Question 1

What Size Generator Do I Need?

Accepted Answer

It depends on what you want to power during an outage. For essential appliances like your fridge, lights, and heating, a 5-7kW generator usually does the trick for most homes. If you want to run everything including your oven and washing machine, you'll need more than 8kW Generator.

Question 2

How much does a generator cost in the UK?

Accepted Answer

Prices vary depending on the size and type. A basic portable petrol generator starts around £200-£500, whilst a professional diesel standby generator for your whole home and business typically ranges from £2,000 to £8,000.

Question 3

Which is better, a diesel or a petrol generator?

Accepted Answer

Diesel generators are more fuel-efficient and last longer, making them great for businesses or powering the whole house, but they're expensive. Petrol generators, meanwhile, are lighter, quieter, and cheaper upfront—perfect for household use or camping trips.

Question 4

What size generator will run a whole house?

Accepted Answer

Most UK homes need between 8-15kW to run everything comfortably. This covers your heating, fridge, lights, kettle, and even the telly. Larger homes with electric heating or multiple high-power appliances might need 20kW or more.   Our generator recommendation system   can help you calculate the exact size based on your specific needs.

Question 5

How long does a full tank last on a generator?

Accepted Answer

It varies by generator size and load, but typically a diesel generator running at 50% load will give you 8-12 hours on a full tank. Petrol generators usually run for 6-8 hours.

Question 6

Can I run my central heating with a generator?

Accepted Answer

Absolutely. Most modern boilers only need about 100-200 watts to run, so even a small generator can keep your heating going. Just make sure your generator has enough capacity for the boiler plus any other essentials you want running at the same time.

Question 7

What is an acceptable noise level for a generator?

Accepted Answer

Modern generators typically run between 60-75 decibels, about as loud as a normal conversation or a vacuum cleaner. Look for models with noise levels below 70dB if you're concerned about disturbing the neighbours.

Question 8

What is the average fuel consumption of a generator?

Accepted Answer

A typical diesel generator uses about 0.5-1 litre of fuel per hour per kW of output. So a 10kW generator running at half load would burn roughly 2.5-5 litres per hour. Petrol generators use slightly more fuel but the difference isn't huge.

Question 9

What size generator do I need for my business?

Accepted Answer

It really depends on your business type. A small shop or office might only need 5-10kW, whilst a restaurant or workshop could need 20-50kW or more.

Question 10

What size generator is needed to run a caravan?

Accepted Answer

Most caravans run perfectly well on a 2-3kW portable generator. This covers your lights, phone chargers, kettle, and small appliances. If you want to run an air conditioning unit or electric heater, you might need 3-5kW.   Our 2.5kVA petrol generator   does the job. It's got the power you need without being a pain to lug around.

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