The unique innovative phase switching system VTS (Voltage Transfer Switch) allows the generator to be used in both three-phase mode (400 V) and single-phase mode (230 V) without any loss of power. It is no longer necessary to purchase and maintain two separate generators: simply switch the mode and use the TM Könner & Söhnen generator with the phase switching system at the required voltage. There is the option to connect a welding inverter with a maximum current of up to 200 A (in single-phase mode), provided that the welding inverter has an efficiency of 85% and an arc voltage of 25 V. The unique innovative VTS phase switching system (Voltage Transfer Switch) provides the same power for single-phase (230 V) and three-phase (400 V) consumers. Each mode has its own circuit breaker. The KS 10000 series gasoline generators are equipped with a reliable 1-cylinder engine with 18 HP.