Best Rv batteries

Almot wrote:

Itinerant1 wrote:

Last thing when advising to use 90-30% or 80-20% or whatever % how about putting that in voltages I'm curious to see what you would actually set your parameters to. We are talking about Lifepo4 cells so it should be easy to figure this.
*If* you have perfectly matched cells.

To whatever the curve says it's 30 or 80% for your particular battery. Perfectly balanced at 80% they may or may not be, depends on (usually undisclosed) behavior of particular BMS.

Okaaayy...I'll give you a rough idea though, 80% is roughly 3.45v (13.8v) & 30% roughly 2.95v (11.8v).

This is using 3.65v (14.6v) as 100% seeing that no one recommends going over that and you see dropins using 14.4-14.6v as the balance voltage which also reset the 100% capacity display. Which I think we agree is a little high with no benefit.

I've been using 14.1-14.2v (87-90%, "my 100%" on the display) which keeps the cells fairly close in balance and enough to reset the SoC to match the batteries. The lowest I've seen and recorded after 3-4 days of living off the batteries is 3.20v (12.8v) with the inverter showing 12.5v drawing 144a. That would be 55% of battery bank but my SOC showing 30%.
I'm comfortable with that depth of Disharge before I start thinking of hooking the generator up if no sun is in the forecast.

Using roughly 40% capacity of the bank and staying out of the shoulders/ knees is still easy in an fractional C life of rv living.