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On 26 Nov 97, Toby Erkson wrote: > Hmm, not a bad idea, sounds sane to me... Can anyone shed some brighter light > on this subject? Specifically, the current draw required for a 12v motor and > suppliers of such compressors (and related A/C parts?). Any other "things you > should know"? The engineering is easy, and quickly sobering. If we assume the same load as a small window unit, that would be, maybe 7 amps at 120 VAC. That's 840 watts. Converted to 14.4 V gives a steady current draw of about 58 Amps, plus a few for conversion losses. 65 A is probably a possibility, 85 is a certainty. Most of the uncertainty comes in the original 7 A assumption, but I believe that is already low if anything.. Then perhaps you would like a bit left over for the rest of the car? ;-) At least this comes out about an order of magnitude more likely than the electric heater idea that keeps coming up. JIm --------------------------------------------------------------------- Melissa Kepner Jim Adney Laura Kepner-Adney jadney@vwtype3.org Madison, Wisconsin ---------------------------------------------------------------------