Best 4000w Generator Deals - Top 10 in April 2025

Last Update: 26. April 2025
1
Best Choice
9.9
EF ECOFLOW

  • [Powerful and Versatile] The EcoFlow DELTA Pro 3 supports 230V voltage and has a 4000W output (6000W with X-Boost) that can power almost of your home appliances.
  • [Multiple Charging Methods] Featuring a 4000Wh LFP battery, expandable to 12kWh with extra batteries or Smart Generators to meet your energy needs. With 6 unique charging methods, including AC outlets, solar panels, gas generators, and EV charging piles, you can forget fuel-cost worries.
  • [Uninterrupted Life] With an ultra-fast 10 ms switch-over time, enjoy instant backup for your NAS systems, servers, and entertainment devices. Safeguard against power disruptions and ensure continuous, safe operation. This portable power station is your reliable partner for an uninterrupted life.
  • [Explore the Secure Feeling] The EcoFlow DELTA Pro 3 features automotive-grade LFP cells and IP65-rated CTC battery pack technology, safeguarding battery health and extending its lifespan. Enjoy peace of mind with a 5-year warranty.
  • [Silent as a Whisper] With X-Quiet technology, this solar generator operates at a peaceful hum as low as 30 dB, ensuring undisturbed sleep even beside your bed. Its whisper-quiet operation is so discreet, making it perfect for both indoor and outdoor use.
Colour Brand Weight
Grey EF ECOFLOW 51.5 kg
£2,79900
Amazon
Show Deal
2
Best Value
9.8
United Power Equipment Co.,Ltd
TODAY 14% OFF!
£379.99 (14% DISCOUNT!)

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
  • NOTICE: The break-in period will last about 25 hours of use. DO NOT exceed 75% of the generator's rated capacity during this period. If you have any question for your order or need any assistance, please feel free to tell us.
Colour Brand Weight
Yellow and Black Aceup Energy 28 kg
£32599
RRP: £379.99 -14%
Amazon
Show Deal
3
9.7
AIVOLT

FREE delivery**
  • Eco Mode & Long Runtime - A fully fueled 13.5L tank will provide you consistent power for up to 13 hours making the generator extremely economical. It runs 10 hours at 25% load (1375W), 8 hours at 50% load(2750W), 5 hours at 75% load, 4.5 hours at 100% load. In Eco-mode, it even runs more time and prolongs generator’s life. Perfect for RV camping, construction, jobsites and power failures.
  • Multifunction Control Panel with 5-in-1 LCD Multi-Meter - The outstanding design features bright orange appearance and multifunctional panel including parallel connectability, a 230V AC outlet(32A), 2 standard 230V 3 pin sockets(16A), 2 USB outlets, a 12v DC charging outlet, a 5 in 1 LCD Multi-Meter. The included 12V DC battery charging cable can be used to charge the on-board power supply.
  • True Sine Wave Power - This inverter generator has a powerful 322cc 4 stroke OHV air-cooled 100% copper winding engine which can produce 6000W maximum watts and 5500W continuous watts steady clean power (less than 3% THD) with very low fuel consumption. Ideal for domestic appliances, industrial electrical equipment and many large outdoor garden appliances.
  • Portable & Low Noise - Weighs only 56kg, the high-power generator is very easy to pull with a labor-saving built-in telescopic rod and 2 never-flat wheels. When the generator is at 25% load, it comes with 62 decibels noise at 23 feet that is comparable to the sound of a normal conversation.
  • Electric Start & Recoil Start - This generator is equipped with an electric start. You can start the generator by pressing and holding the button, which makes starting the generator easier and more convenient. The manual start option is also retained to provide you with more starting options. The multi-function switch allows you to operate the generator with less effort and more efficiency.
  • The package contains: 1*6000W 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 56 kg
£99999
Amazon
Show Deal
4
9.6
maXpeedingrods

FREE delivery**
  • 【Multifunction Power Supplier】 Quiet and fuel efficient 4 stroke 145cc petrol generator produces 3300W max watts and 3000W running watts. It is easily able to run the lighting system, RV or a small family home. And run a huge range of high-power appliances such as an air conditioner with 6000 BTU cooling capacity, refrigerators, kettles, and even more appliances at the same time.
  • 【Low noise】When the generator is in ECO mode at 25% load and is 7m away from the generator, the noise level is 58 decibels. which is almost the quietest generator of this rated power. At this noise level, there is little disturbance for users and people nearby. Please note that ambient noise may affect the overall value of the noise of the machine.
  • 【Extra Long Runtime】Runs 8.3 hours at 25% load (750w load) 、4.5 hours at 50% load (1500w load). In ECO mode, the runtime can be extended up to 10-12 hours. Guaranteed power supply overnight.
  • 【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.
  • [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 21 kg
£54999
Amazon
Show Deal
5
9.5
K&S Könner&Söhnen

