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Sam
Joined: 18 May 2008
Posts: 135
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nuckolls.bob(at)aeroelect
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 Posted: Sat Jan 03, 2009 4:56 pm Post subject: Battery capacity checker |
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At 05:22 PM 1/3/2009, you wrote:
Pretty slick. This is an extension of an idea I published
in the battery chapter of the 'Connection way back when.
A reprint of that idea was excerpted about 10 years ago
and published at:
http://www.aeroelectric.com/articles/battest.pdf
The idea discovered by Sam is interesting in that it
takes advantage of the end-of-discharge detection
feature built into many inverters (usually 100W or
greater). It also has the advantage of choosing
combinations of 120 volt bulbs for sizing load
as opposed to 12 volt devices.
As one reader suggested in the comments under the
posting, one should probably put a good ammeter
in series with the DC power leads to the inverter
and then adjusting the number and size of lamps to
achieve the desired load on the battery.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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[quote][b]
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brianrobertwood(at)gmail.
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| Posted: Sat Jan 03, 2009 5:48 pm Post subject: Battery capacity checker |
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Shouldn't you have to take into account the effciency of the inverter
also, to get usable results?
Brian in Brazil
Em Sat, 03 Jan 2009 22:54:00 -0200, Robert L. Nuckolls, III
<nuckolls.bob(at)aeroelectric.com> escreveu:
| Quote: | At 05:22 PM 1/3/2009, you wrote:
> I stumbled across this home brewed battery capacity tester, using a
> power inverter. Neat idea.
>
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nuckolls.bob(at)aeroelect
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| Posted: Sun Jan 04, 2009 8:09 am Post subject: Battery capacity checker |
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At 07:44 PM 1/3/2009, you wrote:
| Quote: |
<brianrobertwood(at)gmail.com>
Shouldn't you have to take into account the effciency of the inverter
also, to get usable results?
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Not necessary. You set the load (numbers and sizes of
light bulbs) to achieve the desired LOAD ON THE BATTERY.
You're correct that lamp loads will be less than battery
load due to inefficiencies in the power conversion process . . .
That's why you set it up with the DC ammeter.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
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