Lifepo4 float setting?

time2roll wrote:

BFL13 wrote:
Everyone knows that the charging efficiency of LFPs is 99% while it is only 94% for FLAs

The real difference is the last 20% or 30% when FLA is tapering amps and LFP is putting all available solar into the battery.

And since FLA starts at 50% only half the power goes in direct at full current. (50% charged to 75% charged) YMMV depending on size of solar and battery.

Well FLA taper- starting SOC depends on the charging rate so at 20% that would be at about 80% SOC but at 10% it would be more like 90% SOC for end of constant amps. For sure it would be in the higher 90s for LFP.

With solar, amps are tapering all afternoon from the sun getting lower, so very hard to tell if amps are tapering from that or from reaching Vabs . And with the lowering sun making fewer amps in the afternoon that is less of a charging rate and even higher SOC before amps taper from that.

On solar doing shallow cycles with FLA getting to Full most days in the afternoon, I found it hard to tell which was making amps taper more at the high SOCs.

So the time difference where amps are tapering with FLA vs LFP on solar is not so many minutes at typical RV low solar charging rates. That still leaves their charging efficiency differences though at say 5% faster for LFP

I think the big advantage for LFPs is the allowed high discharge rates so you can run high amp things on inverter even at a lower SOC with a smaller size bank such as for a smaller RV.