Lithium cost keep dropping!

BFL13 wrote:
Depends! :)

Relion says:

"More Usable Capacity 25-50% more capacity than lead-acid equivalent."

Many say 100% is usable with LFP, but many users here like doing 20-90s for 70% range in real life, so that compares with 50-90s using 6s at 40% range. You could do 40-90s at 50% range with your 6s too.

70 is 30 more than 40 and 30 is 75% of 40.
70 is 20 more than 50 and 20 is 40% of 50.

You also have "inverter usable" vs "furnace usable". The LFP stays above inverter alarm 11v to a lower SOC than 6s do. But you can go lower with the 6s and still run the furnace even though you can't do inverter anymore at that lower SOC.

That last explanation using the inverter and furnace makes a lot of sense and gives some clear context, at least for me.

Our new trailer that arrives in a couple or so months has two x 6 volt AGM batteries mounted under the bed. I had thought of switching it out for a battle born group 31 but I’ll see who’s it goes. The trailer comes with a 1200 watt inverter and is not hooked up to the microwave so I don’t see a huge load from it. Entertainment centre and a plug by the bed seems to be the only thing it’s hooked up to. Kinda wish it was hooked up to the microwave. That may be our first mod. We’ll see how it goes with the AGM’s but I’m not adverse to swapping it out with a battle borne.

Thanks for the explanation.