I have an off grid solar system and I'm playing with it with a Raspberry Pi and an Arduino.
I'm looking for an automatic usage of the 12V power produced when the battery is full. (The Arduino has a sensor for voltage and my Raspberry is ready to do activate/deactivate with relays.)
Here are some ideas I had :
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.)
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.