Best 4000w Generator Deals - Top 10 in August 2025
Last Update: 02. August 2025
1
Best Choice
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
- 3840Wh LiFePO4 Battery: The AFERIY extension battery leverages LiFePO4 technology, boasting a substantial capacity of 3840Wh. It has an outstanding lifespan, enduring over 6500 charge - discharge cycles, which ensures it can serve you for more than 10 years
- Perfectly Compatibility with AFERIY P310 PRO: This smart battery is custom - designed for the AFERIY P310 PRO portable generator. It integrates flawlessly with the existing power supply, enabling you to effortlessly expand the battery capacity. When operated in parallel, both the output and input power can reach an impressive 4000W
- Versatile Charging Options: The AFERIY extension battery offers versatile charging solutions. You can charge it using a 200W solar panel (via XT60 input) or a standard mains socket. This dual - charging functionality makes it perfect for off - grid escapades as well as home use. The package includes the charging cable for the input
- Multiple Output Ports and Easy Mobility: Equipped with a variety of output ports, such as an 18W USB - A output and a 100W Type - C output, the AFERIY Expansion Battery allows you to charge other devices conveniently. It weighs 36.5 kg and has dimensions of 46.4 x 32.1 x 58.4 cm. To facilitate easy transportation, it comes with wheels and a telescopic handle
- Comprehensive Packaging Contents: The package contains a 3840Wh extension battery, a 3600W connection cable, an MC4 - XT60 cable, a storage bag, a protective cover, and detailed instructions
| Colour | Brand | Weight |
| - | AFERIY | - |
£1,99900
2
Best Value
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
maXpeedingrods
TODAY 15% OFF!
£339.99
(15% DISCOUNT!)
FREE delivery**
- 【Multifunction Power Supplier】4-stroke petrol generator produces 3500W max watts and 3200W running watts. It is easily able to keep the lighting system or a small family house, power air conditioners and many other small appliances such as refrigerators,coffee machine at the same time.
- 【Provide Clean Power】This inverter technology provides more steady power, produces clean power to safely operate and prevent damage to sensitive electronics such as phones, tablets, televisions and computers.
- 【Multi-Function Display】Easy to monitor voltage and frequency power; display remaining fuel, which is suitable for timely fuel change; display cumulative runtime, which is suitable for later generator maintenance; display unique runtime, perfect timer function.
- 【Lightweight and Powerful Motor】Only 26 kg, small and compact, easy to carry, 223 cc OHV motor with two 230 V ports and a 12 V DC connector, provides plenty of power for multiple tasks.
- 【Brand Warranty】 Maxpeedingrods warrants all the inverter generators against defects in workmanship under normal use for a period of 2 years from the date of retail purchase by the original end-user purchaser ("Warranty Period"), and free lifetime technical support and customer service.
| Colour | Brand | Weight |
| Orange/Black | maXpeedingrods | 26 kg |
£28899
Was: £339.99
-15%
3
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
Aceup Energy 3800 Watt Inverter Generator, Petrol Powered Generator Pure Sine Wave 223cc, EURO-V, CE
United Power Equipment Co.,Ltd
FREE delivery**
- 223cc 4-stroke OHV engine produces 3800 peak watts and 3500 rated watts with recoil start for up to 10 hours at quarter-load on 10 L, 50Hz
- Intelligent gauge keeps track of voltage ,run-time and hertz and track power output, plus feature low oil led and economic mode to save fuel
- Includes two 230V AC outlets, one 12V DC 8.3A outlet and two 5V USB ports; Parallel ready to connect 2 generators for twice the power (parallel kit sold separately)
- This portable generator for camping produces the clean power required by a variety of sensitive electronics such as phones, TV
- All generators are functionally tested in the factory to guarantee quality with CE EURO-V compliant; Backed by a 1 year limited warranty with lifetime technical guidance from experts
| Colour | Brand | Weight |
| Yellow and Black | Aceup Energy | 28 kg |
£37999
4
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
Hyundai
TODAY 5% OFF!
£849.99
(5% DISCOUNT!)
