Hi Ken,
The main problem you would have would be power consumption. My propagator is a 150w cable at 240v that works out at 0.625A. The same thing (assuming you could source a 12v one would consume 12.5A so I guess you are in the realms of heavy duty batteries which are expensive or inverters which are inefficient and expensive.
An alternative method would be to use a radiator in a frame insde the greenhouse to capture the heat and then use microbore copper tubing and a large sand box to act as a heat store, this is probably not very efficient either.
I think the best alternative would be a hot bed then you could recycle the whole lot in the garden come the end of spring
__________________ ntg Never be afraid to try something new.
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Last edited by nick the grief; 13-02-2007 at 01:33 PM.
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