Charging huge bank vs tiny battery

[GeorgeF]

Someone claims that, for cyclic service, there is a big difference between charging a huge 2v battery bank with a lot of charge controllers and 1000A+ flowing

and

charging a 50Ah lead acid with for example a 100-150Wp panel @ home.

He claims that because 1000A+ flowing the duration of absorb MUST be programmed short and rather fast must switch to float.

Recommendations here is to charge with "set bulk=absorb=float" for cyclic service when charging with PV only.

Im really wondering if you follow the charge instructions of the manufacturer ref max charge rate, and the recommendations here on this forum, if there is a difference charging a huge bank vs a tiny battery.

[Mike90250]

Big battery or small battery, most lead acid require about 10% of capacity for the bulk recharge rate. After bulk completes, the battery will naturally lower the charge current because of the lesser voltage differential.
a 10Ah battery would want 1A available for recharge
a 1200Ah would want 120A available for recharge, and so on.

See the data sheet for your specific battery, which will state the recharge voltage and amps

I've heard that for undersized PV arrays, to charge with "set bulk=absorb=float" for cyclic service when charging with PV only, or if your days are too short to complete Absorb.