E-meters, We Love to Hate it! [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

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>	So....If I'm seeing Ah consumption being replaced at 99% of 
>the charging
>current (as calculated by the E-meter, and by direct observation), what is
>the actual battery efficiency? Sounds to me like 99% of what goes in as a
>charge comes out and is delivered to the load.


If 99% of AH in is going out to the load (sounds very dubious) then 
far less WATT-hours are going out, and that is the true battery 
efficiency -- because the voltage is higher during charging than 
during discharge. Simple!

So, to make a complete statement about efficiency of batteries, you 
need to distinguish between AH efficiency and WH efficiency.

Windy

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