The 10 best 4000W Generator

HYUNDAI

Hyundai 5.5kW / 5500W Petrol Inverter Generator, 5.0kW Continuous Output, Electric Start, Pure Sine Wave 230V Power, ECO Mode, Wheel Kit

• ⇅ No. 1 in the comparison · Score 10/10 (Excellent)
• ↗ Now £944.99
• ● Nur noch wenige auf Lager – Only 1 left in stock (more on the way).

High-Output 5.5kW Inverter Power – Produces 5500W peak and 5000W continuous power, ideal for large motorhomes, caravans and off-grid leisure setups running multiple appliances at once.

Technical details

Manufacturer

Hyundai

Quantity

1

Weight

39.00 kg

Dimensions

39.1 × 58.9 × 54.6 cm

Product features

• High-Output 5.5kW Inverter Power – Produces 5500W peak and 5000W continuous power, ideal for large motorhomes, caravans and off-grid leisure setups running multiple appliances at once.
• Electric Start with Recoil Backup – Reliable 223cc 4-stroke engine starts at the turn of a key for effortless operation, with recoil pull-start backup for added peace of mind.
• Pure Sine Wave for Sensitive Electronics – Advanced inverter technology delivers clean, stable 230V output, safe for laptops, TVs, phones and other delicate electrical equipment.
• Extended Runtime with ECO Mode – 11L fuel tank provides up to 21.7 hours at light load and 6 hours at 50% load; ECO mode lowers engine speed to reduce noise and fuel use.
• Fully Equipped & Easy to Move – Features 32A industrial socket, 13A UK socket, 12V outlet, digital display, overload protection and low oil shutdown. Integrated wheels and handle for manoeuvrability (39kg).

maXpeedingrods

maXpeedingrods 3300W Portable Inverter Generator Petrol Pure Sine Wave Silent Generator with 230V outlets, 12V/8.3A DC receptacle, USB outlets for Camping, RV Travel, Home, or Jobsites

• ⇅ No. 2 in the comparison · Score 9.6/10 (Excellent)
• ↗ Now £439.99 was £549.99
• ● LEADTIME – Usually dispatched within 2 to 3 days

Provides reliable power for camping, RV travel, and job sites with quiet operation and multiple outlet options.

Technical details

Colour

Orange,black

Manufacturer

maXpeedingrods

Size

3300W

Quantity

1

Weight

21.00 kg

Dimensions

48.0 × 29.0 × 43.9 cm

Advantages

• The generator produces a maximum of 3300W, making it suitable for running various appliances simultaneously, including lighting systems and small home devices.
• It operates at a low noise level of 58 decibels in ECO mode, minimising disturbance for users and those nearby.
• With a runtime of up to 12 hours in ECO mode, it can provide a consistent power supply for extended periods.
• The inverter technology ensures clean power output, protecting sensitive electronics from potential damage.

Frequently asked questions

HYUNDAI

Hyundai 3.3kW / 3300W Petrol Inverter Generator, 3.0kW Continuous, Recoil Start, Pure Sine Wave, 16A Industrial Socket Low Noise Power for Caravans & Motorhomes

• ⇅ No. 3 in the comparison · Score 9.4/10 (Very good)
• ↗ Now £499.00
• ● Auf Lager – In stock

3.3kW Peak / 3.0kW Continuous Output – Mid-range inverter power ideal for larger caravans, motorhomes and off-grid leisure setups running fridges, lighting, TVs and device chargers together.

Technical details

Manufacturer

Hyundai

Quantity

1

Dimensions

28.4 × 46.0 × 49.0 cm

Product features

• 3.3kW Peak / 3.0kW Continuous Output – Mid-range inverter power ideal for larger caravans, motorhomes and off-grid leisure setups running fridges, lighting, TVs and device chargers together.
• Pure Sine Wave Safe Power – Clean, stable 230V inverter output protects laptops, televisions, games consoles and other sensitive electronics.
• Reliable 144cc 4-Stroke Engine – Air-cooled petrol engine with simple recoil start, designed for dependable seasonal and leisure use.
• 4L Fuel Tank with ECO Mode – Up to 6.3 hours at 10% load and 3.6 hours at 50% load; ECO mode reduces engine speed for better fuel efficiency and lower noise (67.6 dBA @ 7m).
• 16A Industrial Socket & Digital Meter – Includes 1x 16A blue socket, 12V DC outlet and 3-in-1 digital display for voltage, frequency and runtime monitoring, plus AC reset protection.

equip2clean

Equip2clean Gorilla Power 3500W Inverter Suitcase Generator | Portable & Quiet | 14-Hour Runtime | Petrol-Powered | Electric Generator for Home, Outdoor Use, & Emergency Use | GP3500i

• ⇅ No. 4 in the comparison · Score 9.3/10 (Very good)
• ↗ Now £499.00
• ● Auf Lager – In stock

MAXIMUM POWER FOR DEMANDING TASKS: With 3500W peak and 3000W continuous output, this petrol generator provides ample power to run tools and appliances. Ideal for home, outdoor, or job sites, ensuring reliable electricity for your essential devices.

