[RE-wrenches] Capacity loss due to rapid discharge
Drake Chamberlin
drake.chamberlin at redwoodalliance.org
Tue Jan 19 10:20:27 PST 2010
Kent,
At 12:34 PM 1/19/2010, you wrote:
>In the tests performed by Dennis Doerffel and Suleiman Abu Sharkh it
>is was in the five to ten percent range.
In the first Excel spreadsheet, posted by Julie Haugh, the loss rates
seem a lot higher than five to ten percent. Using 220 AH battery,
for example, I used a 50 amp discharge rate. The result was that
there would be about 140 AH available. That would amount to a 37%
loss of capacity.
Is it your thinking that this high result is due to the low terminal
voltage at that point, and that the remaining AH would be available
after the battery terminal voltage had a chance to recover? Is the
attached spreadsheet just incorrect?
Thanks,
Drake Chamberlin
Athens Electric
OH License 44810
CO License 3773
NABCEP TM Certified PV Installer
Office - 740-448-7328
Mobile - 740-856-9648
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