My pool's solar panel valve actuator is not working any more. The temperature panel lights up but the valve seems broken. It doesn't move and I can't manually adjust the handle. I bought the house a ...
I want to build my own solar water heater. It should heat about 20-30l of water per day to about 60°C. There is about 4-5h of direct sunlight to the place I thought of putting it. How big should my ...