  • The inverter generator runs on both petrol and liquefied gas (propane-butane). The scope of delivery includes a gas hose with a reducer for connection to a gas cylinder according to DIN 477.
  • The built-in electronic unit with microprocessor control monitors the operation of the inverter generator and provides a stable output voltage of 230V 50Hz sinusoidal form.
  • Soundproof housingpetrol inverter generator provides minimal noise (71 dB Lpa 7 m), comfortable use and convenient transportation and is equipped with transport system for easy handling.
  • The generator has the ECONOMY MODE function that reduces fuel consumption by up to 50% and allows using the generator at low loads by reducing engine speed.
  • Parallel connection box from Könner & Söhnen KS PU1 enables to pair two inverter generators for double output power receiving.
  • The portable generator camping is equipped with LED display, two USB ports 5 V/1 A, 5 V/2.1 A, typical 12 V car socket, ECONOMY MODE switch, operating status indicators, generator parallel connection output for double power receiving
  • High-end synchronous alternator with 100% copper winding can withstand maximum loads without any damage to ensure long-term reliable operation of the silent inverter generator
  • IMPORTANT: Do not overtighten the gas hose nut — the connection is designed to be secure with minimal tightening. Overtightening may damage the fitting or impair its performance
Colour Brand Weight
Blue 4000ieg S K&S Könner&Söhnen 40 kg
£84900
Amazon
Show Deal
6
9.4
Hyundai
TODAY 8% OFF!
£779.99 (8% DISCOUNT!)

FREE delivery**
  • Powerful 210cc Hyundai petrol engine: Produces a maximum output of 1kW and continuous output of 3200W
  • Ideal for use whilst camping or in a caravan/motorhome: Great for TVs, laptops, smartphones, small air pumps and more
  • Ultra-quiet generator: 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
  • Compact and portable: Weighing just 35kg, easily store your generator in the back of your car or van
  • 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 35 kg
£71499
RRP: £779.99 -8%
Amazon
Show Deal
7
9.3
maXpeedingrods

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
£33999
Amazon
Show Deal
8
9.3
Briggs & Stratton

  • Quiet and fuel efficient 79cc OHV petrol engine produces 2400 starting watts and 1800 running watts in a compact design
  • The inverter technology produces smoother power. This means you can safely recharge and power your sensitive electronics such as laptops, smartphones and gaming systems
  • 3.8 litre fuel tank for up to 8 hours of continuous operation at 25 percent load
  • Automatically adjusts engine speed based on the items you're powering. Quiet Power Technology further reduces noise, fuel consumption and emissions
  • At 58dB operating volume, this portable generator is quieter than a normal conversation. (Sound levels may vary based on proximity and location; measured at ¼ load at 7 meters from control panel side)
  • Two 230V household sockets, one 12V DC charging outlet, and two 5V USB port offer enough flexibility to power an extensive combination of lights, laptops, blenders, personal electronics and more
  • CO Guard Carbon Monoxide Shutdown. Advanced Detection. Added Protection
  • An H-handle design lets one person easily carry the light generator when needed. It also allows two people to conveniently share the load. The optional wheel kit makes transport even easier
  • This petrol generator requires 0.5 litre SAE30 4-stroke oil for the engine. Not included in the box, please buy separately
Colour Brand Weight
Grey Briggs & Stratton 22.8 kg
£82999
Amazon
Show Deal
9
9.2
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
Amazon
Show Deal
10
9.1
United Power Equipment Co.,Ltd

FREE delivery**
  • 149cc 4-stroke OHV engine produces 3400 peak watts and 3200 rated watts with recoil start for up to 5 hours at half-load on 5L, 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 230V two AC outlets, one 12V DC 8.3A car charger outlet and USB TypeA/C ; Parallel ready to connect 2 generators for twice the power (parallet kit sold separately)
  • This portable generator produces the clean power required by a variety of sensitive electronics such as phones, TV; Fully-enclosed design reduces noice level
  • 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 23 kg
£43599
Amazon
Show Deal

* the possibly used term "best" etc. refers only to our possibly subjective personal opinion.
** "Free Delivery" means that this is possible under the given conditions at the time of data retrieval from the relevant provider, but cannot be guaranteed. It is technically not possible to provide information in real-time. The shipping costs may vary under certain circumstances (different provider, place of delivery, etc.). The shipping costs shown in the further ordering process apply.

Other IMPORTANT INFORMATION that we ask you to take note of:

We may receive a commission if you make a purchase via the links on our site. This has no impact on the placement of the products on our site. Our website is part of amazon associates program - Amazon, Amazon Prime, the Amazon Logo and Amazon Prime Logo are registered trademarks of Amazon, Inc. or its affiliates.

Disclaimer:
1. The prices shown may have risen since the time we last updated them.
2. The actual price of the product on the seller’s site at the time of purchase will govern the sale.
3. It is not technically possible for the prices displayed above to be updated in real-time. 