FREE delivery**
- Powerful 223cc Hyundai petrol engine: Produces a maximum output of 4kW and continuous output of 4000W
- Ideal for use whilst camping or in a caravan/motorhome: Great for TVs, laptops, smartphones, small air pumps and more
- Ultra-quiet generator with remote electric start: Won't disturb others on your camping or caravan site
- Power multiple devices at the same time: Outlets include a 230v socket and 12v DC battery charger
- Portable generator: Folding front handle and heavy-duty wheels make transportation easy
- Economical generator: Included ECO mode lowers engine revs to increase fuel economy
- Easy to use: Popular option for powering family holidays
- Peace of mind: 3 year Hyundai domestic warranty* (terms apply)
| Colour | Brand | Weight |
| Blue | Hyundai | 47 kg |
£80749
RRP: £849.99
-5%
5
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
RocwooD
- Power - The RocwooD RG8000I Generator is powered by a single cylinder OHV four-stroke air cooled engine. The RG8000I exceeds the Euro V standard and the inverter produces 100% clean pure-sine power that is capable of running sensitive electronic equipment.
- Reliable - You can look forward to 3500 watts of continuous power output, with 4000 watts on tap to cope with the initial draw. This generator can run a huge range of appliances and is ideal for camping. Reliable and powerful at a affordable price.
- Electric Start - With a built in battery the RG8000I conveniently starts at the push of a button. There is also pull start on offer as a backup. The RG8000I Inverter generator has two approved 230V 16AMP outlets, dual USB sockets for fast charging and a 12V 8AMP battery charging outlet. The RG8000I boasts a huge 6L tank meaning you can expect an impressive running time of over 12 hours at half load or 6 hours at full load and is one of the quietest on the market and idles at just 65 decibels on a 50% load.
- Transport - You can transport it around with minimum fuss thanks to the sturdy telescopic handle and large all terrain wheels. So whether you need a seriously powerful generator on hand for running tools on the job site, for your motorhome, off-grid cabin, your next camping adventure or as backup for power outages, the RocwooD RG8000I is a workhorse you can rely on.
- Warranty - This RocwooD product comes with a 12 Month domestic user warranty, business or continuous use will invalidate any warranty.
| Colour | Brand | Weight |
| Black | RocwooD | 48 kg |
£78399
6
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
K&S Könner&Söhnen
- The built-in electronic unit with microprocessor control monitors the operation of thegenerator and provides a stable output voltage of 230V 50Hz sinusoidal form, which issuitable for the reliable operation of sensitive electronics
- Soundproof housing provides minimal noise (70dB Lpa 7m), comfortable use andconvenient transportation and is equipped with transport system for easy handling.
- The generator has an ATS output for connecting an ATS unit (Automatic TransferSwitch). The ATS unit automatically starts the generator and transfers the load to it when the main power supply is disconnected. The ATS output features an 8-pinconnector for connecting the ATS unit KS ATS 4/25 Petrol.
- The reliable proprietary K&S engine is characterised by increased wear resistance,long-term and stable operation as well as meets all European quality standards,including the latest EUROV emission standards. The ECONOMY MODE reduces fuelconsumption up to 50% at low loads due to reduced engine speed.
- Ergonomic control panel is equipped with 6-in-1 multifunction LED display,ECONOMY MODE switch,typical 12 V car socket, generator parallel connection outputfor double power as well as RESET button for resetting the control system (upontripping of the circuit breaker) and restoring power supply, ATS output.
- Könner & Söhnen petrol inverter generators are equipped with a robustbrushless alternator with 100% copper winding. The high-end compactpermanent magnet alternator is housed in a plastic casing and can withstandmaximum loads without any damage to ensure long-term and reliableoperation of the generator set.
- Control of all main operating status indicators: overload protection, automatic enginestop at low oil level, 6-in-1 multifunction LED display (load, fuel level, frequency,voltage, hour meter), oil level, overload and operation indicators.
- KS PU1 generator parallel connection box from Könner & Söhnen. Parallelconnection of two inverter generators ensures double output power.
| Colour | Brand | Weight |
| Blue4000ie S | K&S Könner&Söhnen | 38 kg |
£76400
7
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
AIVOLT
TODAY 12% OFF!
£489.99
(12% DISCOUNT!)
FREE delivery**
- True Sine Wave Power - This inverter generator has a powerful 149cc 4 stroke OHV air-cooled 100% copper winding engine which can produce 3300W maximum watts and 3000W continuous watts steady clean power (less than 3% THD) with very low fuel consumption. Ideal for sensitive electronics such as phones, laptops.
