Best Inverter Generator Under £100
Finding a reliable inverter generator for under £100 is tough, but not impossible for low-power needs like camping, tailgating, or powering a few sensitive electronics. We've analysed specs, owner reviews, and brand reliability to find the best budget-friendly options that won't leave you in the dark.
Quick answer
For the best balance of portability, quiet operation, and clean power under £100, the Draper 650W Inverter Generator is our top pick. It delivers a stable sine wave for sensitive devices and weighs just 12kg, making it ideal for occasional use. For a slightly higher output, the Clarke IG1000 is a close runner-up.
Why trust ToolBuyerHub
- Tested on specs (power, torque, PSI)
- Battery & ecosystem compared
- Aggregated owner reviews
- Build quality & warranty checked
- Brand reliability
- No fake hands-on claims
Research updated June 2026.
Draper 650W Inverter Generator
Quiet, lightweight, and pure sine wave output for sensitive electronics.
| Product | Best For | Rated Power | Rating | Price |
|---|---|---|---|---|
| Draper 650W | Overall / Sensitive Electronics | 650W | 4.3 / 5 | Check price |
| Clarke IG1000 | Higher Peak Power | 900W | 4.1 / 5 | Check price |
| Sealey Power Products 650W | Budget / Basic Use | 650W | 3.9 / 5 | Check price |
| Draper 1000W | More Output (if on sale) | 1000W | 4.0 / 5 | Check price |
| Einhell TC-IG 1000 | Eco-Mode / Run Time | 900W | 4.0 / 5 | Check price |
Draper 650W Inverter Generator
Best OverallPros
- Pure sine wave output for laptops and phones
- Very quiet at 58 dB
- Lightweight and portable
Cons
- Low peak power for starting tools
- Small fuel tank (approx 2 hours run time)
The Draper 650W is the best all-rounder in this price bracket. It produces a clean sine wave, which is essential for powering sensitive electronics like laptops, phone chargers, and CPAP machines. Owner reviews consistently praise its quiet operation, making it a good choice for camping or outdoor events where noise is a concern.
Build quality is solid for the price, with a compact frame and a carry handle. However, the 650W rated output means it won't run power tools with high starting currents. It is best suited for low-wattage appliances and charging devices. The fuel tank is small, so expect to refuel every couple of hours under load.
Clarke IG1000 Inverter Generator
Best for Peak PowerPros
- Higher peak power for small tools
- Reliable Clarke brand reputation
- Good value for the output
Cons
- Slightly louder than Draper 650W
- Heavier than some competitors
The Clarke IG1000 offers a higher peak power of 1000W, which gives it a bit more flexibility than the Draper 650W. It can handle small power tools like a jigsaw or a drill, as well as lights and a fridge. Owner reviews note it starts easily and runs smoothly.
It is a bit heavier and louder than the Draper, but the extra power is worth it for many users. The build quality is typical Clarke - robust and functional. It is a solid choice if you need a little more grunt for occasional workshop use or running a small appliance during a power cut.
Sealey Power Products 650W Inverter Generator
Best BudgetPros
- Lowest price in the category
- Lightweight and easy to carry
- Decent noise level
Cons
- Build quality feels less premium
- Limited owner reviews available
The Sealey Power Products 650W is the most affordable option here. It provides the same basic 650W rated output as the Draper, making it suitable for charging devices, running lights, and powering a small TV. It is very lightweight at 11.5 kg.
Owner reviews are limited, but those that exist are generally positive for the price. The build quality is functional but feels a bit more basic than the Draper or Clarke models. It is a good entry-level choice if you are on a very tight budget and only need occasional emergency power.
Draper 1000W Inverter Generator
Best for More Output (if on sale)Pros
- Higher 1000W rated output
- Draper brand reliability
- Pure sine wave output
Cons
- Often priced above £100
- Heavier and louder than 650W models
The Draper 1000W is a step up in power, offering 1000W continuous output. This makes it capable of running a small fridge, a few lights, and a power tool simultaneously. It retains the pure sine wave output of its smaller sibling, so it is safe for sensitive electronics.
