If you are talking about the Hopewell Project Solar-Hyrdrogen residence, that actually uses solar energy it does not need to produce hydrogen to store energy. It actually cost $500,000 to build it, house and all, using off the shelf parts. It does run completely off the grid. Their goal is to bring a turnkey system to market for the cost of a midrange car by 2008.
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If you are talking about the Hopewell Project Solar-Hyrdrogen residence, that actually uses solar energy it does not need to produce hydrogen to store energy. It actually cost $500,000 to build it, house and all, using off the shelf parts. It does run completely off the grid. Their goal is to bring a turnkey system to market for the cost of a midrange car by 2008.