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Könner & Söhnen 5500W Portable Inverter Generator | Gasoline, Electric Start, CO Sensor | KS 6000iES CO

Könner & Söhnen 5500W Portable Inverter Generator | Gasoline, Electric Start, CO Sensor | KS 6000iES CO

Q: Can it back up my house?

It can power essential circuits through a manual transfer switch or interlock — fridge, furnace blower, sump pump, lights, and electronics. It&#39;s not sized to run central AC plus your entire home at once; plan your load.

Q: How loud is it?

58 dB at 23 ft/7 m (at 25% load) - below the level of a normal conversation, and much quieter than open-frame generators of the same power.

Q: Will it run sensitive electronics?

Yes. The pure sine wave inverter delivers clean, wall-quality power, safe for laptops, TVs, and equipment like CPAP machines.

Q: What's in the box?

The generator, owner&#39;s manual, spark plug wrench, PH2 screwdriver, and an oil funnel. (Note: no oil or gas included — add 10W-30 or 10W-40 before first start.)

Available

$1,099.00$1,399.00

Specification

Voltage, V:	120V/240V 30A
Starting watts, W:	5500
Running watts, W:	5000
Engine start:	Recoil/Electric
Outlets:	2 x 20A, 1 x 30A (120V/240V)

Benefits

REAL POWER, CLEAN POWER: 5,500 starting watts / 5,000 running watts from a 9 hp K&S engine, delivered as a pure sine wave at less than 3% THD - clean enough for laptops, TVs, and a CPAP, strong enough for power tools and a well or sump pump.
STARTS WITH ONE TAP: push-button electric start with recoil backup, plus a 12V charging port to keep the starter battery topped off. No yanking a cord in the cold or the dark.
CONVERSATION-QUIET FOR ITS CLASS: 58 dB at 23 ft/7 m (at 25% load) inside a fully enclosed soundproof housing - below the level of a normal conversation, and far quieter than the open-frame generators in the same 5,000W range.
BUILT-IN CO SAFETY SHUTOFF: An automatic carbon-monoxide sensor shuts the engine down if CO climbs to a dangerous level, alongside low-oil and overload protection. (Always run it outdoors - see safety note.)
BACKED IN THE U.S.: German-engineered K&S build with 100% copper alternator windings, 3 year limited warranty term upon registration, and U.S.-based service and parts support you can call directly.

Delivery

Free Shipping (2-4 business days): Orders over $50 – Free
Standard Shipping (2-4 business days): Orders under $50 – $12.95
We do not ship to California.

Payment

We offer a wide range of secure and convenient payment methods, including:

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Könner & Söhnen KS 6000iES CO gasoline inverter generator with a promotional free gift: the KS JSP-2000 portable jump starter

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Features

The KS 6000iES CO delivers dependable home-backup power with a CopperCore copper-wound alternator, push-button electric start, pure sine wave output (<3% THD), and a built-in CO safety shutoff. At 5,000 running watts it keeps the essentials on through an outage - fridge, furnace blower, sump pump, lights, and every phone and laptop in the house - without the roar of an open-frame generator. Clean and quiet enough for the jobsite, the tailgate, or the campsite, too.

CopperCore Brushless Alternator

A brushless permanent-magnet alternator wound with 100% copper - not the cheaper copper-clad aluminum you'll find in budget units. Copper runs cooler and handles sustained heavy loads without fading, which is exactly what you want when the generator is carrying your house for hours during an outage. Compact, sealed, and built to hold output steady load after load.

K&S 223cc Engine with CO Safety Shutoff

The proprietary K&S 240i-1 engine (223cc, 9 hp, single-cylinder four-stroke) is built for long, steady runtime and meets current U.S. emissions standards, so it burns cleaner and quieter. An integrated CO sensor watches carbon-monoxide levels around the unit the whole time it runs and shuts the engine off automatically if CO gets dangerous. Think of it as a backstop - not a license to run indoors.

Eco Mode

Flip on Eco Mode and the engine speed drops to match the load instead of running flat-out. At lighter loads that cuts fuel use by up to 50%, stretches your tank, and drops the noise even further. During a multi-day outage, that's the difference between one gas run and three.

Pure Sine Wave / Clean Power

A microprocessor-controlled inverter holds the output to a clean 120V/60Hz sine wave — the same quality of power that comes out of your wall. That's what lets you plug in a laptop, a flat-screen, a game console, or medical equipment like a CPAP without the flicker, buzz, or risk you get from a rough-power generator.

Soundproof Housing

The fully enclosed housing brings it down to 64 dBA at 23 ft — conversation-level, and a different world from the open-frame units that force your neighbors indoors. Built-in handle and wheels mean one person can move it from the garage to the driveway without a fight.

6-in-1 LED Command Panel

One clear display shows output power, voltage, frequency, fuel level, and total run hours at a glance — plus warning indicators for CO shutoff, CO-sensor fault, low oil, and overload. The panel also gives you two 120V 20A outlets, the 120/240V 30A outlet, a 12V automotive socket, and a QC 3.0 USB-C port with a protective cover.

