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Old 06-18-2014, 11:08 AM   #61 (permalink)
Daox
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I really doubt thats enough capacity. A quick google search gave me this: Amp hours to Farads conversion

Quote:
1 Farad is 1 Ampere second per Volt. 1 F = 1 As/V.
1 Ah = 3600 As
3600 As / 12V = 300 As/V = 300F
But you need more then that because the voltage will drop as the capacitor discharges. Half the charge means half the voltage.
With a lead acid battery that's different. A battery that is half empty still has nearly the same voltage as it had at the start.
Maybe 600F and some electronics to automatically step up the voltage so it stays at 12V.
So you'd need to buy 160 capacitors with 3V and 60F each.
So, it looks like you have a 10Ah of capacity, but it will not maintain the voltage you need to start the vehicle. So, you more realistically have maybe... 2Ah of usable capacity.

Putting them in parallel with a small lead acid battery might be a nice combo though.

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