- Eco Mode & Long Runtime - A fully fueled 4.2L tank will provide you consistent power for up to 8 hours making the generator extremely economical. It runs 4.5 hours at 50% load（1500W）, 3 hours at 75% load（2250W）, 2.5 hours at 100% load. In Eco-mode, it even runs more time and prolongs generator‘s life. Perfect for camping, RV travel, caravan, motorhome and jobsites.
- Multifunction Control Panel with 5-in-1 LCD Multi-Meter - The outstanding design features bright orange appearance and multifunctional panel including parallel connectability, 2 standard 230v 3 pin sockets, 2 USB charging ports(type-A & type-C), a 12v DC charging outlet, a digital display meter. Suitable for caravans, lighting systems, car refrigerator and many large outdoor appliances.
- Ultra Lightweight & Low Noise - Weighs only 23kg, the labor-saving and ergonomic handle is very easy to lift. When the generator is at 25% load, it comes with 61 decibels noise at 23 feet that is comparable to the sound of a normal conversation.
- The package contains: 1*3300W petrol generator, 1*spark plug wrench, 1*oil funnel, 1*12V DC battery charging cable, 1* screw driver, 1* quick start guide, 1*manual.
| Colour | Brand | Weight |
| Orange | AIVOLT | 23 kg |
£43299
RRP: £489.99
-12%
8
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
ZAMDOE
FREE delivery**
- Replaces part number: #16211-ZE1-000.
- For Honda Gx120 Gx160 GX168 GX200 5.5Hp 6.5Hp Engine EM1600X EM1800X EB2200X EM2200X Generator.
- Used on Power Equipment(CPE) 196cc OHV engine 3000 3500 4000 Watt Gas Powered Portable Generators.
- Fit Models: 46558, 46561, 46596, 46533, 46534, 46535, 46539, 46540, 46551, 46553, 46554, 46555, 40026, 40008, 40012, 46514, 46515, 46516, 46517, 45633.
- Package Included: 1 x Carburetor, 1 x Intake Manifold, 3 x Gaskets, 1 x Insulator, 1 x Fuel Line, 1 x Fuel Filter.
| Colour | Brand | Weight |
| - | ZAMDOE | - |
£1499
9
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
Champion Power Equipment
- The cover protects the generator from dirt and moisture – e.g. rain, etc.
- The cover is suitable for frame generators 2000-4000 watts from Champion
- The hood is made of high-quality material and is therefore particularly robust and durable
- Includes a protective cover for generators
| Colour | Brand | Weight |
| - | Champion Power Equipment | - |
£2699
10
Our rankings are created by artificial intelligence (AI) from the algorithmic analysis of hundreds of thousands of customer reviews on products, brands, the level of service of the retailers, as well as popularity trends and much more. The ranking reflects our opinion and should be a good starting point for your purchase.
CHONGQING DINKING POWER MACHINERY CO.，LTD
- 【Parallel&Series Connection Capability】Two Genmax 120v ONLY generators are combined into a 240V generator using a dedicated series parallel box (the series parallel box is sold separately)
- GENMAX Portable Inverter Generator, 4000W open frame Gas or Propane Powered Engine with Parallel Capability, Ideal for Camping Travel Outdoor.EPA Compliant (GM4000XiD-NFT)
| Colour | Brand | Weight |
| Black | GENMAX | 26.5 kg |
£94461
* the possibly used term "best" etc. refers only to our possibly subjective personal opinion.
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1. The prices shown may have risen since the time we last updated them.
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More information and FAQs about the featured 4000w Generator in this comparison:
Technical Details
| Colour | - |
| Brand | AFERIY |
| Weight | - |
Our editorial team is currently working on a detailed test of this product. Please check back in a few days.
Technical Details
| Colour | Orange/Black |
| Brand | maXpeedingrods |
| Weight | 26 kg |
Advantages
- Portable
- Inverter
- Pure Sine Wave
- Versatile
FAQs about maXpeedingrods 3500W Portable Inverter Generator 4-Stroke Pure Sine Wave Petrol Generator for Camping, RV Travel, Home, or Jobsites
What is the maximum power output of the maXpeedingrods generator?
The maximum power output of the maXpeedingrods generator is 3500W, making it suitable for various applications such as camping, RV travel, home backup, or jobsites.
