The Könner & Söhnen KS 3100i S is a compact petrol inverter generator with a stable 230V pure sine wave output for compatible sensitive electronics. It provides 2.8kW rated power and 3.1kW maximum power, with recoil starting, an enclosed housing and an integrated carrying handle for portable use.
Free delivery to mainland Great Britain only.
At a glance
| Rated / maximum power | 2.8kW / 3.1kW |
|---|---|
| Output | 230V, 50Hz pure sine wave |
| Socket | 1 × UK 13A household socket — 230V |
| Starting | Recoil |
| Runtime at 50% load | Approximately 4 hours* |
| Fuel tank | 4 litres |
| Net weight | 21.5kg |
*Fuel consumption and runtime vary with load, fuel quality, weather, altitude and generator condition.
Why choose the KS 3100i S?
- Pure sine wave output: stable 230V, 50Hz power for compatible sensitive electronics.
- Compact enclosed design: integrated carrying handle and a net weight of 21.5kg.
- Economy mode: lowers engine speed at lighter loads to reduce fuel consumption and noise.
- Flexible connections: UK 13A AC socket, 12V / 8.3A DC outlet, USB QC 3.0 and USB Type-C.
- Clear operating information: the LED display shows voltage, frequency and operating hours, with low-oil and overload indicators.
- Parallel-ready: supplied with a parallel cable for connection to a compatible Könner & Söhnen inverter generator.
- Low-noise housing: rated at 63dB(A) at 7 metres.
Power, fuel and connections
Plan your load
Use the 2.8kW rated output for normal load planning and allow for motor starting loads. For prolonged operation, the manual recommends no more than 80% of rated power: approximately 2.24kW.
Petrol operation
Use unleaded petrol rated 90–95 octane with no more than 10% ethanol. The generator is supplied without petrol or engine oil.
Parallel connection
The supplied cable can connect two compatible Könner & Söhnen inverter generators for increased output. Confirm model compatibility and the combined rating before use.
Technical specifications
| Rated / maximum output | 2.8kW / 3.1kW |
|---|---|
| Voltage / frequency / phase | 230V / 50Hz / single phase |
| Maximum current | 13.5A |
| Power factor | 1 |
| AC socket | 1 × UK 13A household socket — 230V |
| DC outlet | 12V / 8.3A |
| USB outputs | USB QC 3.0 and USB Type-C |
| Parallel connection | Yes — parallel cable included |
| ATS input | No |
| Protection class | IP23M |
| Engine | KS 160i, 145cm³, single-cylinder four-stroke petrol, air-cooled |
|---|---|
| Engine power | 4.6hp |
| Starting | Recoil |
| Fuel tank capacity | 4 litres |
| Runtime at 50% load | Approximately 4 hours* |
| Crankcase capacity | 0.45 litres |
| Alternator winding | Copper |
| Generator dimensions (L × W × H) | 480 × 290 × 430mm |
|---|---|
| Packed dimensions (L × W × H) | 510 × 320 × 475mm |
| Net / packed weight | 21.5kg / 23.9kg |
| Noise level | 63dB(A) at 7m / 96dB(A) sound power |
*Fuel consumption and runtime vary with load, fuel quality, weather, altitude and generator condition.
What's included
- KS 3100i S petrol inverter generator
- Parallel connection cable
- Oil filling funnel
- Spark plug wrench
- PH2 screwdriver
- Operating instructions
Engine oil and petrol are supplied separately.
Before first use
- The generator is supplied without engine oil or petrol. Do not start it until the correct oil has been added.
- Use four-stroke petrol engine oil; the manufacturer recommends SAE 10W-30 or 10W-40.
- Use unleaded petrol rated 90–95 octane with no more than 10% ethanol.
- Operate outdoors in a well-ventilated area on a firm, level surface, away from doors, windows and combustible materials.
- Read the owner's manual before starting, and connect appliances only after the engine is running steadily.
Manuals and downloads
Warranty
Manufacturer's warranty: 1 year or 1,000 operating hours, whichever comes first, from the date of purchase.
The warranty covers manufacturing defects, subject to the manufacturer's warranty conditions. Eligible faults may be repaired or the product replaced. Retain your proof of purchase and any completed warranty documentation supplied with the generator.
For help with a warranty claim, contact Energian with your order number, generator serial number and a description of the fault.
Frequently asked questions
Is the KS 3100i S suitable for sensitive electronics?
Yes. Its inverter system produces a stable 230V, 50Hz pure sine wave output. Keep the connected load within the generator's ratings.
Can two generators be connected together?
Yes. A parallel cable is included for connection to a compatible Könner & Söhnen inverter generator. Confirm compatibility and the combined output before use.
Can it run large appliances or power tools?
It can run compatible equipment within its 2.8kW rated and 3.1kW maximum output. Check each appliance's running and starting requirements before connection.
Can it start automatically during a power cut?
No. The KS 3100i S uses recoil starting and does not have an ATS input.
Energian support
For help choosing a generator contact Energian on 020 8064 0335 or info@energian.co.uk. For after-sales support, have your order number and generator serial number ready.