Best Portable Generator Under £100
Finding a reliable portable generator for under £100 is challenging, but not impossible. We have analysed the market for budget-friendly inverters and conventional generators that offer the best value for camping, power outages, and light DIY use.
Quick answer
For under £100, the top pick is the Draper 650W Portable Generator for its reliable output and build quality. For a quieter, more fuel-efficient option, the Clarke IG1000 inverter generator is the best choice for sensitive electronics.
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Research updated June 2026.
Draper 650W Portable Generator
Best balance of power, price, and reliability in the budget segment.
| Product | Best For | Key Spec | Rating | Price |
|---|---|---|---|---|
| Draper 650W | Overall Value | 650W, 63cc | 4.0/5 | Under £100 |
| Clarke IG1000 | Electronics Safety | 900W, Inverter | 4.2/5 | Under £100 |
| Sealey 650W | Build Quality | 650W, 63cc | 3.9/5 | Under £100 |
| Draper 900W | Higher Surge | 900W, 87cc | 3.8/5 | Under £100 |
| Hyundai HY650 | Budget Pick | 650W, 63cc | 3.7/5 | Under £100 |
Draper 650W Portable Generator
Best OverallPros
- Reliable Draper build quality
- Good runtime for its size
- Easy to start pull cord
Cons
- Noisy at full load
- 2-stroke requires oil mixing
The Draper 650W is the best all-rounder in this price bracket. It provides enough power for a fridge, a few lights, and a power tool during a blackout. Owner reviews consistently praise its reliability and ease of starting compared to cheaper alternatives.
It is a conventional generator, so it is not suitable for sensitive electronics without an inline conditioner. However, for basic power needs, it is a robust workhorse that offers the best value for money under £100.
Clarke IG1000 Inverter Generator
Best for ElectronicsPros
- Clean power for laptops/TVs
- Quieter than conventional models
- Lighter and more portable
Cons
- Lower surge capacity
- Can be over budget if not on sale
The Clarke IG1000 is an inverter generator, meaning it produces stable sine-wave power safe for sensitive electronics like laptops, phones, and TVs. It is also noticeably quieter than the 2-stroke models, making it better for camping.
It is often found just under £100 during sales. While it has a lower peak surge than the Draper 650W, its fuel efficiency and clean output make it the best choice for those who need to power tech gadgets rather than heavy tools.
Sealey 650W Portable Generator
Best Build QualityPros
- Robust steel frame
- Good brand reputation
- Spare parts readily available
Cons
- Heavier than competitors
- Lower runtime than Draper
Sealey is known for its professional garage equipment, and this generator reflects that build philosophy. The steel frame is more substantial than the Draper, offering better protection during transport and storage.
Performance is very similar to the Draper 650W, but the Sealey is slightly heavier and has a marginally shorter runtime. It is a solid choice if you prioritise a tough chassis and are a fan of the Sealey brand.
Draper 900W Portable Generator
Best for Higher SurgePros
- Higher surge capacity
- Can power larger tools
- Same reliable Draper brand
Cons
- Heavier and bulkier
- Often exceeds £100 price cap
For those who need a bit more starting power for a circular saw or a larger pump, the Draper 900W offers a higher surge capacity. It uses a larger 87cc engine, which provides more grunt but also adds significant weight.
This model can sometimes be found just under £100, but it often tips over the budget. If you can find it on sale, it is a great upgrade for the extra power, but you will pay for it in portability and fuel consumption.
Hyundai HY650 Portable Generator
Best Budget PickPros
- Lowest price point
- Lightweight for its class
- Decent power output
Cons
- Build quality is basic
- Noise levels are high
The Hyundai HY650 is the cheapest option on our list. It offers the same basic 650W output as the Draper and Sealey but is often available for significantly less money. It is a good choice for someone on a very tight budget who needs power only occasionally.
Owner reviews note that it is louder and the build quality feels less premium. It will get the job done for light use, but it is not as durable as the Draper or Sealey. It is a true budget compromise.
What to Check Before Buying a Portable Generator Under £100
When shopping on a tight budget, you must prioritise your needs. The most important factor is power output. Check the running wattage and the surge wattage of any appliance you plan to power. A generator under £100 typically offers 650W to 900W, which is enough for a fridge, a few lights, and a small power tool, but not for a whole house.
Consider the engine type. 2-stroke engines are lighter and cheaper but require mixing oil with petrol. 4-stroke engines (like the Clarke IG1000) are quieter and more fuel-efficient but are heavier and more expensive. For electronics, an inverter generator is essential, but these are rare under £100.
Finally, check the noise level and weight. Budget generators are loud, typically around 90-100 dB. If noise is a concern, look for an inverter model. Weight is also critical for portability; most models in this range weigh between 15kg and 20kg.
Mistakes to Avoid When Buying a Budget Generator
The most common mistake is underestimating power needs. A generator that claims 650W may not start a fridge motor if the surge rating is too low. Always check the surge capacity and ensure it exceeds the starting wattage of your appliances.
Another mistake is ignoring the fuel system. Many cheap generators have small fuel tanks that run out quickly. Also, do not forget that 2-stroke engines require a specific oil-to-fuel ratio. Using the wrong mix can destroy the engine.
Finally, avoid buying no-name brands. Generators from Draper, Clarke, and Sealey have better parts availability and customer support. A generic generator might be cheaper but could be impossible to repair if it breaks.
FAQs
Can a portable generator under £100 power a fridge?
Yes, most 650W models can power a standard fridge/freezer, provided the surge rating is high enough to start the compressor.
What is the difference between a 2-stroke and 4-stroke generator?
2-stroke generators are lighter and cheaper but require mixing oil with petrol. 4-stroke models are quieter, more efficient, and run on pure petrol.
Are inverter generators better than conventional ones?
Yes, for sensitive electronics. Inverters produce clean sine-wave power, while conventional generators can cause damage to laptops and TVs.
How long will a budget generator last?
With proper maintenance, a budget generator from a reputable brand like Draper or Sealey can last 200-500 hours of use.
Can I use a generator indoors?
No. Generators produce carbon monoxide and must only be used outdoors in a well-ventilated area, away from windows and doors.
What size generator do I need for camping?
For camping, a 650W generator is enough for lights, a kettle, and charging devices. An inverter model is preferred for quiet operation.
Do I need a voltage regulator for a conventional generator?
Yes, if you plan to power sensitive electronics. A cheap voltage regulator or UPS can protect your devices from power fluctuations.
What fuel do portable generators use?
Most small generators use unleaded petrol. 2-stroke models require a 50:1 or 40:1 oil-to-fuel mixture.
How do I maintain a cheap generator?
Change the oil (if 4-stroke), clean the air filter, and run the carburetor dry before storage to prevent gumming.
Can I parallel two budget generators?
No. Only specific inverter models with parallel capability can be linked. Budget generators under £100 do not have this feature.
Our verdict
The Draper 650W is the best portable generator under £100 for most people, offering a reliable balance of power and build quality. If you need clean power for electronics, the Clarke IG1000 inverter is the best choice, provided you can find it on sale. For the tightest budgets, the Hyundai HY650 will work, but expect a shorter lifespan.