Engine Generator Könner & Söhnen KS 4000IEG S 3500 W 12 L LPG Petrol

The Könner & Söhnen KS 4000IEG S inverter engine generator provides a rated output of 3500 W and a 12 L fuel tank, operating on both petrol and liquefied petroleum gas (LPG). Designed for compact portability at 40 kg, this model delivers a pure sine wave 230 V / 50 Hz output suitable for sensitive electronics. The unit features a microprocessor-controlled inverter, a brushless alternator with 100% copper winding, an ergonomic control panel with LED display and multiple output ports, and a 3-in-1 engine start that integrates fuel valve, choke and electric start. The generator supports Economy mode for reduced fuel consumption and can be connected in parallel with a compatible unit to increase total output.

Advantages

The KS 4000IEG S produces a stable pure sine wave output which protects sensitive devices and ensures reliable operation of household and professional equipment. Dual-fuel capability (petrol and LPG) adds flexibility and can lower operating costs when LPG is available. The brushless alternator with copper winding and a EURO V–compliant engine provide durable, long-term performance. Economy mode reduces fuel consumption at low loads, while a low-noise protective housing keeps operating sound near 66 dB. An ergonomic control panel with LED display, USB ports and a 12 V socket simplifies monitoring and connection of multiple devices.

Suitable for

• Powering home appliances during outages (fridge, lights, communication equipment)
• Outdoor activities and camping where a stable AC source is required
• Construction sites and workshops for tools and cordless charger stations
• Mobile or remote installations that benefit from LPG or petrol fuel options
• Parallel operation to increase available power for larger loads

Key specifications

• Rated output: 3500 W
• Output waveform: pure sine wave, 230 V / 50 Hz
• Fuel type: petrol and LPG (propane-butane)
• Fuel tank capacity: 12 L
• Noise level: approximately 66 dB at rated conditions
• Engine features: EURO V–compliant, Economy mode for reduced consumption
• Alternator: brushless design with 100% copper winding
• Control panel: LED display, two USB ports (5 V/1 A and 5 V/2.1 A), 12 V socket, Economy mode switch, status indicators
• Start system: 3-in-1 (fuel valve, choke, electric start)
• Mobility: two wheels and folding handle for transport
• Parallel connection: compatible with parallel unit for increased combined output

How to use

Before first use, check oil and fuel levels and read the user manual for safety instructions. To run on petrol, fill the petrol tank and set the 3-in-1 switch to the petrol position; then use the electric start or recoil as provided. To run on LPG, connect the supplied hose and pressure reducer to a certified LPG cylinder following local regulations, set the switch to gas, and start the engine. Use the LED display to monitor operating parameters and the Economy mode switch to reduce fuel consumption at low loads. For parallel operation, make sure both generators are compatible and the parallel unit is fitted according to the manufacturer’s instructions.

Usage recommendations

Operate the generator outdoors or in well-ventilated areas only, keeping exhaust fumes away from occupied spaces. Have LPG connections installed or inspected by a certified specialist and ensure supply pressure does not exceed 16 bar. Use Economy mode when powering light loads to extend runtime. Perform regular maintenance: check oil, air filter, spark plug and connections according to the service schedule, and store the generator dry and protected when not in use.