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re: amp hr help ?
29 apr 1999
c. david johnson wrote:
>if your unit draws 50 amps per hour...
...you can be sure it's being described by an ignorant "professional" who
doesn't realize this is like talking about miles per hour per hour or
gallons per minute per minute. amperes already measure the time rate of
charge flow in coulombs per second, so adding "per hour" makes no sense.
talking about amps of current flow does makes sense.
>the system i have has a 1540 ah battery pack or 18.4 kw a day
ditto. yes, batteries can store ah, but not "kw per day." watts already
measure the time rate of energy flow in joules per second, so adding
"per day" makes no sense. talking about kwh/day or kw-days makes sense.
>on your re charging of the batteries you should plan on atleast 1.5
>times the output. so in may case 1540 * 1.5 = 2310 amps input per day
in spades. what is "1.5 times the output"? it makes no sense to talk
about "amps input per day." amp-hours per day might make sense.
we are here to help you, david. it is our fondest hope that you will
someday be able to open your mouth without uttering nonsense.
nick
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