The 10 Best Offers for Diesel Generators - November 2025
Last updated: 02. November 2025
We already helped 10 million customers this year!
We already helped 10 million customers this year!
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.
K&S Könner&Söhnen
- The diesel generator is equipped with a vandal-proof housing with better heat distribution inside, which ensures a longer service life of the device.
- Unique innovative VTS phase switching system allows the generator to be used either in three-phase (400V) or single-phase mode (230V) almost without loss of power.
- The diesel generator can be operated with an external ATS unit. It is equipped with a 6-pin connector socket that allows the generator to automatically turn on and off and maintain battery charge status in standby mode.
- The air pre-heater ensures an effortless start of the diesel power generator in the cold season.
- Ergonomic control panel of the generator allows easy operation of the diesel generator including the LED display (voltage, frequency, operating hour), overload and short circuit protection, low oil indicator, sockets, earth screw, 12 V terminals, etc.
- The & S company motor meets European quality standards, including the new exhaust standard Euro 5, and is equipped with an individual serial number with which we can monitor the production and service quality.
| Colour | Manufacturer | Weight |
| 9300de-1/3 Atsr | K&S Könner&Söhnen | 180 kg |
£1,59900
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.
AIVOLT
Save £69.94 Today!
£379.93
(18% OFF!)
Free Delivery**
- Pure Sine Wave Power - AIVOLT portable generator has a powerful 80cc 4 stroke OHV air-cooled 100% copper winding engine which can produce 1800 maximum watts and 1700W continuous watts steady clean power (less than 3% THD) with very low fuel consumption. Ideal for sensitive electronics such as phones, laptops and many large outdoor garden appliances.
- Eco Mode & Long Runtime - A fully fueled 3L tank will provide you consistent power for up to 8 hours making the generator extremely economical. It runs 7 hours at 25% load (450W), 5 hours at 50% load（900W）, 3.4 hours at 75% load（1350W）, 3 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.
- Unique Feature and Multifunction Control Panel - The outstanding design features bright orange appearance and a multifunctional panel including parallel outlets, a standard 230v 3 pin socket, 2 USB charging ports(type-A & type-C), a 12v DC charging outlet. It's convenient to double or even triple your power by using the parallel kit to connect to another AIVOLT inverter generator (including 1.2KW, 1.8KW, 3.3KW).
- Ultra Lightweight and Low Noise - Weighing in at only 15kg, and nearly 15% lighter than other same power compact generators. The labor-saving and ergonomic handle is very easy to lift. When the generator is at 25% load, it comes with 59 decibels noise at 23 feet that is comparable to the sound of a normal conversation.
- The package contains: 1*1800W 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 | Manufacturer | Weight |
| Orange | AIVOLT | 15 kg |
£30999
RRP: £379.93
-18%
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.
maXpeedingrods
Save £60.00 Today!
£549.99
(11% OFF!)
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 | Manufacturer | Weight |
| Orange,black | maXpeedingrods | 21 kg |
£48999
RRP: £549.99
-11%
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.
maXpeedingrods
Save £30.00 Today!
£339.99
(9% OFF!)
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 | Manufacturer | Weight |
| Orange/Black | maXpeedingrods | 26 kg |
£30999
Was: £339.99
-9%
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.
Monster Shop
- Enclosed by a soundproof canopy, you can be sure this powerful diesel generator will keep noise to a minimum, so it doesn’t disturb you, your neighbours, or employees when in operation.
- With a built-in ATS, this is a generator you can rely on to supply you with back up power almost at an instant to keep your home or business running smoothly. An optional electric start system allows you to effortlessly turn on the generator manually should you wish to.
- A fully fuelled 20L tank will provide you with consistent power for up to 16 ½ hours making the generator extremely economical.
- Power multiple devices at once with this high-performance single-phase generator and it’s incredible 6kVA maximum output.
