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^This. Batteries(containing water especially) should not be allowed to freeze.
If insulated with foam, the shed will probably have to have an interior shell which is resistant to both sulfuric acid and fire, perhaps stainle$$.
There should also be an external shutoff, as well as a diode or two to keep it from backfeeding into the county lines and frying working linesmen during an outage.
Mabye it can be buried below the frost line in a concrete pit with passive vent lines?
Concrete leaches heat from the interior into the 4ft of frozen ground and should be insulated on the outside.
Below that, it is a constant 50deg or so.
Last edited by john70t; 02-20-2012 at 08:04 PM..
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