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Generators: Your essential buying guide
Add up the running wattage of the tools or appliances you want to power, then allow extra capacity for start-up surges, especially with motors and compressors. Choosing a generator with a sensible margin helps avoid overloads and gives you more flexibility on site.
A standard generator is often chosen for general power output and rugged use, while an inverter generator is designed to provide a steadier electrical supply and is commonly considered for sensitive electronics. Check the product specification to confirm whether it is suitable for the devices you intend to connect.
Petrol generators are common for portable domestic and DIY use, while diesel models may suit heavier-duty or longer-running applications. Compare running requirements, fuel availability, maintenance needs, weight and intended workload before deciding.
No. Generators should only be used outdoors in a well-ventilated area, positioned away from doors, windows and vents. Engine exhaust can produce carbon monoxide, so always follow the manufacturer’s safety instructions and use suitable carbon monoxide alarms where appropriate.
Look at rated and maximum output, socket types, fuel tank size, expected runtime, noise level, weight, handles or wheels, overload protection and voltage regulation. These details make it easier to match a generator to real tasks rather than choosing on headline power alone.
Generators vary widely in output, portability and intended use. Before comparing models, think about the tools, appliances or equipment you need to run, where the generator will be used and how long you expect it to operate at a time.
Start with the wattage of each item you plan to power. Some equipment needs a higher starting wattage than its normal running wattage, so a generator that appears adequate on paper may still struggle if several motor-driven tools start together.
Check both rated output and maximum output. Rated output is the figure to focus on for continuous use, while maximum output is usually only suitable for short bursts.
If you need to move the generator around a garden, driveway or work area, compare weight, frame design, handles and wheels. A heavier model may offer more power, but it also needs to be practical to store, lift and position safely.
Generators should be placed outdoors on a stable surface with adequate ventilation. Cable length, weather protection and safe routing are important when planning where the generator will sit in relation to the equipment it powers.
Compare the number and type of outlets, including whether the generator has domestic-style sockets, industrial connectors or USB ports. Make sure the voltage and socket format suit your intended equipment.
If you plan to power sensitive electronics, look carefully for features such as inverter technology or automatic voltage regulation, and always follow the equipment manufacturer’s guidance.
Fuel tank size and load level affect how long a generator can run between refuelling. A model used occasionally for short DIY tasks may not need the same runtime as one used for longer workshop sessions or backup power.
Also consider maintenance access, oil checks, storage requirements and fuel type. A generator that is easy to inspect and maintain is more practical for regular use.
Noise level can make a big difference in gardens, residential areas and shared workspaces. Compare stated decibel ratings where available, and remember that perceived noise can increase depending on surface, distance and load.
Quieter models may be worth considering if you need occasional power without unnecessary disturbance, but always weigh this against output, runtime and budget.
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