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Sand batteries are not a new concept but can be an impressive way to collect extra solar power during the day to heat your home day or night! I will walk through the setup I used to heat a small room and we will take temperature readings through the day and into the night to see the results and how effective a cheap sand battery could be as an emergency heat source.

DISCLAIMER: This video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission.