In that case you did great :) I have often thought about making my own little water tower battery. The solar would pump water into a large elevated container. At night the container slowly drains and runs an alternator to provide "battery power".
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a few pallets and 50 gallon drums could be enough to run the lights and more at night.
That'd be a sweet setup! I wonder how much energy a large cistern could supply. You could effectively get a small amount of energy from rain water.
True. I think the higher up your container is the more energy you can store with the same amount of water. of course it takes more energy the higher you need to pump the water. If there is some sort of hill or cliff you have access to then you could use that for elevation.