I have an off grid solar system and I'm playing with it with raspberry pi and arduino.
I'm looking for an automatic usage of the 12V power produced when the battery is full. (arduino have sensor for voltage and my raspberry is ready to do activate/deactivate with relays.)
Here are some ideas I had :
1 - Use a water pump to store water as potential energy 6 meters high and convert it later to power with a water turbine. (Seems really inefficient and too much investment into nothing.)
2 - Use peltier systems to convert electricity into water for later usage. (Dehumidifier) - Didn't try yet.
What do people do usually ? - I can't sell it back to the grid, I'm not connected to it.