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I set the rebulk offset to 2.2 volts which should only restart a bulk when the battery reaches 25 volts.
But it keeps bulking every morning.
Most recent software.
Am i missing a setting that causes this?
With kind regards,
Marc van der Heide
So the re-Bulk maybe applies only after the charger switched from Bulk to Absorption or from Bulk to Absorption and then Float in that day.
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But why would you not want to charge the battery?
Hi @Marc Heide
I agree with Seb71. Guessing too, but the mppt knows it's a new day, and I'd expect it to start afresh.
Try using the 'Tail' setting, which will terminate/override Absorb phase earlier than the Fixed/Adaptive settings. For you, maybe set to 1.4A. It won't stay in Absorb long, and a short time won't hurt the battery.
From the manual.
Section 6.2, MPPT starts a new charge cycle daily. Rebulk offset will thus have no effect. New day is sunrise (and /or applying power to the MPPT after it's been disconnected, my experience).
Section 5.2.1 settings/p19 Rebulk offset - linked to float setting and actual battery voltage. It's used during the day when loads reduce battery voltage to trigger a new charge cycle.
Note that if the MPPT has not been charging for an hour, a new charge cycle will start as soon as it's able to charge again.
So working as designed.
Suggest you put the rebulk offset back to default, or you will have a seriously depleted, possibly damaged battery if there's a significant load.