Technical details

Colour

Grey / Black

Manufacturer

Gorilla Power

Quantity

1

Weight

21.50 kg

Dimensions

45.0 × 30.0 × 45.0 cm

Product features

• MAXIMUM POWER FOR DEMANDING TASKS: With 3500W peak and 3000W continuous output, this petrol generator provides ample power to run tools and appliances. Ideal for home, outdoor, or job sites, ensuring reliable electricity for your essential devices.
• FUEL-EFFICIENT & LONG-LASTING: The 6L fuel tank offers up to 14 hours of runtime at ¼ load, making it perfect for extended outdoor sessions. Spend less time refueling and more time enjoying steady power with this power generator.
• QUIET OPERATION FOR PEACEFUL ENVIRONMENTS: Operating at only 63 dB at 7 meters, this inverter generator ensures minimal disruption during use. It’s perfect for outdoor activities and provides power with little noise, ensuring peace and quiet.
• PORTABLE & EASY TO TRANSPORT: Weighing just 21.5 kg, this portable generator strikes a perfect balance between power and portability. Easy to move from one place to another, whether you're in an RV, on a job site, or facing a power outage.
• VERSATILE CONNECTION OPTIONS: The Gorilla Power 3500W generator offers multiple connection options, including standard 240V AC outlets, USB charging, and a DC 12V auxiliary output, making it ideal for various devices and applications.

K&S Könner&Söhnen

KS 3000G petrol outdoor generator 3000 W, 2 x 13A (230 V), 12 V, LPG power generator with AVR, DUAL FUEL with 100% copper winding, UK Plug Sockets

• ⇅ No. 5 in the comparison · Score 9.3/10 (Very good)
• ↗ Now £467.00
• ● Nur noch wenige auf Lager – Only 1 left in stock.

Economical choice The use of gas as fuel significantly reduces operational costs. The price difference between a petrol-powered generator and the DUAL FUEL hybrid generator from TM Könner & Söhnen pays off quickly

Technical details

Colour

Blue3g

Manufacturer

K&S Könner&Söhnen

Quantity

1

Dimensions

43.9 × 57.9 × 42.9 cm

Product features

• Economical choice The use of gas as fuel significantly reduces operational costs. The price difference between a petrol-powered generator and the DUAL FUEL hybrid generator from TM Könner & Söhnen pays off quickly
• Versatile usage The generator can be used with both a portable gas cylinder and a stationary gas storage tank (gasholder). Connection must be carried out by a certified specialist. The pressure in the supply system must not exceed 16 bar
• User-friendly control panel The ergonomic control panel allows for easy operation thanks to the convenient layout of all key functions: modern LED display (hour counter, frequency, voltage), emergency circuit breaker, low oil level sensor, sockets, terminals, and more
• High-performance alternator The high-end synchronous petrol generator features 100% copper winding, capable of withstanding maximum loads without damage, ensuring long-term, reliable operation of the generator set
• Improved engine efficiency When operated on liquefied gas, the engine provides less vibration in a way that facilitates long and stable generator operation and increases engine service life

Aceup Energy

Aceup Energy 3400 Watt Petrol Inverter Generator Silent Pure Sine Wave | 4 Stroke Generator Portable for Home, Camping, Jobsites, EURO-V, CE

• ⇅ No. 6 in the comparison · Score 9/10 (Very good)
• ↗ Now £435.99
• ● AVAILABLE_DATE

Powerful Performance & Long Runtime: Equipped with a reliable 149cc 4-stroke OHV petrol engine, this generator delivers a peak output of 3400 watts and a rated running power of 3200 watts; Featuring a convenient recoil start system, it runs for up to 5 hours at half load on a single 5L fuel tank capacity, perfectly compatible with 50Hz UK household power supply

