Thermann Aestiva 3 Sensor Solar Controller (includes free thermal heat paste) related-senztek-1-2-solar-hot-water-sensor-controller-pump-station it may be easier to

it may be easier to replace all the Heavenly Solar components with a complete pump station

Everhot 50L only domestic electric water heaters thermostat

this 2-3 model is often the safest replacement option

The element can also be set to operate at times that best suit the household's needs

Thermann Aestiva 3 Sensor Solar Controller (includes free thermal heat paste) related-senztek-1-2-solar-hot-water-sensor-controller-pump-station it may be easier toThermann Aestiva 3 Sensor Controller (includes free thermal heat paste) Solar Hot Water Parts includes heat transfer paste and joiners with this controller. Controller includes: 1 x 20 roof sensor 2 x tank sensor Thermal heat paste included for roof sensor installation Overview Designed in Australia for Australian conditions. Comes with most features and end user adjustability. All connections are plug and play. Features Fully digital LCD display