Its primary function is to monitor water storage temperatures and automatically engage a backup electrical heating element when solar energy alone isn't enough to heat the water to your desired temperature
The unit connects to high-precision temperature sensors installed inside the solar water tank. It constantly measures and displays the real-time temperature of the water on its digital LCD screen.
2. Backup Heating AutomationWhen the water temperature drops below your configured threshold, the controller serves as a brain to switch on the backup electrical booster element: