E.ON Next

E.ON Next says it is focused on making it easier for customers to change their habits and work towards sustainable goals. We've asked its customers what they really think, and assessed how well it supports its users.

The brand is part of the German-owned E.ON Group, which is one of Europe's largest operators of energy networks and energy infrastructure. E.ON took on around 2 million former Npower customers in 2021, and is the third-largest of what used to be known as the 'Big Six' UK energy suppliers, after Octopus Energy and British Gas.

Below, we take a closer look at how customers rate E.ON Next, plus our own expert assessment of the brand's business practices and procedures.

Compare energy prices using our free tool to see if you could spend less. 

E.ON Next score

We combine the results of our customer survey with an in-depth assessment of companies' behind-the-scenes practices and policies to give you an overall view.

Take a look at our table below to see our score breakdown for E.ON Next:

Here's how E.ON Next's customer and policy assessments break down:

Find out how E.ON Next compares with other energy companies – click to see our full results of the best energy suppliers.

Which? verdict on E.ON Next

• Pros: Very good at supporting customers who need it
• Cons: Below-average customer score in our survey, room for improvement in its complaints handling

E.ON Next customer review

E.ON Next was ranked in the lower half of the table of the 17 energy companies rated in the Which? energy customer survey of 11,945 members of the public. It received a customer score of 66%, putting it just below Ecotricity with 67%.

Just four companies received worse customer ratings than E.ON Next: British Gas (65%), EDF Energy (65%), Scottish Power (62%) and Ovo Energy (61%).

Customers gave E.ON Next just a two-star rating for all but two of the areas measured. They awarded it three stars for how easy it is to contact and the accuracy of its payments. British Gas, EDF Energy, Scottish Power and Ovo Energy also scored two stars for customer service.

One respondent who is an E.ON Next customer told us: 'Overall they are not a bad supplier. Some things could be more clear and, obviously, energy prices could be better but I have no big problems with them.'

Another said: 'I'm satisfied, but they could be better, although they are a great deal better than some of the horror stories I hear elsewhere.'

Ultimately, the brand's results in the customer survey are best described as middling.

E.ON Next customer service

Customer service doesn't appear to be a stand-out strength, as the provider received a two-star rating.

Four suppliers in our survey achieved four stars – E (Gas & Electricity), Octopus Energy, Sainsbury's Energy and 100Green. No company achieved a maximum five-star score.

In our supplier assessment of its customer service when you contact it, E.ON Next scored 7 out of 12.

E.ON Next common complaints

When we asked E.ON Next customers, 6% of those who said they had engaged with the company in the past year did so to make a complaint.

The brand performed poorly for value for money in our latest survey and we saw a selection of comments related to this. One customer told us: 'They are a reputable company. However, like many other energy suppliers their prices are way too high, and they just keep increasing.'

Another said: 'Just so expensive overall, but I think that is across the whole energy supplier sector.'

We also saw comments tied to smart meters, with one customer explaining: 'Too much pushing me to have a smart meter. Already discussed with a rep and explained my decision but still receiving frequent demands by letter and email to arrange for fitting of the meter.'

Another survey respondent said: 'Too many annoying phone calls about smart meters.'

Our E.ON Next supplier assessment

In September-November 2025 we looked at five aspects of suppliers' business practices and procedures. Examples of some criteria within each category include:

• Complaints – how many complaints suppliers get and how quickly they resolve them
  
• Contacting your supplier – including how and when you can get in touch, call waiting times, and the quality of self-service help online
• Help for customers who need it – including those in vulnerable situations, those who use prepayment meters, those who need materials in languages besides English, and web accessibility 
• Smart meters – including performance against 2024 smart meter targets and the proportion of customers' smart meters actually operating in smart mode
• Switching – how well suppliers handle switching.

We did this using a combination of the responses to a survey we sent to suppliers and our own assessments.

E.ON Next finished in the middle of our Which? assessment score table with an overall score of 65%. Sat beneath the brand are 100Green (61%), Ovo Energy (60%), Good Energy (57%), Fuse Energy (56%), British Gas (52%), EDF Energy (50%), Scottish Power (50%) and So Energy (44%). In contrast, the top scorer was E (Gas & Electricity) with 79%.

The brand's key strength is its willingness to help those who need it and E.ON Next scored 9 out of 10 in our assessment. There is room for improvement in other areas, however – it scored 8 out of 15 for how it deals with complaints and 2 out of 5 for switching.

Can you join E.ON Next with a prepayment meter?

Yes, E.ON Next can supply customers with pay-as-you-go meters.

• You can top up your credit at a Payzone, PayPoint or Post Office outlet. If you have a smart prepayment meter you can also top up online or via the E.ON Next app, and you'll be able to keep track of your balance using the website, app or your in-home display.
• If you have less than 50p in credit remaining on your electricity meter, you can get emergency credit of £5 from E.ON Next but this will be changing to £10. For gas you can get £10 of emergency credit if you have less than £2 remaining. You'll pay the emergency credit back when you next top up.

Not sure if you should prepay? Find out: Is prepayment energy right for you?

How sustainable is E.ON Next?

Sustainability credentials are important when choosing an energy supplier for two thirds of those responsible for choosing their provider. That’s according to our online survey of 3,000 UK adults in August 2024.

So we factor in a range of sustainability criteria in our Eco Provider assessment. We are next running this research in 2026.

Here’s how E.ON Next fared:

• Proportion of renewable electricity sold to customers: 85.5%
• Doesn't generate renewable electricity, but some of its other UK subsidiaries do. It also buys some renewable electricity directly from generators that don't get government subsidies, helping support them.
• Offers a time-of-use tariff for EV drivers, with discounted overnight charging rates.
• Offers installation of solar PV, battery storage, heat pumps, insulation and EV chargers.

Find out more about the differences between energy companies renewable electricity, and find out how we assessed energy suppliers for sustainability.

Based on information supplied by companies in August 2024 and their most recent published fuel mixes, where available.

Making your home more energy efficient will save money on your bills in the long term and lower your carbon footprint. Get started with our guides to home energy efficiency.