LifePo4 Charge Performance

pianotuna wrote:
Steve,

I was talking about zero volts. Not a "capacity" discharge.

Capacity discharge is a "moveable feast". If you set capacity at 20% of the total then you get a whole bunch more "cycles".

The other factor is "how much remains".

The industry considers batteries "done" when they only produce 80% of their usable amp-hours.

In my case, with telecom jars, "usable" capacity is 278 amp-hours and 80% still allows me 222 amp-hours. That's more than most RV's come from the dealers with.

The reason I want a high capacity bank is to be able to run an O2 concentrator overnight. I refuse to run a generator while sleeping. Assuming I have only 2.67 Kwh--I can't come close to running the concentrator all night.

That turns me into a power pole princess.

BTW the O2 is not for me--but for my partner.

you cant take a sio2 to 0 volts and expect that life cycles that spec is for 100% depth of discharge thats not the same as 0 volt by a long shot.

rated specs are not a movable item, I am not talking about a number of amps but rather a dept of discharge in a % of the batteries rating. this is a direct coralation from voltage to 5 remailing that is for a certian type of battery.

I just looked at them on azmuth solar and no where does it say 0 volts, if you have some lititure that spicificly says recovery from 0 volts I would love to read that as I would find it amazing. 0 volts in an agm or La will filp cells and do all kinda of nasty things. 100% depth of discharge would be 10.8V or 11.1V depending on which format of sio2 you have. which I doubt you would ever get to anyways as your inverter would be shut down long before you reach that voltage. that is the biggest benifit of Li when it comes to inverters they start out at 13.6V for 100% and at 14% they are still 12.5V so you can use more of your capacity for the inverter with out alarms and shutdown.