20P Battery Module Capacity Tests
4 years ago
3
Testing the 3 - 20P battery modules removed from service after 1.5 - 2.5 years of daily use.
Months Start/AH End/AH Loss-%/mo
29 32.8 29.3 0.37
26 35.1 33.9 0.13
18 35.1 32.4 0.43
The average is 0.31%/mo. or around 4%/yr. Testing temperatures may have been different between the 3 modules and affected the results. A sample size of 3 is not good at drawing general conclusions, but it seems the used laptop cells fair as well as the new BAK cells, at least one of those two modules.
More to come...
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Louisiana Fairytale by Austin Rogers
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