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Re: (ET) Fully charged pack voltage

In my experience, the onboard ge charger takes my newish T-105's up to 44-45v over an 18 hour cycle, the last 3-5 hrs between 44.4 and 45v for cell equalization.  End the charge cycle and in a short time the voltage settles back to 39v.
Jack
On Apr 23, 2009, at 8:13 AM, Michael S Briggs wrote:


I just got a nice new pack of Trojan T-605s (slightly lower capacity than T-105s, with a proportionately lower price). I'm trying to figure out what the voltage of a fully charged new pack *should* be, and I have seen very different things as skimming through the archives.
My understanding is that the chemical reactions taking place in a lead-acid cell produce a potential difference of 2.13 Volts, so a fully charged lead-acid battery measured with a very high impedance voltmeter should measure that 2.13 Volts per cell, or 6.39V for a 6V battery, and 38.34 V for a 36V pack.
But, I have seen statements in the archives saying that a fully charged pack should have a voltage of 42V or so (various posts saying anywhere from about 40V up to 44V).

Thanks,
Mike

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Michael S. Briggs, PhD
UNH Physics Department
(603) 862-2828
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