100% renewable electricity

Woman with her eyes closed and smiling
What is 100% renewable electricity?

You’ll hear this phrase from your energy supplier, but honestly, not many people know what it is exactly. More often than not, people choose to ignore it (because of all the jargon everyone uses). Simply put, it means all of the electricity we provide you with comes from 100% renewable sources like wind, solar and hydro.

To do this we have supply agreements with independent UK wind generators and purchase renewable electricity certificates and Renewable Energy Guarantees of Origin (or REGOs). The electricity supplied to homes and businesses ultimately comes from the National Grid.

So what are REGOs?

Renewable Energy Guarantees of Origin are proof an energy supplier has bought a specific amount of energy from renewable sources.

We use REGOs to ensure the electricity we supply is backed by renewable sources. It’s as simple as that.

Why is it important?

We want to help our beautiful planet become a better place. A planet where everyone is working towards a zero carbon life. This is an easy and efficient way for everyone to get involved.

If all of us decided to change to 100% renewable electricity, it could literally save us thousands of tonnes of carbon emissions per year.

To be more specific, it can save an average household 1.2 tonnes of CO2 a year*.

Looking for more about sustainability in the energy sector?

You may find these links useful:

Government support for renewable energy

You can find out more about how Sainsbury’s are making a difference.

Sainsbury’s Energy is a trading name used under licence by E.ON Next Energy Limited. Registered office: Westwood Way, Westwood Business Park, Coventry

A full report on our fuel mix can be found here


Full FAQs



Electricity backed by 100% renewable sources. E.ON Next’s renewable generation assets, agreements with UK generators and the purchase of renewable electricity certificates. The electricity supplied to your home comes from the National Grid and DNOs. There are currently no environmental benefits to this tariff.

*We have worked this out by taking Ofgem’s average yearly consumption and multiplied that by a carbon factor. The carbon factor is calculated as the carbon intensity of the current published residual fuel mix. This figure is 0.377015kg CO2/kWh.