The Könner & Söhnen KS 3100iG S is a compact dual-fuel inverter generator that operates on petrol or LPG. It provides a stable 230V pure sine wave output for compatible sensitive electronics, with 2.8kW rated power and 3.1kW maximum power on petrol. Its enclosed 22kg design, recoil starting and integrated carrying handle make it practical for mobile work, camping and light backup use.
Free delivery to mainland Great Britain only.
At a glance
| Rated / maximum power on petrol | 2.8kW / 3.1kW |
|---|---|
| Rated / maximum power on LPG | Approximately 2.52kW / 2.79kW* |
| Output | 230V, 50Hz pure sine wave |
| Socket | 1 × UK 13A household socket — 230V |
| Starting | Recoil |
| Petrol runtime at 50% load | Approximately 4 hours** |
| Petrol tank | 4 litres |
| Net weight | 22kg |
*Calculated from the manufacturer's stated 10% reduction in output on LPG. **Runtime varies with load, fuel quality, weather, altitude and generator condition.
Why choose the KS 3100iG S?
- Dual-fuel operation: choose petrol or LPG according to availability and your setup.
- Pure sine wave output: stable 230V, 50Hz power for compatible sensitive electronics.
- Compact enclosed design: integrated carrying handle and a net weight of 22kg.
- 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: compatible with the separately available KS PU1 parallel unit.
- Low-noise housing: rated at 63dB(A) at 7 metres.
Power, fuel and connections
Plan your load
Use the rated output and allow for motor starting loads. For prolonged operation, the manual recommends no more than 80% of rated power: approximately 2.24kW on petrol or 2.02kW on LPG.
Check your LPG setup
An LPG hose with pressure reducer is supplied. Check cylinder connection compatibility before use; a suitable adapter may be required. Follow the manual's leak-check procedure and never operate on petrol and LPG simultaneously.
Parallel connection
The generator has a parallel connection port. The current product artwork specifies that the KS PU1 parallel unit is sold separately; confirm the complete compatible setup before purchase.
Technical specifications
| Petrol rated / maximum output | 2.8kW / 3.1kW |
|---|---|
| LPG rated / maximum output | Approximately 2.52kW / 2.79kW* |
| 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 — KS PU1 parallel unit sold separately |
| ATS input | No |
| Protection class | IP23M |
| Fuel | Petrol / LPG |
|---|---|
| Engine | KS 160i, 145cm³, single-cylinder four-stroke, air-cooled |
| Engine power | 4.6hp |
| Starting | Recoil |
| Petrol tank capacity | 4 litres |
| Petrol 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 | 22kg / 24.6kg |
| Noise level | 63dB(A) at 7m / 96dB(A) sound power |
*Calculated from the manufacturer's stated 10% reduction in output on LPG. **Runtime varies with load, fuel quality, weather, altitude and generator condition.
What's included
- KS 3100iG S dual-fuel inverter generator
- LPG hose with pressure reducer
- Oil filling funnel
- Spark plug wrench
- PH2 screwdriver
- 12V battery charging clamps
- Operating instructions
Engine oil, petrol, an LPG cylinder and the KS PU1 parallel unit 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.
- For LPG operation, check the hose, reducer and cylinder connection before starting. Use a suitable adapter where required and follow the LPG commissioning guide.
- Never operate on petrol and LPG simultaneously.
- Operate outdoors in a well-ventilated area on a firm, level surface, away from doors, windows and combustible materials.
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
Does it produce the same power on LPG?
No. The manufacturer specifies a 10% reduction in output on LPG. Plan the connected load around the fuel being used.
Is an LPG cylinder included?
No. An LPG hose with pressure reducer is supplied, but the cylinder is not included.
Is the KS 3100iG 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. The generator has a parallel port, but the current product artwork specifies that the KS PU1 parallel unit is sold separately.
Can it start automatically during a power cut?
No. The KS 3100iG 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.