More information and FAQs about the featured 4000w Generator in this comparison:


Technical Details
Colour Orange
Brand AIVOLT
Weight 56 kg
Advantages
  • Portable
  • Ultra quiet
  • Pure sine wave
  • Electric key start
  • Suitable for camping, construction, jobsites
FAQs about AIVOLT 6000W Petrol Inverter Generator 4 Stroke Portable Generator for Camping, Construction, Jobsites - Pure Sine Wave, Ultra Quiet, Electric Key-322cc Engine, 13.5L Fuel Tank
How loud is the generator?
The AIVOLT 6000W Petrol Inverter Generator is ultra quiet, making it suitable for camping and other outdoor activities.
What is the engine capacity?
The generator is equipped with a 322cc engine.
How long can the generator run on a full tank of fuel?
The generator has a 13.5L fuel tank capacity, which allows for extended use before refueling is required.
Does the generator produce pure sine wave power?
Yes, the AIVOLT 6000W Petrol Inverter Generator produces pure sine wave power for the safe operation of sensitive electronics.
Is the generator suitable for construction and jobsites?
Yes, the AIVOLT 6000W Petrol Inverter Generator is designed for construction and jobsites, providing reliable power in remote locations.
Technical Details
Colour Orange,black
Brand maXpeedingrods
Weight 21 kg
Advantages
  • Portable
  • Silent
  • Pure Sine Wave
  • Suitable for camping
  • Ideal for RV travel
FAQs about maXpeedingrods 3300W Portable Inverter Generator Petrol Silent Pure Sine Wave Generator for Camping, RV Travel, Home, or Jobsites
What is the wattage of the maXpeedingrods portable inverter generator?
The maXpeedingrods portable inverter generator has a wattage of 3300W.
Is the maXpeedingrods generator petrol-powered?
Yes, the maXpeedingrods generator is petrol-powered.
Does the generator produce pure sine wave power?
Yes, the maXpeedingrods generator produces pure sine wave power.
Can I use the generator for camping or RV travel?
Yes, the maXpeedingrods generator is suitable for camping and RV travel.
Is the generator silent during operation?
Yes, the maXpeedingrods generator is designed to be silent during operation.
Technical Details
Colour Blue 4000ieg S
Brand K&S Könner&Söhnen
Weight 40 kg
Advantages
  • Portable
  • Dual fuel
  • Electric start
  • Silent operation
  • Multiple plug sockets
FAQs about Könner & Söhnen KS 4000iEG S portable LPG / petrol inverter generator 4000W, UK Standard Plug & 230V 2 x 13 Amp Plug Sockets, 2 USB ports, electric start dual fuel generator, ilent inverter generator
Does the generator have a dual fuel capability?
Yes, the Könner & Söhnen KS 4000iEG S generator can run on both LPG and petrol.
How much power does the generator produce?
The generator has a maximum power output of 4000W.
What type of plugs does the generator have?
The generator comes with a UK Standard Plug and two 230V 13 Amp Plug Sockets.
Is the generator easy to start?
Yes, the Könner & Söhnen KS 4000iEG S generator features an electric start for easy operation.
Is the generator quiet?
Yes, the Könner & Söhnen KS 4000iEG S generator is a silent inverter generator.
Technical Details
Colour Blue
Brand Hyundai
Weight 35 kg
Advantages
  • Portable
  • Inverter
  • Quiet
  • Easy to use
  • 3 Year Warranty
FAQs about Hyundai 3200W / 3.2 kW Petrol Inverter Generator, Remote Keyfob & Electric Start, Wheel Kit & Closed Case Design, 3 Year Warranty
What is the fuel capacity of the generator?
The fuel capacity of the Hyundai 3200w Portable Inverter Generator is approximately X liters.
How noisy is this generator?
The Hyundai 3200w Portable Inverter Generator is designed to be quiet during operation, making it suitable for camping and caravanning.
Does it have an electric start feature?
Yes, the Hyundai 3200w Portable Inverter Generator has an electric start feature for easy and convenient operation.
What is the weight of this generator?
The Hyundai 3200w Portable Inverter Generator weighs approximately X kilograms.
Can it power sensitive electronic devices?
Yes, this generator provides a sine wave output, making it safe to power sensitive electronic devices.
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 Grey
Brand Briggs & Stratton
Weight 22.8 kg
Advantages
  • Portable
  • Inverter
  • Clean Power
  • Ultra Quiet
FAQs about Briggs & Stratton 030801 Petrol Portable Inverter Generator PowerSmart Series P2400, 2400 Watt / 1800 Watt Clean Power, Ultra Quiet and Lightweight , Grey
What is the wattage of this generator?
The Briggs & Stratton 030801 Petrol Portable Inverter Generator PowerSmart Series P2400 has a wattage of 2400 watt/1800 watt clean power.
Is this generator quiet?
Yes, it is. The Briggs & Stratton 030801 Petrol Portable Inverter Generator PowerSmart Series P2400 is ultra quiet.
Is this generator lightweight?
Yes, it is. The Briggs & Stratton 030801 Petrol Portable Inverter Generator PowerSmart Series P2400 is designed to be lightweight.
What color is this generator?
The Briggs & Stratton 030801 Petrol Portable Inverter Generator PowerSmart Series P2400 is grey in color.
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.

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.