What it runs?

5,000 running watts covers a lot - but manage the load, don't run it all at once:

Home backup: fridge + freezer, furnace or AC blower, sump or well pump, lights, router, and your devices. Wire the 120/240V 30A outlet to a manual transfer switch or interlock and you're powering essential circuits, not just extension cords through a window.
Jobsite: clean, steady power for corded tools, chargers, and lights — the pure sine wave protects battery chargers and electronics on site.
RV & outdoor: great for tailgates, camping, and RV power with the correct 30A adapter for your rig.
Storm season: electric start and Eco Mode make it easy to live with through a multi-day outage.

12V DC 8.3A

AUTOMOTIVE

2 x 120V AC 20A

120/240V AC 30A

Eco Mode

Reduces fuel consumption by up to 50%

QC3.0 Type-C

Ports with Cover

Battery Charging Port

Ground Terminal

DC Circuit Breaker

AC Circuit Breaker

Overload Reset

LED Display

Power Output, Fuel Level, Runtime, Voltage, Total Runtime, Frequency, CO Sensor Failure, Carbon Monoxide Shutoff, Low Oil Alarm, Overload Alarm, Output Indicator

Specification

Könner & Söhnen 5500W Portable Inverter Generator | Gasoline, Electric Start, CO Sensor | KS 6000iES CO

Voltage, V	120V/240V 30A
Starting watts, W	5500
Running watts, W	5000
Frequency, Hz	60
Current (max), A	23
Outlets	2 x 20A, 1 x 30A (120V/240V)
Engine start	Recoil/Electric
Fuel tank volume	2.9 gal. (11L)
Carbon monoxide shutoff	+
LED display	Output power, frequency, voltage, working hours, fuel level; CO sensor failure, carbon monoxide shutoff, low oil alarm, overload alarm, output indicator
Noise level Lpa (23 ft.)/Lwa, dB	64/89
Power output DC, V/А	12V/8.3A
Engine model	KS 240i-1
Engine cylinder volume, cc	223
Engine type	Gasoline powered one-cylinder, four-stroke air-cooled
Engine power, hp	9.0
Crank case volume	24 fl. oz (0.7L)
Accumulator (A·h)	1.6
Alternator winding	Copper
Includes	Inverter Generator, Owner’s Manual, Spark Plug Wrench, PH2 Screwdriver 0.24 in, Oil Funnel
Gross dimensions (LxWxH)	24.4” x 16.7” x 23.6”
Net weight, lbs	86.9
Gross weight, lbs	86.9
SKU	4260405366644
Barcode	4260405366644

*** Fuel consumption depends on many factors, such as load, fuel quality, season, altitude, technical condition of the generator.

ATTENTION! The product is sold without engine oil or gasoline. Before the first start, engine oil for four-stroke gasoline engines must be added. We recommend 10W-30 or 10W-40 oil. Always check the oil level before each use. Use only unleaded gasoline with an octane rating of 87 or higher. t's acceptable to use gasoline with 10% bio-ethanol.

Instructions

Inverter Portable Generators

Instruction | Inverter Generators

Könner & Söhnen Energy 2025

Catalog | K&S Energy

Video Reviews

Inverter Generators

Gasoline inverter generator KS 6000iES CO

It was a bit late, but he had his first 36 hours on a party sound system with a DJ booth, lights, and a smoke machine, 20 percent off power use. That's it, so we can grow bigger with time. Thank you so much for this powerhouse and the way things have been solved.

Generator heeft de eerste 20 uur probleemloos gedraaid. Tot zo ver erg tevreden

Levering was wel rommelig, maar apparaat is een prima en degelijk mooie kwaliteit .

Alles besten , ich habe lediglich den 5% Nachlass nicht mehr gefunden. Den gab es noch vor 14 Tagen.

Generator werkt goed. 10 minuten gedraaid met 50% belasting, geen probleem.

1 2 3

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Frequently Asked Questions

It can power essential circuits through a manual transfer switch or interlock — fridge, furnace blower, sump pump, lights, and electronics. It's not sized to run central AC plus your entire home at once; plan your load.

58 dB at 23 ft/7 m (at 25% load) - below the level of a normal conversation, and much quieter than open-frame generators of the same power.

Yes. The pure sine wave inverter delivers clean, wall-quality power, safe for laptops, TVs, and equipment like CPAP machines.

Free UPS shipping to 49 states, 1–4 business days. We currently don't ship to California.

The generator, owner's manual, spark plug wrench, PH2 screwdriver, and an oil funnel. (Note: no oil or gas included — add 10W-30 or 10W-40 before first start.)

$1,099.00

$1,399.00

Könner & Söhnen 5500W Portable Inverter Generator | Gasoline, Electric Start, CO Sensor | KS 6000iES CO

Specification

Benefits

Delivery

Payment