question

abrgrg asked Jan 17, '23

MPPT Charge Controller - Absorption Charge time low - is this right?

HI There,

I have 3 x 12v/220ah Victron AGM batteries connected in Parrallel. For charging i have a Victron Smart Solar MPPT 100/50. These are connected to 3 x 435w Canadian Solar Panels.

My concern is around the time the chargers sit in absorption charge. Its not very long. As an example. It will sit in Bulk charge for 7h, absorption charge time will be 30mins then go to float for a few hours. Is this right? I have attached my settings and screenshot of the charging over the last few days.

Any help/advise would be greatly appreciated.

Thanks

MPPT Controllers

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screenshot-20230117-073922.jpg (413.2 KiB)

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klim8skeptic ♦ commented · Jan 17, 2023 at 08:10 AM

Is your battery minimum voltage recorded correct for the start of the day? (when adaptive absrop calcs are made)

Or could the voltage be registered later in the day when a large load drops the batt voltage to the re-bulk voltage of 12.4v?

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