What type of generator is the maXpeedingrods portable inverter generator?
The maXpeedingrods generator is a 4-stroke pure sine wave petrol generator, which ensures stable and clean power output for sensitive electronic devices.
Is the maXpeedingrods generator suitable for camping?
Yes, the maXpeedingrods generator is suitable for camping as it provides portable power for various camping appliances and devices.
Does the maXpeedingrods generator have a compact design?
Yes, the maXpeedingrods generator features a portable and compact design that allows for easy transportation and storage during camping trips or other outdoor activities.
Can the maXpeedingrods generator be used for home backup?
Yes, the maXpeedingrods generator can be used for home backup to provide power during emergencies or power outages.
Technical Details
| Colour | Yellow and Black |
| Brand | Aceup Energy |
| Weight | 28 kg |
Our editorial team is currently working on a detailed test of this product. Please check back in a few days.
Technical Details
| Colour | Blue |
| Brand | Hyundai |
| Weight | 47 kg |
Advantages
- Portable
- Inverter technology
- 3 year warranty
- 4000W power
FAQs about Hyundai 4000W / 4.0kW Portable Petrol Inverter Generator, Remote Keyfob & Electric Start, Wheel Kit & Closed Case Design, 3 Year Warranty
Is the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator fuel efficient?
Yes, the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator is fuel efficient and designed to provide longer runtime with maximum fuel efficiency.
What is the noise level of the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator?
The generator operates at a noise level of approximately 60 decibels, which is relatively quiet for a generator of its size and power.
Does the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator have electric start?
Yes, the generator is equipped with electric start for easy and convenient starting.
Can the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator power sensitive electronics?
Yes, the generator features inverter technology that produces clean and stable power, making it safe to power sensitive electronics.
What is the warranty period for the Hyundai 4000W Petrol 4.0kW / 5kVA Portable Inverter Generator?
The generator comes with a 3-year warranty, providing peace of mind and protection against any manufacturing defects.
Technical Details
| Colour | Black |
| Brand | RocwooD |
| Weight | 48 kg |
Advantages
- Quiet
- Portable
- Lightweight
- Easy to Use
- Compact
FAQs about Inverter Generator Petrol 4000W Watts RocwooD Portable Camping FREE Oil Quiet Silent Caravan Motorhome Outdoor Home 230V Lightweight UK Plug Compact 4 Stroke
What is the maximum power output of the generator?
The maximum power output of the generator is 4000W.
Is the generator suitable for camping and outdoor use?
Yes, the generator is portable and designed for camping and outdoor activities.
Does the generator come with oil included?
Yes, the generator comes with free oil included.
Is the generator quiet during operation?
Yes, the generator is designed to be quiet and silent during operation.
Does the generator have a UK plug?
Yes, the generator comes with a UK plug.
Technical Details
| Colour | Blue4000ie S |
| Brand | K&S Könner&Söhnen |
| Weight | 38 kg |
Advantages
- Portable
- Electric start
- Copper winding
- Overload protection
- UK Standard Plug Sockets
FAQs about Könner & Söhnen KS 4000iE S portable petrol inverter generator 4000W, petrol generator with electric start, copper winding, overload and short circuit protection, with UK Standard Plug Sockets
Does the generator have a built-in fuel tank?
Yes, the Könner & Söhnen KS 4000iE S portable petrol inverter generator has a built-in fuel tank.
What is the starting wattage of the generator?
The starting wattage of the Könner & Söhnen KS 4000iE S portable petrol inverter generator is 4000W.
Does the generator have electric start?
Yes, the Könner & Söhnen KS 4000iE S portable petrol inverter generator has electric start functionality.
Does the generator have overload protection?
Yes, the Könner & Söhnen KS 4000iE S portable petrol inverter generator is equipped with overload protection.
Are there UK Standard Plug Sockets on the generator?
Yes, the Könner & Söhnen KS 4000iE S portable petrol inverter generator comes with UK Standard Plug Sockets.
Technical Details
| Colour | Orange |
| Brand | AIVOLT |
| Weight | 23 kg |
Advantages
- Portable
- Ultra quiet
- Pure sine wave
- Suitable for camping and jobsites
FAQs about AIVOLT 3300W Petrol Inverter Generator 4 Stroke Portable Generator for Camping, Jobsites - Pure Sine Wave, Ultra Quiet-149cc Engine, 4.2L Fuel Tank
What is the maximum power output of the AIVOLT 3300W Petrol Inverter Generator?
