The ST-402n PWM Solar Controller by TECH-STEROWNIKI (Product Code: WG.19.0032) is designed specifically for managing solar collector installations. This advanced controller regulates the operation of the main pump based on temperature readings from both the collector and the accumulator tank. Additionally, it offers the flexibility to connect supplementary devices such as a circulation pump, electric heater, or a signal to the central heating boiler for ignition, making it a versatile choice for solar energy management.

Key features of the ST-402n PWM include a temperature regulation range from +8 to +90 °C and an ambient temperature tolerance of +5 to +50 °C. The device boasts a measurement accuracy of 1°C and is equipped with a 3.15A fuse for enhanced safety. Its robust design allows for a temperature sensor durability ranging from -30 to 180 °C, ensuring reliable performance in various conditions. The large LCD display provides clear visibility, while the high-quality materials used in its construction guarantee longevity.

With the ability to supervise and manage solar systems in up to nine configurations, the ST-402n PWM stands out for its comprehensive protective features against overheating and freezing of the collector. This makes it an essential component for anyone looking to optimize their solar energy system while ensuring safety and efficiency.