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Direct Solar Power: Off-Grid Without Batteries
(solar.lowtechmagazine.com)
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A lot of great ideas in here for sure! Better insulation is a great way to store energy without the need for large battery systems. This kind of thinking can also translate really well to more traditional housing.
We already do this kind of thing with standard water heaters in the US, and creating better insulated chest freezers and refrigerators should be straightforward. The cooker seems fairly novel, though.
On a larger scale, Passive Haus construction techniques can go a long way to reducing energy needs for climate control, and would make it easier to turn off climate systems when the sun goes down.