Can somebody confirm that Altamont is now on-grid? Personally, I think that the best available solution to the intermittent nature of wind and solar power is pumped hydroelectric storage. It is reasonably efficient, and can use existing facilities. A lake that is silting in can still be dredged to give full performance for a few days at a time. If I build off-grid, I plan to hook my windmill to a water pump, and a generator to a pelton wheel, but I'll move that to the house forum.
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There is no excuse for a land vehicle to weigh more than its average payload.
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