diy solar

diy solar

MillerTech LiFePO4 Batteries

It's now been more than 3.5 years since I've installed my MillerTech batteries, and they continue to work without a single hiccup.
I've discharged 1,622 kWh and charged 1,660 kWh, for a total of 3.28 MWh of cycling! (61,720 Ah cumulative Ah drawn):

Screenshot 2023-07-05 at 10.29.19 PM.png

I performed a capacity test today, from 100% to 4%, and got 184.8 Ah out of the battery. Extrapolating that, it's 192.5 Ah 100% to 0%.
However, the capacity test was performed at higher load than my usual, at 0.38C (1950W). So I expect the battery to yield slightly lower capacity at the higher C rate.

Screenshot 2023-07-05 at 10.27.23 PM.png

Still, I'm still at 192.5 Ah / 200 Ah promised for a new battery, 96.3% SoH!
I continue to be impressed with these batteries. I hope the deterioration stays low, and the batteries are usable for many years go come!
 
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