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Big Six reviews

EDF Energy

By Sarah Ingrams

Article 2 of 6

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EDF Energy

EDF is the UK’s biggest electricity supplier by volume and operates several power stations. Find out if EDF Energy is the best energy firm for you.

EDF Energy is a wholly owned subsidiary of the French state-owned EDF Group (Electricité de France), which is one of Europe’s largest energy companies. EDF generates around a fifth of the UK’s electricity and delivers energy to around 5m homes and businesses.

It claims to produce more low-carbon electricity than any other generator in the UK. Two thirds of EDF’s electricity comes from nuclear power, which it calls ‘blue energy’, and it owns eight nuclear power stations in the UK.

EDF Energy was formed in 2003 and says it plans to be ‘the champion of low-carbon growth’ and become more sustainable.

Find out if EDF Energy offers the cheapest energy deal for your home. Use Which? Switch to compare energy prices.

EDF customer score

EDF Energy is ranked joint 22nd out of 31 energy companies, rated by 8,761 members of the public, in the annual Which? customer survey. It’s the joint highest-ranked of the Big Six energy companies this year and the only one of them to get a four-star rating from customers for its bills.

‘EDF sends out information each year with graphs and charts, which I find quite helpful and easy to understand.’

EDF Energy customer

EDF score breakdown

The graphic below shows the breakdown of its score from our latest survey.

Scroll down to find out how EDF’s complaints handling compares with other suppliers, plus how its prices vary over time.

Find out how EDF compares with other energy companies – see the full results of the best and worst energy companies.

Which? verdict on EDF

EDF Energy’s customers were more positive about the accuracy and clarity of its bills than customers of the other Big Six firms.

‘The bills I have received seemed to be accurate and fairly easy to read.’

EDF customer

Customers were also positive about its customer service on the phone.

‘EDF helped me get a good fixed tariff but took a while to answer its phone.’

EDF customer

It was far from being the fastest to pick up the phone, however, as our snapshot investigation into energy companies’ phone and online customer service waiting times revealed. It took 19min 5sec on average to get through to a human when we phoned EDF’s customer service in September 2018. 

This was more than 10 minutes faster than Spark Energy, which took over 27 minutes on average. But it's way off the fastest firm, which took just 10 seconds on average.

You’ll get a faster response from live chat, according to our investigation. This saw EDF Energy respond to us in just 2min 40sec on average.

‘The one time I used chat I eventually achieved what I'd set out for.’

EDF customer

EDF and value for money

EDF Energy is considered marginally better value for money, along with Eon, than other Big Six suppliers. Its standard tariff isn’t the priciest of the Big Six, although it hasn’t offered the cheapest deals on the market over the last year.

‘It probably could be cheaper, but it is OK for me’

EDF customer

EDF guarantees that for tariffs with 'blue' in their name, the electricity a customer uses will be matched by low-carbon electricity generated by nuclear power stations.

EDF Energy and complaints

It received one of the highest levels of complaints per 1,000 customers in the first half of 2017. But managed to resolve three-quarters of these on the same or next working day.

‘When I requested a refund on balance of my account, it took a few attempts before they did so.’

EDF Energy

Pros: Fast live chat response, swift complaints resolution, good if you want low-carbon nuclear power

Cons: Room to improve on complaints, not for you if you aren’t keen on nuclear power

EDF Energy fuel sources

EDF Energy prices

The graph above shows how EDF’s variable (also known as standard) tariff, its priciest tariff and its cheapest tariff compared with the cheapest tariff on the market over a two-year period. 

If you are an EDF customer on its variable tariff, you have been paying a lot more for your energy than if you’d switched to its cheapest deal or another cheaper deal on the market.

In April 2018, EDF Energy announced a 1.4% increase in its standard variable electricity tariff from 7 June. Customers with this tariff will see their bills rise by £16 per year on average.

It also raised prices twice in 2017. In June, EDF Energy dual-fuel customers on its standard tariff saw bills rise by 7.2%. In March it increased electricity prices by 8.4%, although cut gas prices by 5.2% in January.

Are you paying too much for energy? Use Which? Switch to find the cheapest gas and electricity.

EDF Energy in the news


June: EDF Energy will pay £350,000 for missing its 2017 smart meter roll-out target. Suppliers must set their own installation targets which energy regulator Ofgem monitors. It said EDF Energy met its target in January 2018. The money will go to Ofgem’s fund to support customers in vulnerable situations.


September: EDF came joint 60th in a Which? survey of 100 best and worst brands for customer service, with a customer service score of 75%.