Forum Discussion
3_tons
Jan 23, 2023Explorer III
bdosborn wrote:
Some LiFePo4 batteries recommend an absorption stage, it gives the BMS cell balancer time to work. The voltage region that most BMS balancers work in is so high on the charge curve that actual balancing might only last a minute or two. Here's what Battleborn recommends:
https://battlebornbatteries.com/programming-a-victron-smartsolar-charge-controller/
Bruce
Be advised, we are not talking rocket science here (except to those few FWC die-hards who snub a different approach).
Note that many charge controllers (as is Victron’s) are user configurable for a LiFePo4 battery format, and this configurability feature is why the moniker of ‘Absorption’ is used…Whether one cares to call it absorption or bulk (no matter…), a voltage somewhere in the high 13 teen’s to the mid 14 teen’s, not to exceed 14.6v (constant voltage, constant current) is all that’s really needed (higher voltage = faster charge)… And, cell balancing need only be done periodically…How so?? From my own observed experience, the need for rebalancing is a function of say number of ‘less than FULL charge/discharge’ cycles, and % of ‘depth of discharges’…From my perspective, and in the added interest of longevity, this is a far more cogent approach than some thoughtless ‘one size fits all’ (made-up…) calendar-scheduled approach…
3 tons
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