Sainsbury's Energy

Sainsbury's Energy is a trading name under license to E.ON Next. 

Sainsbury's Energy customers can earn extra Nectar points on Sainsbury's shopping, and receive bonus Nectar points when signing up to eligible tariffs.

Its strong customer score, along with an above average score in our supplier assessment, mean that Sainsbury's Energy is a Which? Recommended Provider in 2026.

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

Sainsbury's Energy 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 Sainsbury's:

Here's how Sainsbury's Energy's customer and policy assessments break down:

Find out how Sainsbury's Energy compares with other energy suppliers: see our full results of the best and worst energy companies.

Which? verdict on Sainsbury's Energy

• Pros: A Which? Recommended Provider, having received strong scores in our satisfaction survey and independent analysis of its policies and practices; customers can collect extra Nectar points
• Cons: Doesn't do as well in our assessments for complaints, contacting your supplier, and switching

Sainsbury's Energy customer review

Sainsbury's Energy was one of the better performers in our customer survey of 11,945 members of the public, with its customer score of 76% putting it in joint 5th place out of 17 providers, along with Fuse Energy.  

It received four stars out of five in three of the seven areas we asked its customers to rate it on - overall customer service, ease of contacting, and clear statements. For everything else, including value for money, it got three stars. No supplier received more than three stars for value for money, which may reflect generally high energy prices at the moment. 

Comments from customers were largely positive. 'They make it easy to get support and I feel confident my queries will be handled properly.' said one.

Another commented that: 'Their service has been reliable, with clear billing and competitive prices, which gives me peace of mind'.

Sainsbury's Energy customer service

In our survey, customers rated Sainsbury's Energy's customer service highly, giving it four stars out of five. 

Only Sainsbury's Energy's fellow Which? Recommended Providers - 100 Green, E (Gas & Electricity) and Octopus Energy - matched this rating, with other suppliers receiving two or three stars. No provider got the full five stars. 

Sainsbury's Energy common issues and complaints

The most common issues experienced by Sainsbury's Energy customers over the last year were new energy meters having to be installed (17%), smart meters not sending readings automatically (13%), the supplier setting direct debit amounts too high or too low (11%), and accounts displaying an incorrect credit balance. 

Overall, 7% of Sainsbury's Energy customers made a formal complaint to the supplier in the last year.

Sainsbury's Energy supplier assessment

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

• 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.

Sainsbury's Energy came 6th out of 17 providers in our analysis of policies and practices.

It got the full ten marks for helping customers that need it, doing well in areas including digital accessibility, support for alternative languages, and support for deaf and blind customers. It also got a decent score of eight out of ten in our smart meter assessment. 

However, it was only mediocre in our contacting your supplier and complaints analyses, scoring about half marks for each. And it received a disappointing two out of five for switching performance. 

Can I join Sainsbury's Energy with a prepayment meter?

No. Sainsbury's Energy does not accept customers with prepayment meters. 

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

How sustainable is Sainsbury's Energy?

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.

Sainsbury's Energy is a trading name of E.ON Next. Find out how E.ON Next fared in our supplier sustainability assessment.

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.