Könner & Söhnen KS ATS 4/25 Inverter Standby Auto Start Unit

The KS ATS 4/25 Inverter is an automatic transfer switch from Könner & Söhnen, designed to seamlessly switch power to a compatible generator during a main power outage and restore it when grid power returns. It features a programmable logic controller for precise operation and supports both automatic and manual modes.

The KS ATS 4/25 Inverter ATS (Automatic Transfer Switch) unit from the German brand “Könner & Söhnen” automatically starts the generator and transfers load to it when the main power source is turned off and automatically stops the generator when the central power supply is restored. It is compatible with the Könner & Söhnen KS 5500iES ATSR inverter generator with integrated 7-pin ATS connector. The ATS unit has a PLC for programming the engine starting time after power outage, the engine warm-up time before connecting power consumers as well as for signaling errors. It has a generator emergency stop button. The ATS unit can operate both in automatic and in manual mode.

This advanced ATS unit ensures uninterrupted power supply by intelligently managing the transition between the main power grid and your generator. Its robust design and smart features make it an essential component for homes and businesses requiring reliable backup power.

Equipped with a programmable logic controller (PLC), the KS ATS 4/25 Inverter allows for customized settings, including precise engine starting times after a power failure and optimal warm-up periods before connecting electrical loads. This ensures smooth and efficient power transfer, protecting your appliances and systems.

Safety and control are paramount with the integrated generator emergency stop button, providing immediate shutdown capability when needed. The unit's versatility is further enhanced by its ability to operate in both fully automatic and manual modes, offering flexibility to suit various operational preferences.

Designed for broad compatibility, the KS ATS 4/25 Inverter features a universal design suitable for both single-phase and three-phase networks. It also includes a battery charging function to keep your generator's battery ready for immediate use, ensuring readiness for any power disruption.

Specifically engineered to work seamlessly with the Könner & Söhnen KS 5500iES ATSR inverter generator, this ATS unit utilizes a dedicated 7-pin control cable connector for reliable communication and synchronized operation, creating a powerful and dependable backup power system.

• Peak Power Demand (Standby): 0.36 W


• Peak Power Demand (Operating): 1.2 W


• Voltage: 230V/400V


• Power (230V): 5.75 kW (11.5 kW max)


• Current (max 230V): 25 A (50 A max)


• Power (400V): 13 kW


• Current (max 400V): 25 A


• Operating Environment Temperature: -10°C to 55°C


• Operating Environment Humidity: ⩽60%


• Storage Environment Temperature: -10°C to 70°C


• Storage Environment Humidity: ⩽60%


• IP Protection Class: IP41


• Insulation Class: AC1.0KV / 1min 1mA


• Maximum Battery Charging Current (Built-in Power Supply): 2 A


• Control Cable Length: 5m


• Programmable Logic Controller (PLC): Yes


• Operation Modes: Automatic and Manual


• Generator Emergency Stop Button: Yes


• Network Compatibility: Single-phase and Three-phase


• Battery Charging Function: Yes


• Control Cable Connector: 7-pin


• Compatible Generator: Könner & Söhnen KS 5500iES ATSR inverter generator