Technical details

Colour

Yellow and Black

Manufacturer

United Power Equipment Co.,Ltd

Size

3400 W

Quantity

1

Weight

23.00 kg

Dimensions

50.0 × 30.0 × 45.0 cm

Product features

• Powerful Performance & Long Runtime: Equipped with a reliable 149cc 4-stroke OHV petrol engine, this generator delivers a peak output of 3400 watts and a rated running power of 3200 watts; Featuring a convenient recoil start system, it runs for up to 5 hours at half load on a single 5L fuel tank capacity, perfectly compatible with 50Hz UK household power supply
• Digital Smart Gauge & Fuel Saving Mode: Built-in intelligent gauge keeps you fully informed of voltage, running time, hertz and real-time power output; Equipped with a low oil warning LED and dedicated economic mode to cut fuel usage and improve overall efficiency
• Multifunction Control Panel: Features two 230V AC outlets, one 12V DC 8.3A vehicle charging port, plus dual USB-A and USB-C ports; It is parallel ready, allowing two generators to be connected together to double your power output (parallel kit sold separately); The integrated control switch integrates fuel control, engine start/stop and choke functions to simplify start-up and overall operation
• Inverter Technology & Low Noise Operation: This portable pure sine wave generator delivers clean, stable power ideal for sensitive electronic devices including phones, laptops and TVs, with a THD level lower than 3%; The fully enclosed structure effectively lowers operating noise, producing only around 62dB at a distance of 7 metres
• Reliable Quality & Versatile Application: All petrol inverter generators undergo strict factory functional testing to ensure stable performance. Every unit is backed by a 1-year limited warranty and lifetime professional technical support; Weighing only 23 kg, this unit is highly portable and ideal for home power emergencies, outdoor gatherings, camping, caravan and RV trips, as well as construction and on-site work

JCB

JCB 3.6kW / 4.5kVA Petrol Site Generator 115V / 230V 7.5hp 224cc JCB Engine Recoil Start Engine Heavy Duty Professional Use Trade Worksite Builder Powerful Workshop 3 Year Warranty

• ⇅ No. 7 in the comparison · Score 9/10 (Very good)
• ↗ Now £419.99
• ● AVAILABLE_DATE

Powerful, Reliable Output: Impressive max output of 3.6kW / 4.5kVA* thanks to its market leading 7.5hp JCB engine.

Technical details

Colour

Yellow

Manufacturer

JCB

Size

3.6kw - 7.5hp 224cc

Quantity

1

Weight

50.00 kg

Dimensions

61.0 × 57.9 × 54.1 cm

Product features

• Powerful, Reliable Output: Impressive max output of 3.6kW / 4.5kVA* thanks to its market leading 7.5hp JCB engine.

Pro Splash

Pro Splash 3300W Portable Inverter Generator – 230V Petrol Generator with OHV Engine, 11L Fuel Tank, Quiet & Reliable Power for Camping, RV, Home Backup & Job Sites – Black

• ⇅ No. 8 in the comparison · Score 8.9/10 (Good)
• ↗ Now £359.99
• ● Nur noch wenige auf Lager – Only 14 left in stock.

The Pro Splash 3300W Portable Inverter Generator provides strong, consistent power with a 3kW rated output and a maximum capacity of 3.3kW, making it ideal for a variety of applications. Whether you're powering tools, appliances, or sensitive electronics, this generator delivers reliable performance to meet all your energy needs.

Technical details

Colour

Black

Manufacturer

Pro Splash

Quantity

1

Weight

21.00 kg

Dimensions

29.0 × 43.9 × 48.0 cm

Product features

• The Pro Splash 3300W Portable Inverter Generator provides strong, consistent power with a 3kW rated output and a maximum capacity of 3.3kW, making it ideal for a variety of applications. Whether you're powering tools, appliances, or sensitive electronics, this generator delivers reliable performance to meet all your energy needs.
• Operating at 230V / 50Hz, the Pro Splash 3300W Portable Inverter Generator ensures stable and reliable power for a wide range of devices and applications. Whether you're powering home appliances, tools, or electronics, it delivers consistent performance for all your needs.
• The Pro Splash 3300W Portable Inverter Generator is equipped with an 11L fuel tank, providing up to 5 hours of continuous runtime on a single fill. This feature makes it perfect for extended use without the need for frequent refueling, ensuring uninterrupted power for your devices and appliances.
• With a harmonic distortion rate of less than 3.0%, the Pro Splash 3300W Portable Inverter Generator is ideal for safely powering sensitive electronics and appliances. Whether it’s laptops, phones, or TVs, this generator ensures clean, stable power to protect your valuable devices.
• Finished in a sleek black design, the Pro Splash 3300W Portable Inverter Generator features 1 UK socket and 1 European socket, providing versatile connectivity for a variety of devices and applications. Whether at home, on the job site, or while camping, this generator meets your power needs with ease.

