Best Portable Generator Under £300
A power outage doesn't have to mean total darkness or a dead fridge. We've found the best portable generators under £300 that offer reliable power for camping, DIY projects, and emergency backup without draining your wallet.
Quick answer
The Hyundai HY1000Si is our top pick for its inverter technology, quiet operation, and clean power at just under £300. For a budget-friendly option that still delivers solid performance, the Clarke IG1000 offers excellent value for occasional use.
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Research updated June 2026.
Hyundai HY1000Si
Inverter technology delivers clean, stable power for sensitive electronics.
| Product | Best For | Running Power | Rating | Price |
|---|---|---|---|---|
| Hyundai HY1000Si | Overall / Electronics | 900W | 4.6/5 | Check Amazon |
| Clarke IG1000 | Budget Value | 800W | 4.3/5 | Check Amazon |
| Draper 650W | Light Duty / Camping | 500W | 4.1/5 | Check Amazon |
| Sealey 1000W | Worksite Power | 850W | 4.2/5 | Check Amazon |
| Einhell TC-PG 1000 | DIY Projects | 800W | 4.0/5 | Check Amazon |
Hyundai HY1000Si
Best OverallPros
- Inverter technology for clean power
- Very quiet at 58 dB
- Lightweight and portable
Cons
- Only one AC outlet
- Fuel tank is small
The Hyundai HY1000Si is the standout choice in this price bracket thanks to its inverter technology. This means it produces clean, stable electricity that is safe for sensitive electronics like laptops, phone chargers, and CPAP machines. Owner reviews consistently praise its quiet operation, making it suitable for campsites where noise restrictions apply.
At just 13 kg, it is one of the lightest models available, making it easy to carry from the garage to the car. The 900W running power is enough for a fridge, a few lights, and a TV during a power cut. The main drawback is the single 13A socket, which may require an extension lead for multiple devices.
Clarke IG1000
Best Budget ValuePros
- Very affordable price
- Reliable Clarke build quality
- Two AC outlets
Cons
- No inverter (standard power)
- Heavier than competitors
The Clarke IG1000 is a solid conventional generator that offers excellent value for money. It lacks inverter technology, so the power output is not as clean as the Hyundai, but it is perfectly adequate for power tools, lights, and resistive heaters. Owner reviews highlight its reliability and ease of starting, even after long periods of storage.
With two 13A sockets, it offers more convenience than the Hyundai for running multiple devices. The 63cc engine provides decent torque for its class. The main trade-off is weight and noise; at 16 kg and 65 dB, it is heavier and louder than the top pick, but still manageable for most users.
Draper 650W Portable Generator
Best for Camping & Light DutyPros
- Very lightweight at 11 kg
- Compact size for storage
- Low price point
Cons
- 2-stroke engine needs mixed fuel
- Limited power for larger appliances
The Draper 650W is the smallest and lightest generator on our list, making it ideal for camping trips where every kilogram matters. Its 500W running power is enough to charge batteries, run a small kettle, or power LED lighting. The 2-stroke engine is simple and easy to maintain, though it requires pre-mixed fuel.
Owner reviews note that it starts reliably and runs smoothly for its size. The low power output means it cannot handle a fridge or power tools, so it is best suited for leisure use rather than emergency backup. The lack of an inverter means power is not suitable for sensitive electronics without a filter.
Sealey 1000W Portable Generator
Best for Worksite PowerPros
- Durable steel frame
- Good power output for tools
- Low oil shutdown protection
Cons
- Heaviest model on the list
- Louder than inverter models
The Sealey 1000W is built for durability, with a robust steel frame that can handle the bumps of a worksite. It delivers 850W of continuous power, which is enough for angle grinders, circular saws, and site lighting. The low oil shutdown feature protects the engine from damage, a useful safety addition.
Owner reviews frequently mention its reliable starting and consistent power delivery. The 68 dB noise level is noticeable but typical for a conventional generator in this class. At 17 kg, it is the heaviest option, so it is best suited for use in a van or garage rather than frequent carrying.
Einhell TC-PG 1000
Best for DIY ProjectsPros
- Good value for money
- Two AC outlets and one DC outlet
- Easy to start with recoil starter
Cons
- No inverter technology
- Plastic components feel less durable
The Einhell TC-PG 1000 is a practical generator for home DIY enthusiasts. It offers 800W of running power, which is enough for drills, jigsaws, and sanders. The inclusion of a 12V DC outlet is a nice bonus for charging car batteries or running 12V accessories directly.
Owner reviews appreciate its straightforward operation and decent power for the price. The plastic fuel tank and control panel feel less robust than the metal components on the Sealey, but for occasional home use, it holds up well. The 67 dB noise level is average for this class.
What to Check Before Buying a Portable Generator Under £300
Before you buy, consider the type of power you need. Inverter generators produce clean power for electronics but cost more. Conventional generators are cheaper and more powerful for their size but produce power that can damage sensitive devices. Check the running wattage, not just the peak wattage, as that is the continuous power the generator can supply.
Noise level is another key factor. Inverter models like the Hyundai HY1000Si operate at around 58 dB, which is quiet enough for conversation. Conventional models run at 65-68 dB, similar to a vacuum cleaner. Weight and portability matter if you plan to move the generator frequently. Look for models with a carrying handle and wheels if possible.
Mistakes to Avoid
One common mistake is buying a generator with too little power. Add up the wattage of everything you want to run at the same time, then add a 20% buffer. Another error is forgetting that conventional generators produce dirty power that can damage laptops, phones, and other electronics. Always use an inverter generator for sensitive devices.
Many buyers also overlook fuel type. 2-stroke engines require mixed oil and petrol, which is less convenient than the straight petrol used by 4-stroke engines. Finally, do not skip the break-in period. Running the generator at half load for the first few hours helps the engine last longer.
FAQs
Can a generator under £300 power a fridge?
Yes, most models with at least 800W running power can handle a standard fridge. Check the fridge's starting wattage, which is usually higher than its running wattage.
What is the difference between running watts and peak watts?
Running watts are the continuous power the generator can supply. Peak watts are the maximum power for a few seconds when starting motors or appliances.
Are inverter generators worth the extra cost?
Yes, if you need to power laptops, phones, or other sensitive electronics. Inverter generators produce clean, stable power that prevents damage to these devices.
How loud are portable generators under £300?
Inverter models are around 58 dB, about as loud as a normal conversation. Conventional models are 65-68 dB, similar to a vacuum cleaner.
Can I run a generator in the rain?
No, never run a generator in rain or wet conditions. Always place it on a dry surface under a canopy or generator tent.
How often should I change the oil?
Change the oil after the first 20 hours of use, then every 50-100 hours or once per season. Check the owner's manual for specific intervals.
What size generator do I need for camping?
A 500-800W generator is enough for camping. It can power lights, charge devices, and run a small kettle. For a fridge or air conditioner, you need 1000W or more.
Is it safe to use a generator indoors?
No, generators produce carbon monoxide, which is deadly. Always use them outdoors, at least 20 feet from doors, windows, and vents.
How long will a generator under £300 last?
With proper maintenance, a quality generator can last 1000-2000 hours. This translates to several years of occasional use or one season of regular use.
Can I connect a generator to my house wiring?
Only with a transfer switch installed by a licensed electrician. Plugging a generator directly into a wall outlet can cause backfeeding and electrocution.
Our verdict
For most people, the Hyundai HY1000Si is the best portable generator under £300. Its inverter technology, quiet operation, and light weight make it ideal for camping, emergency backup, and powering electronics. If you need a generator for power tools on a budget, the Clarke IG1000 offers the best value for money.