Trevmar, you should do an article for Morganatica on batteries. My attempt after years of taking care of ship's batteries has stalled for the present...
Peter, splendid idea
(I did use a paraffin space heater in the garage a few years ago but the clean, low odour fuel doesn't seem to be available locally any longer)
Main use of the water is to mix with antifreeze so I don't use tap water in cooling systems...
Cheers,
