPPT are parallel for charging the AGM house bank. I can't think of another arrangement for having dual chargers for the same bank.

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Justin Cook avatar image
Justin Cook answered ·

This is expected behavior, yes. The MPPT doesn't have a storage mode, instead starting every day with a new charge cycle, and the Quattro won't pop out of storage mode until the battery bank voltage drops below the rebulk voltage threshold (or until it's time for its refresh charge), which the bank probably won't fall to since it's being recharged by the MPPT.

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wrnoof avatar image wrnoof commented ·
I was thinking the MPPT would shift to float rather than stay in bulk. I think bulk voltage is higher than float or storage. Is there any danger of damage to the AGM batteries?
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