Varisol M32- Differential Thermostat with Auxiliary Source & Pump Speed Control

Varisol M32 is the appropriate differential thermostat for every solar thermal system which aims to maximize the solar yield under any sun condition.

It drives the pump speed proportionally (PWM) and has an extra output for auxiliary source activation (boiler, electrical source, etc).

If your solar thermal installation consists of a collector field, a double or triple energy hot water store with two or more sensor inputs, and an auxiliary power source such as a boiler this is the adequate controller to select.