trojan battery cycle [RE-wrenches]
Jay Peltz, Peltz Power
jay at asis.com
Wed Feb 13 08:57:31 PST 2008
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Hi Jamie,
I have heard other battery manufactures use a 2% current rate to end
absorb charge.
( 400 amp hr battery X 2% = 8 amps)
What do you think about this vs a set time for absorb?
thanks,
jay
peltz Power
On Feb 13, 2008, at 8:51 AM, James Surrette wrote:
>
> Hello William,
>
> A quick note from the battery supplier side.
>
> We've noticed, as battery banks capacity has increased, an increase
> in deficit cycling and an increase in the need of "corrective"
> equalizations. However, a quick calculation that we've been
> providing, which has shown good success;
>
> i) At bulk voltage - assume battery at 80% SOC
> ii) Take 20hr rate capacity and determine AH of remaining 20% deficit.
> iii) Divide AH deficit by the "average" charge current during the
> Absorb cycle - not an exact science I know.
> iv) Provides a more accurate required absorb time - and often
> surprised the client when 4+ hours are required.
>
> EQ duration can be calculated in the same fashion.
>
> Regards,
>
> Jamie
>
>
>>>>
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