Sainsbury's Energy

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

E.ON Next supplies 100% renewable energy to customers under the Sainsbury's Energy brand name.

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

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 firms – click to see our full results of the best and worst energy companies.

Sainsbury's Energy customer review

Sainsbury's Energy was one of the better performers in our customer survey of 11,984 members of the public and received an above-average score when compared with the 16 suppliers we rated.

Its customers rated it an average of three stars in two areas, including ease of contact and customer communcations. However, it won four stars for its value for money,  the clarity of its communication to customers about energy prices, providing clear statements and accurate energy payments. 

Comments from customers were generally positive. 'They are quick to respond when you need their help and services are good' said one.

Customers also liked the way that customers can earn Nectar points. One customer commented: 'Electricity and gas is always there, any queries I have are answered immediately.  And I recently noticed I am getting Nectar points each month which is great'

Which? verdict on Sainsbury's Energy

• Pros: Customers can collect extra Nectar points; customers gave it a good rating for many aspects of service
• Cons: In the bottom half the table in our supplier assessment

Our Sainsbury's Energy supplier assessment

In September-November 2024 we looked at five aspects of suppliers' business practices and procedures: 

• Contacting your supplier – including how and when you can get in touch, and the quality of self-service help online
• How well they deal with complaints – how many complaints suppliers get and how quickly they resolve them
• Supporting customers who need it – including web accessibility, those in vulnerable situations, in financial difficulty, who use prepayment meters, and those who need materials in languages besides English 
• Switching – how easy it is for customers to switch
• Smart meter targets performance in 2023 –the most recent figures available.

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

Sainsbury's Energy was at the lower end of the scale in our assessment of its practices and procedures, coming in 13th place out of the 16 suppliers we rated, scoring 56%.

Its support for vulnerable customers scored well, with 11 points out of 12, but its customer service and complaints performance were unremarkable. It scored very poorly for meeting smart meter installation targets and for switching performance. 

Sainsbury's Energy customer service

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

However, it only scored five out of 13 points in our supplier assessment for the various methods of contact it provides to customers, two points lower than partner E.ON Next. Only two suppliers (EDF Energy and So Energy) achieved a similarly low score in this category. 

Sainsbury's lost points partly for its reliance on online customer service, with limited weekdays-only telephone opening hours.

Sainsbury's Energy common complaints

Of the Sainsbury's Energy customers in our survey, 8% said they contacted the supplier to make a complaint within the last year.

The most common complaint was regarding switching suppliers (33%). 

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 is 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 annual 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.