The AIVOLT 3300W Petrol Inverter Generator has a maximum power output of 3300W.
Is the generator suitable for camping?
Yes, the AIVOLT 3300W Petrol Inverter Generator is portable and designed for camping purposes.
Does the generator produce pure sine wave power?
Yes, the AIVOLT 3300W Petrol Inverter Generator produces pure sine wave power, making it suitable for sensitive electronic devices.
What is the fuel tank capacity of the generator?
The AIVOLT 3300W Petrol Inverter Generator has a fuel tank capacity of 4.2 liters.
Is the generator engine noisy?
No, the AIVOLT 3300W Petrol Inverter Generator is ultra-quiet during operation.
Technical Details
| Colour | - |
| Brand | ZAMDOE |
| Weight | - |
Advantages
- Easy installation
- Improves engine performance
- Cost-effective
- Includes necessary gaskets and fuel line
FAQs about ZAMDOE Carburetor Replacement for Honda GX120 GX160 GX168 GX200 5.5Hp 6.5Hp 168F 163cc 196cc Engine & Power Equipment 3000 3500 4000 Watt 6.5Hp Gas Generator, with Gaskets Fuel Line
Is this carburetor compatible with other Honda engines?
No, this carburetor is specifically designed for Honda GX120, GX160, GX168, and GX200 engines.
Does this carburetor come with installation instructions?
Yes, this carburetor replacement comes with a set of gaskets and a fuel line, along with installation instructions.
What is the horsepower rating of this carburetor?
This carburetor is compatible with 5.5Hp and 6.5Hp engines.
Will this carburetor fit my 4000 Watt gas generator?
Yes, this carburetor is compatible with 3000, 3500, and 4000 Watt 6.5Hp gas generators.
Can I use this carburetor with a different brand of power equipment?
No, this carburetor is specifically designed for Honda GX series engines and compatible power equipment.
Technical Details
| Colour | - |
| Brand | Champion Power Equipment |
| Weight | - |
Our editorial team is currently working on a detailed test of this product. Please check back in a few days.
Technical Details
| Colour | Black |
| Brand | GENMAX |
| Weight | 26.5 kg |
Our editorial team is currently working on a detailed test of this product. Please check back in a few days.
General information you should know about 4000w Generator:
Are you in need of a reliable power source for your outdoor adventures or emergency backup? Look no further than the mighty 4000W generator. In this product comparison, we will explore the numerous benefits and features of a 4000W generator, aiming to help you make an informed decision and ultimately persuade you to purchase one of these powerful machines.
A 4000W generator is a versatile and efficient device that provides a stable power supply wherever you go. Whether you're camping in the wilderness or experiencing a power outage at home, this generator has got you covered. With a capacity of 4000 watts, it can power a wide range of appliances and tools, including refrigerators, air conditioners, power tools, and more. Its impressive power output makes it suitable for both residential and commercial use.
One of the key advantages of a 4000W generator is its portability. Most models come with wheels and a handle, allowing you to effortlessly transport it from one location to another. This is especially beneficial for camping trips or outdoor events where mobility is crucial. Despite its compact size, it packs a punch when it comes to power generation.
Furthermore, a 4000W generator typically features multiple outlets, enabling you to connect several devices simultaneously. This is particularly useful during emergencies or outdoor gatherings when you need to power multiple appliances or charge various devices at once. Additionally, some models offer USB ports for convenient charging of smartphones, tablets, or other electronic gadgets.
Safety is always a top priority, and 4000W generators are designed with this in mind. Most models incorporate advanced safety features such as automatic voltage regulation, low-oil shutdown, and overload protection. These features not only prevent damage to the generator but also safeguard your connected devices from potential electrical hazards.
In conclusion, a 4000W generator is a reliable and powerful companion for your outdoor adventures or emergency backup needs. Its versatility, portability, and safety features make it an excellent investment for both residential and commercial use. So why wait any longer? Make the wise choice and purchase a 4000W generator today to ensure a stable power supply wherever you go. Power up and enjoy peace of mind with this essential device.
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