The main drawback is that it often retails for slightly over £100, though it can sometimes be found on sale within budget. It is also heavier and louder than the 650W models. If you can stretch your budget or find a deal, this is a much more capable unit for powering a small workshop or camping setup.
Einhell TC-IG 1000 Inverter Generator
Best for Eco-ModePros
- Eco-mode for better fuel efficiency
- Good power output
- Einhell brand with decent support
Cons
- Heavier than competitors
- Eco-mode can be slow to respond to load changes
The Einhell TC-IG 1000 is a solid contender with an eco-mode that adjusts the engine speed to the load, saving fuel and reducing noise. It offers 900W rated power, similar to the Clarke IG1000, making it suitable for small tools and appliances. Owner reviews highlight its good value and reliable starting.
The main downsides are its weight (14 kg) and that the eco-mode can sometimes be sluggish when a larger load is suddenly applied. It is a good choice if you plan to run it for longer periods and want to conserve fuel. The build quality is typical Einhell - functional and durable for the price.
What to check before buying an inverter generator under £100
When shopping on a tight budget, focus on these key specs. First, check the rated power (continuous watts) vs. peak power (surge watts). Most generators under £100 offer 650W to 1000W rated output. Second, look for pure sine wave output, which is essential for sensitive electronics like laptops. Third, consider noise level (measured in dB) and weight if you plan to move it often. Finally, check the fuel tank size and run time, as smaller tanks mean more frequent refueling.
Mistakes to avoid
A common mistake is buying a generator with too low a peak power for your needs. Always add up the starting watts of the devices you plan to run. Another mistake is ignoring the type of power output. A standard generator can damage sensitive electronics, so ensure you get an inverter model with pure sine wave. Finally, don't overlook the importance of brand reliability and warranty. Sticking to known brands like Draper, Clarke, or Einhell is safer than unknown budget brands.
FAQs
Can I run a fridge on an inverter generator under £100?
Yes, but only a small fridge or cooler. A typical fridge draws 100-200W running, but up to 800W on startup. A 650W generator may struggle, but a 900W-1000W model like the Clarke IG1000 can handle it.
What is the difference between an inverter generator and a standard generator?
An inverter generator produces a clean, stable sine wave that is safe for sensitive electronics like laptops and phones. Standard generators produce a less stable power output that can damage such devices.
How quiet are these generators under £100?
Most models in this price range have a noise level between 58 dB and 65 dB. This is comparable to a normal conversation and is quiet enough for camping or tailgating.
How long will a generator under £100 run on a full tank?
Typically, these generators run for 2 to 4 hours at half load on a full tank. The exact run time depends on the fuel tank size and the power draw.
Can I use an inverter generator for my TV and computer?
Yes, because inverter generators produce pure sine wave power, they are perfectly safe for TVs, computers, and other sensitive electronics.
Are these generators suitable for power tools?
Only for very small power tools like a jigsaw or a drill. Most power tools have a high starting current that exceeds the peak power of generators under £100.
What fuel do these generators use?
All models listed use standard unleaded petrol (gasoline). Always use fresh fuel and add a stabiliser if storing for long periods.
Do I need to ground these generators?
Yes, for safety, you should ground the generator using a grounding rod, especially when using it in damp conditions or with extension cords.
What is the best brand for a budget inverter generator?
Draper and Clarke are the most reliable brands in this price bracket. They offer good build quality and decent customer support compared to lesser-known brands.
Can I parallel two generators under £100?
No, generators in this price range do not have parallel capability. That feature is typically found on more expensive models.
Our verdict
For the best overall inverter generator under £100, the Draper 650W wins for its quiet operation, light weight, and pure sine wave output. If you need a bit more power for small tools, the Clarke IG1000 is a strong alternative. For the absolute lowest price, the Sealey Power Products 650W is a functional budget choice.