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Over the years I have successfully engineered and built several grid-down solutions using an inexpensive solar system and old car batteries. These 12 volt DC systems include:
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- A walk-in food-storage "fridge" that uses outside cold air and a small fan - not very cold in the summer
- An automatic ceiling fan that moves wood stove heat into the existing furnace vent system
- A cheap way to keep your internet and Wi-Fi uninterrupted when the grid goes down
- A $35 pump that puts your water storage into your full-house plumbing
- A cheap way (about $30) to fire up your fridge and freezer from your stand-alone generator without spending hundreds of dollars on a commercial switch
- A $180 furnace system that will at least keep your pipes from freezing
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