Lifepo4 battery in 1990 Lance?

BFL13 wrote:
"With my current RV the two Lithionics 125AH can be at 50% SOC and brought back to 100% SOC in an hour with the Onan generator running versus 3-4 hours with the lead acid batteries at the same SOC level."

Some numbers to play with! :)

That means you can restore 125AH in an hour which means you have a 125 amp charger. Also that the batts get to 100 with no tapering. The Onan gen can run the 125 amp charger.

You would be charging at a 50% charging rate, per LFP specs.

Actually the lead acid batts would take much longer to reach 100% than 3-4 hours. 250AH bank of FLA batts will take a 30% charging rate, so more like 75 amps. In that case from 50% it would take about 30 minutes to get to 65% SOC at 75 amps when amps would then taper for about a 100 minutes to reach 90% SOC

So call it two hours to restore 100 AH (40% of 250) vs an hour to do 125
( about 2 x not 4 x+ in this case.)

It will take maybe 12 hours more to get the FLAs from 90 to 100% so not done on generator.

The claim that LFP are faster charging is true if you have a charger that can do the high amps and a gen with enough VA to run that big charger.

Uhmmm.... this conversation is like ground hog day. I always like when you go into the math of charging lead batteries, it seems it takes aloooonnnngggg time. ;)

I almost believe I could deplete my batteries and charge them twice by the time you had yours done once just using my 2200w generator.