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re: solar panel and 12 volt marine battery??
19 mar 1999
georges wrote:
>nicksanspam@ece.vill.edu wrote:
>>tex wrote:
>>>gerry schneider wrote:
>
>>>c = amp - hours of a battery (charge), correct? example: t-105 is rated
>>>at 225 ah, so 1 amp of solar would be c/225, i assume..?
>
>>true, in the twisted logic of pv cranks.
>
>you've lost me here nick. i do not why you consider this twisted.
c/225 is 1 ah. that's an amp-hour, not an amp. that do why.
c/225a = 1 hour, but why is that interesting?
>the "c" rate is found by dividing the battery capacity in _amp_hours
>by the charge rate in _amps_.
dividing amp-hours by amps gives hours, not amps.
>if i take a 100 amp hour battery and charge it a steady 5 amps the
>"c" rate is 20.
nonono. you may be trying to say it takes 20 hours to charge at a rate of
5 amps, but what's a "c rate"??? how can a "rate" be a certain number of
hours? would you say you were driving to pittsburgh at a rate of 300 miles?
>in fact, the "c" rate is the number of hours to fully
>charge the battery at this charge rate.
a number of hours is not a rate. you might call the total charge time
t in hours, as a function of charging rate i in amps. t = c/i, ideally,
in charging a battery from 0 to 100%.
>what is twisted?
the language, and the logic behind it...
nick
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