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by ansible
4636 days ago
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Good, cheap, reliable? Not that I know of. Mounting costs are higher too; you something like a post in concrete to attach the panel, rather than just screw it to your roof. People are still working on that sort of thing. An interesting system I saw a few years back was one based on the sunlight heating up a fluid. The fluid (maybe it was a gas) expands a cylinder that keeps the panel pointed at the sun. At night, the fluid cools, and the system resets to its default state, pointing east for the next day. So 100% mechanical, without any active control. |
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