Using a combination ESP32 and ATtiny to both control the heater ... even more home energy savings than solar alone provides on paper. Effectively the water heater becomes another type of battery ...

Passive solar water heaters are known for their reliability, cost-effectiveness and durability, but don't allow for some of the finer control of active systems. Integral collector-storage systems ...

It all starts with the flow control valve, which, as the name suggests, is a device (automatic or manual) that controls the flow of the pool water. As part of the solar heating system, the flow ...