SilverStar wrote:
Not to derail the thread, but gravity/kinetic energy have a lot of potential. I was thinking about a micro-hydro unit, hooked up to the water line running into my house. Wonder if this would work, or if it's even legal?
Well, you likely can't legally tap the main until you are on the interior plumbing. And you probably can't legally connect your internal power source to the mains. You might be perfectly legally setting up parallel circuitry so that main power fed, say, your appliances and that your micro/hydro power fed your lights.
But the greatest problem would be that you don't have steady flow through your plumbing--you only generate power when the water is moving in the pipes. So unless you have your taps open all day (and you pay for your water, accordingly) you probably don't harness enough energy to power anything.
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--James