Each "battery" is 45 AH @ 24 Volts.
Wired in parrallel I had 4kwh of storage, now I have 6.
I had 8 x 6 volt 330 AH lead acid batteries wired in series for 15.3 kwh @ 24 volts.
The beauty of Lithium is you can draw down to 20% of the tank vs. a regular battery which you'd kill rather quickly if you go below 80%. So with the initial 8 batteries (that I could only draw down by 20%), I had 3.6 kwh to utilize. BUT......you really don't want to play down there too often. With the Lithium batteries with 4kwh I can draw down 80% of the capacity...thus 3.2 usable khw.
These are Gen1 batteries, already 2 gens old. These are technically as advanced as an 11 year old laptop. These should last me another 8 years but I'm waiting for LiFePo to come down, (it already has by 50% in recent years), or the "next big thing".
But while technically and physically "old" (2013), the demand on these batteries is minor compared to what they had to do in a car. Fans, defrosters and passenger cabin heat all came from the batteries...all power killers as there is no hot radiator fluid to draw the heat from....it's like a toaster, blow dryer or electric space heater.
That is why they have this big of a pack.
My next upgrade this spring is a better BMS to keep the cells balanced.
This is one of the better ones out there.
Rated Capacity (0.2C): 100Ah / 2560Wh Cycle life: 2000+ cycles at 80% discharge depth Rated voltage: 12.8VCharge voltage: 28.4V - 28.8VDepth of Discharge (DoD): 100%Standard charge current: 30ACharging time: Approximately 4 hoursMax continuous charge current: 50AMax continuous discharge current...
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