- Fitted with 4 heavy duty 4” wheels and a sturdy handle, this compact machine is extremely easy to transport allowing you to manoeuvre it as required whether on a permanent site or on the move.
| Colour | Manufacturer | Weight |
| Orange | T-Mech | - |
£1,24999
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.
AIVOLT
Save £30.00 Today!
£269.99
(11% OFF!)
Free Delivery**
- Unique Feature and Multifunction Control Panel - The outstanding design features bright orange appearance and a multifunctional panel including parallel connectability, a standard 230v 3 pin socket, 2 USB charging ports(type-A & type-C), a 12v DC charging outlet. Suitable for TVs, computers, small electric tools and many kitchen appliances.
- Ultra Lightweight and Low Noise - Only weighs 12kg, and nearly 15% lighter than other same power compact generators. The labor-saving and ergonomic handle is very easy for a young woman to lift. When the generator is at 25% load, it comes with 58 decibels noise at 23 feet that is comparable to the sound of a normal conversation.
- Pure Sine Wave Power - This inverter generator has a powerful 60cc 4 stroke OHV air-cooled 100% copper winding engine which can produce 1.2kw starting watts and 1.1kw continuous watts steady clean power with very low fuel consumption. Ideal for sensitive electronics such as phones, laptops.
- Eco Mode & Long Runtime - A fully fueled 2.5L tank will provide you consistent power for up to 10 hours making the generator extremely economical. It runs 8 hours at 25%, 5.5 hours at 50% load, 4 hours at 75% load, 3.1hours at 100% load. In Eco-mode, it even runs more than 10 hours and prolongs generator’s life. Perfect for RV travel, jobsites and home use.
- The package contains: 1*1200W petrol generator, 1*spark plug wrench, 1*oil funnel, 1*12V DC battery charging cable, 1* screw driver, 1* quick start guide, 1*British plug, 1*manual.
| Colour | Manufacturer | Weight |
| Orange | AIVOLT | 12 kg |
£23999
Was: £269.99
-11%
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.
- Neilsen Bde3500e Diesel Generator CT1848
- Brand : Neilsen
- Product type: ELECTRICITY GENERATOR
- Color: Black
| Colour | Manufacturer | Weight |
| Red | Neilsen | 96 kg |
£95200
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.
maXpeedingrods
Free Delivery**
- 【Multifunction Power Supplier】The MXR3800 4-Stroke OHV inverter generator produces 3500W peak watts and 3200W running watts, it is ideal for camping, festivals, tailgating, caravans and home power backup.
- 【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.
- 【Portable and Lightweight】Thanks to its compact construction, this generator weighs 21 KG. Designed with a handle, it is extremely lightweight and easy to carry.
- 【Provide Clean Power】 It can provide safe, high-quality power for sensitive devices without affecting their service life. For example, it can directly charge mobile phones, laptops, cameras and other digital devices.
- 【Brand Warranty】Maxpeedingrods warrants all inverter generators against manufacturing defects under normal use for a period of 2 years from the date of retail purchase by the original end user ("Warranty Period") and provides free lifetime technical support and after-sales service
| Colour | Manufacturer | Weight |
| - | maXpeedingrods | 23.8 kg |
£49999
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.
K&S Könner&Söhnen
- Branded engines Engines for diesel generators, as well as for gasoline, are manufactured under license DIMAX Int. GmbH and are marked with their own brand with the logo. In all models, the power reserve of the engine in relation to the alternator allows you to issue the declared voltage and maintain its stability in the full range of voltages. All engines are tested for long continuous operation, and then disassembled and examined for faults. Each engine and each generator has an individual serial number, which allows us to control the quality of production and service.
- VTS system Universal generators 2 in 1 with a unique phase switching system VTS (Voltage Transfer Switch), which allows you to use one generator as a single-phase (230V) and three-phase (400V) with almost no loss of power. Each mode has its own automatic protection. No need to buy two separate generators.
