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Discussion Starter #1
I've been building a rear, lower, "luggage" carrier for my Sparrow.
This is to carry a small generator as a range extender. (Kipor KGE 3000).
One thing I realized was that I might be able to get the same range
extending with a lightweight battery pack. Since this is in addition to
the normal Sparrow Optimas, I don't have to worry about fitting the
odd-sized battery boxes. I'll have something like an 18" cube of space
to work with.
I don't need Power for acceleration, 2KW continuous draw should be ok.
Pretty much any voltage is ok, as I'd be using my PFC40 as the DC-DC to
transfer the power to the Optima pack.

So, is there any battery that could store at least 2 kwh, fit in about
3+ cu ft, and put out 2 kw of power?
And how ridiculously expensive would it be?

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Discussion Starter #4
John G. Lussmyer wrote:
> So, is there any battery that could store at least 2 kwh, fit in about
> 3+ cu ft, and put out 2 kw of power?
> And how ridiculously expensive would it be?

Heck, even a few T-105 golf cart batteries can do this! They are good
for 6 volts x 100 amps x 1 hour = 600 watthours at the 1-hour rate, so 3
of them gives you 2 KWH at 2 KW. Size is only 21"w x 10"l x 11"h = 1.33
cu.ft. Costs maybe $250.

--
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
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Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

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Discussion Starter #5
Lee Hart wrote:
> John G. Lussmyer wrote:
>
>> So, is there any battery that could store at least 2 kwh, fit in about
>> 3+ cu ft, and put out 2 kw of power?
>> And how ridiculously expensive would it be?
>>
>
> Heck, even a few T-105 golf cart batteries can do this! They are good
> for 6 volts x 100 amps x 1 hour = 600 watthours at the 1-hour rate, so 3
> of them gives you 2 KWH at 2 KW. Size is only 21"w x 10"l x 11"h = 1.33
> cu.ft. Costs maybe $250.
>
>
But the WEIGHT is pretty bad. My genset only weighs about 60lbs with fuel.
The Wh/Lb for Golf cart batteries isn't very high.

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