Has anyone done this? Any success with it if you did or was it a flop?
Solar Tank Instructions
I am really wanting to try it out this winter, cause the extra $80-$100 in electricity per month wasn't fun. Where I'm at it isn't TERRIBLY cold, relative to North Dakota or Canada, but we do regularly get into the teens at night and sometimes into the single digits. Usually highs in the upper 30's, though last winter we did stay below freezing for 9 days straight.