time2roll wrote:
More usable capacity. Full amps to 90%
If it stayed at constant 56.5 amps till 90% SOC instead, that would take 0.354 Hr or 21 minutes to do the 80-90 instead of 30 minutes as happened. Saving = 9 minutes.
(I can do the constant amps with the PowerMax 55 amper. It happens to run at 56.5 steady off the portable generator. It runs, but at lower amps off 120v below 105v. I had to get out the gen at home to do the test because of the long cord from the stick house to the camper made for low 120 with the converter on.)
"Usable" is hard to define.
I found that "usable" capacity for the case of running the inverter at high loads is when 90 amps at 50% SOC makes the inverter alarm, so that is almost 1C (the way I do that). At less of an inverter load you can go below 50% of course without inverter alarm. How low? Depends on the load amount.
I don't know how low you can go doing ordinary loads that will still run at lower voltages. DW came back with the one batt at the time at 20% SOC and things still worked, but those things pull low amps. Same as with FLA to a degree. Not as low as LFP with their slightly higher Voltage per SOC than SiO2's (which is higher than FLA and some AGMs)
How dim can the lights get and how slow can the fans go before you declare they are un-usable?
At least there is no BMS cutting you off completely. Yipes!
Anyway it is what it is. IMO they are sort of like the Stark brand AGMs I had back when, only with the high amp discharge thing added in.
I won't be cycling them enough times down to zero to see if they really last as long as the ads say. I doubt they will hardly ever get below 40% the way we operate.