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Settings for a Victron 150/60 charging a bank of (18) 36v scooter batteries. Absorption/Float/equalization. (Daly 30A 36v BMS)

greengooseman

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Oct 4, 2020
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I have (9) 325W solar panels in a 3s3p configuration. My battery bank consists of (18) 36v used scooter batteries each with their own 30A Dally 10S BMS.

Battery packs:
40 cell 18650 10s4p (36v)
Typical Capacity: 3200mAh
Nominal Capcity: 3100mAh

I am using a Victron 150/60 Solar controller. For the past year, I manually set up the Bulk/Float/Equalization to 42V on all 3. I havent had any issues however I feel that this is not correct or at least not optimal.

PDF for Victron 150/60

In the PDF is shows for a 36v system:
Absorption: 43,2
Float: 41.4
Equalization: 48,6 (This is the one that I really dont understand)

DALY BMS spec PDF

I never looked at the limiting parameters as to what is best for my DIY batteries.

Can someone explain which voltages should or should NOT be in the 3 charging parameters?

Thank you.
 
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Those values are the defaults for flooded lead acid.

Equalization is a special high voltage charge applied to flooded lead acid batteries to reverse negative effects of operation.

If your 18650 are 3.7V nominal Li-Ion with 4.2V charge voltage, then 42V for 10S is correct.

Absorption: 42V
Float: 41V (you don't need to float them)
Equalization: disabled or 42V
 
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