Ark Mat

Ark Mat 3500W Portable Inverter Generator Petrol, 4-Stroke 149cc Quiet Power Station, Pure Sine Wave Generator with 6L Fuel Tank, 230V/50Hz, Ideal for Camping, RV, Outdoor, and Home Backup - Orange

• ⇅ No. 9 in the comparison · Score 8.7/10 (Good)
• ↗ Now £349.95
• ● Auf Lager – In stock

POWERFUL & RELIABLE PERFORMANCE: Equipped with a robust 4-stroke, 149cc petrol engine, this inverter generator delivers a rated output of 3.2kW and maximum output of 3.5kW, providing steady, efficient power for home backup, camping trips, RV travel, and outdoor work.

Technical details

Manufacturer

Ark Mat

Quantity

1

Weight

27.30 kg

Dimensions

52.1 × 33.0 × 46.0 cm

Product features

• POWERFUL & RELIABLE PERFORMANCE: Equipped with a robust 4-stroke, 149cc petrol engine, this inverter generator delivers a rated output of 3.2kW and maximum output of 3.5kW, providing steady, efficient power for home backup, camping trips, RV travel, and outdoor work.
• PURE SINE WAVE, CLEAN POWER: Advanced inverter technology produces stable, low-distortion electricity, safe for sensitive devices like laptops, smartphones, TVs, and tablets. Ideal for modern homes and travel electronics.
• FUEL EFFICIENT & LONG RUNTIME: The 6.0L fuel tank ensures extended operation, offering dependable power for hours without frequent refuelling. Enjoy excellent fuel efficiency with low operating costs and reduced emissions.
• PORTABLE, COMPACT & EASY TO START: Designed with a lightweight frame and recoil start system, the generator is easy to carry and operate. Perfect for caravans, motorhomes, job sites, or outdoor adventures where reliable power is essential.
• SAFE & DURABLE: Built with copper wire alternator for longevity and oil alert system to prevent engine damage. Includes 2×16A UK sockets, 1xUSB socket 1xUSB C and 1×DC socket with protector, and a reset socket for overload protection.

Aceup Energy

Aceup Energy 1300 Watt Inverter Pure Sine Wave Petrol Silent Generator | 4-Stroke Portable Quiet Generator Ultra-Lightweight with 230V/12V/USB for Emergency Home Use Camping Caravan

• ⇅ No. 10 in the comparison · Score 8.5/10 (Good)
• ↗ Now £259.00
• ● Auf Lager – In stock

Compact & Lightweight: This compact petrol inverter generator is fitted with a reliable four-stroke OHV engine, delivering a peak starting power of 1300 watts and a continuous rated running power of 1100 watts at standard 50Hz frequency. Boasting an ultra-lightweight and space-saving compact design, this portable generator weighs merely 13.5 kilograms, making it effortless to carry, move and store for outdoor activities, home emergency power supply and daily leisure use

Technical details

Colour

Yellow

Manufacturer

United Power Equipment Co.,Ltd

Quantity

1

Weight

13.50 kg

Dimensions

43.2 × 27.2 × 41.1 cm

Product features

• Compact & Lightweight: This compact petrol inverter generator is fitted with a reliable four-stroke OHV engine, delivering a peak starting power of 1300 watts and a continuous rated running power of 1100 watts at standard 50Hz frequency. Boasting an ultra-lightweight and space-saving compact design, this portable generator weighs merely 13.5 kilograms, making it effortless to carry, move and store for outdoor activities, home emergency power supply and daily leisure use
• Multi Ports & Overload Protection:Features multi-functional interfaces including a standard 230V AC power socket, alongside a 12V DC 8.3A output port and dual Type-A & Type-C USB charging ports to meet diverse daily power supply needs. Integrated overload protection and low oil level warning LED indicator, it can effectively prevent abnormal operation failures and remind users to replenish engine oil in time, ensuring more stable long-term running
• Pure Sine Wave Power & Low Noise Operation: This portable inverter generator outputs stable pure sine wave electricity, which is ideal for powering different kinds of sensitive electronic devices including smartphones, laptops and digital cameras without risk of circuit damage or data loss. Adopting a fully enclosed structural design, it effectively cuts down running noise and features quiet operation at only 52dB@7m, as quiet as daily conversation, bringing you a more comfortable and quieter working and using experience
• Real-time Data Reading: Fitted with a practical smart V.F.T digital meter, this unit clearly shows voltage, operating hours and output frequency. You can easily keep an eye on the generator’s live working condition for hassle-free everyday use
• All petrol inverter generators undergo strict factory functional testing to ensure stable performance. Backed by a 1 year limited warranty with free lifetime technical guidance from experts