- Automatic transfer switch The ATS (Automatic Transfer Switch) unit automatically starts the generator and transfers load to it when the main power supply is disconnected and automatically stops the generator when the central power supply is restored.
- Pre-start heating (PREHEATER) Diesel generators series "HEAVY DUTY" are equipped with a pre-start heating function, which allows you to run the generator in the winter without much effort.
- Housing All-season, noise-absorbing, vandal-proof casing provides effective protection of the generator and prolongs its service life. The casing is equipped with handles and transport wheels for easy movement.
- Transport wheels The generator housing is equipped with a 4-wheel transport set for easy movement of the unit.
| Colour | Manufacturer | Weight |
| 9200hdes-1/3 Atsr | K&S Könner&Söhnen | 168 kg |
£1,44400
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.
Hyundai
- Reliable Hyundai Power: powered by our Hyundai D400E 10hp single cylinder engine. Producing a max output of 5.2kW / 6.5kVA*. The generator has 1 x 115V 16amp, 1x 115V 32amp and 1 x 230V 32amp sockets. You can easily switch between 110V / 230V using the switch on the control panel.
- Ease Of Use: Features electric start and a convenient digital control panel which displays the frequency, voltage and total run time. Keeping on top of the required services is easy when monitoring the hours on the pane
- Silenced Operation: Part of the Hyundai silent range so is a quiet generator and comes with a sound attenuated canopy to reduce overall noise levels making it suitable for domestic or low noise areas.
- Engine Protection: The built-in low oil alarm and automatic shutdown keep the generator safe during operation and ensure the engine is protected at all times.
- Long Run Time: The large 13-litre fuel tank can provide up to 16 hours of run time @ 50% load. The DHY6000SE can run on standard white or red diesel.
| Colour | Manufacturer | Weight |
| White and Black | Hyundai | 152 kg |
£1,25000
General information about Diesel Generators:
Understanding Diesel Generators: A Comprehensive Overview
Introduction to Diesel Generators
Diesel generators play a crucial role in powering various industries, homes, and establishments worldwide. They are reliable and efficient sources of electrical energy, especially in areas without access to a stable electricity grid. These generators employ diesel fuel combustion to generate electrical power, making them ideal for both backup and primary power supply.
Overview of Diesel Generators
Diesel generators consist of three primary components: an engine, an alternator, and a control panel. The engine is responsible for converting the potential energy stored in diesel fuel into mechanical energy. This energy is then used to power the alternator, which converts it into electrical energy. The control panel manages the entire operation of the generator, including starting, stopping, and regulating the power output.
Advantages of Diesel Generators
Diesel generators provide numerous advantages, making them a popular choice for power generation. Firstly, they offer high energy density, meaning they produce a considerable amount of electrical energy per unit of diesel fuel. This makes them particularly efficient, cost-effective, and suitable for extended periods of use. Furthermore, diesel fuel is more readily available and easily accessible compared to other fuel types, ensuring a constant fuel supply for the generator.
Moreover, diesel generators are renowned for their durability and reliability. The combustion process within the generator is not subject to spark plugs or ignition systems, reducing the risk of malfunctions. These generators are also designed to handle heavy loads without overheating, making them suitable for a wide range of applications. Lastly, their low maintenance requirements and longer lifespan contribute to their appeal and economic viability.
Applications of Diesel Generators
Diesel generators find extensive use in various sectors and situations where a stable power supply is essential. Industries, such as manufacturing, construction, and mining, frequently rely on diesel generators to meet their power requirements. These generators are also utilized in residential areas, commercial buildings, and hospitals, providing backup power during outages or serving as the primary power source in remote locations.
Conclusion
In summary, diesel generators are highly efficient, durable, and versatile power sources widely used across industries and locations. Their ability to provide a steady supply of electrical energy, regardless of the availability of an electricity grid, makes them indispensable for numerous applications. With their long lifespan and relatively low maintenance needs, diesel generators have proven to be a reliable and cost-effective solution for meeting various power demands.
* 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.
** "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.