So a couple of years ago our old faithful, reliable hot water system rusted through. We fount out, much to our disappointment, it was irreplaceable and we had to drop $6.5k on a solar system. Great. Since then we're always running out of hot water in winter, and the hot tap-water is never quite hot enough. *sigh*. But the latest stinker: Hot water electricity costs for mid-winter: $850, Hot water costs for mid-summer: $550 (off peak booster rates) W-T-F! How can this be? Yes the booster is on, but the guys from the solar company said it was all automatic, and if it wasn't needed it would not even turn on. Do you think the solar doo-hickey is broken? Or is this normal?