100Green Wind Turbine

Always 100%
green; keeping
life simple

Always 100% green; keeping life simple


The energy in all our tariffs comes from 100% green & renewable sources.


Anaerobic Digestion

Turning waste into energy




Solar power

Energy from 93 million miles away




Wind power

An invisible force





That’s plants to you and me




Hydro power

Harnessing the Great British weather





Anaerobic digestion is a process where microorganisms break down organic material in the absence of oxygen to produce biogas.

This can be burnt to produce energy, making good use of waste and preventing methane (a gas 20 times more toxic than CO2) leaking into the atmosphere. And what’s more, the nutrient–rich solids left after digestion can be handily used as a fertiliser.

We’re proud to say all our gas is 100% green!



A solar cell (or a ‘photovoltaic cell’ to you scientists out there) takes the light from the sun and converts it into electricity.



Our suppliers use the force of the wind to drive turbines, which in turn make electricity.

The energy generated for our EKO Energy Tariff means that our suppliers need to ensure that their wind farms are located away from bird migration paths – making it uber–environmentally friendly.



Biomass is essentially organic material.

We get the feedstock from plants, from waste products from industry and agriculture – or your very own home.

This waste could be called unpleasant, but the energy produced is clean and renewable because unlike fossil fuels, it hasn’t been locked up underground for years – and let’s not forget, humans will always create waste!

We like the fact we can make something ‘good’ from something ‘bad’.

Whether it’s through anaerobic digestion or heat processing, the biomass is converted into clean, renewable electricity.



Hydro–electricity takes the force of free–falling water and converts it into power.

Some of our energy comes from small hydro–electric schemes in Scotland.

We really do care about the impact even our green energy has on the environment. That’s why all the electricity for our EKO Energy Tariff is generated in locations where migrating fish are protected.







Variable or Fixed
Green Tariff


No offsets. No gimmicks. Just the UK’s only 100% green and renewable energy for people who genuinely care about their impact on our environment.


Fixed Term
Premium Green Tariff


The UK’s only tariff to be independently eco–labelled meaning it’s generated in locations where wildlife is safeguarded. Perfect for people who want to do even more to protect our natural world.


A Time–of–Use
Green Tariff


The UK’s first true time–of–use tariff. For people who can significantly shift their demand for electricity away from peak times. Ideal if you have an electric vehicle, solar panels and/or energy storage.


High Tide Saver Deckchairs

High Tide Saver

100Green customers can save money and protect our planet by helping the UK shift demand for electricity away from peak times.

High Tide Saver Deckchairs

Receive credit on your 100Green account for each unit of energy you don’t use during High Tide Saver events.

100% Green Gas


We’re the UK’s only supplier of 100% green gas

Produced using a mix of natural waste and organic material, our 100% green gas makes all of our tariffs truly sustainable.

Does your home have solar panels?

We’re always looking for green energy generators – whether it’s solar, hydro or any domestic–scale renewable energy installation.

If you are a 100Green customer then we’d love to talk about buying the excess energy you generate.



How can I be sure I’ll get a reliable energy supply?

The entire industry is regulated by Ofgem (Office of Gas and Electricity Markets), who make sure that customers of all energy suppliers receive a reliable and uninterrupted supply.

If you have ongoing supply issues then this is the responsibility of our network partners.

Details of your local distribution network can be found in our Customer Promise which you can download here.

What is your energy fuel mix?

Our Gas

All our gas comes from a process known as Anaerobic Digestion - it is therefore 100% green. We’re the only supplier in the UK to offer this to all our domestic and commercial customers.

Our Electricity

Industry regulations require us to display our electricity fuel mix as per the table below. In a nutshell, our electricity is 100% renewable.

100Green fuel mix
1st April 2022 - 31st March 2023
Coal 0%
Natural Gas 0%
Nuclear 0%
Renewables 100%
Other 0%
UK fuel mix
1st April 2022 - 31st March 2023
Coal 3.40%
Natural Gas 39.30%
Nuclear 13.90%
Renewables 40.80%
Other 2.60%

And here is the environmental impact of our tariffs compared to the UK average.

100Green impact
Carbon dioxide emissions 0.00g per kWh
High level radioactive waste 0.000g per kWh
UK fuel impact
Carbon dioxide emissions 186.00g per kWh
High level radioactive waste 0.007g per kWh

For further information on the impacts of the UK average fuel mix see: https://www.gov.uk/government/publications/fuel-mix-disclosure-data-table/fuel-mix-disclosure-data-table

Do you Carbon Offset your energy?

No, we don’t need to! All our energy is green and renewable from the source.

Carbon offsetting schemes have done wonders to raise awareness of our impact on the environment. But they’re not ‘get out of jail free’ cards. Reducing our reliance on fossil fuels is our focus – not offsetting the impact.

How can you prove your energy is 100% green?

For our electricity, we have a REGO certificate (Renewable Energy Guarantees Origin) for every MWh we supply.

For our gas, we have Renewable Gas Guarantees of Origin (RGGOs).

These certificates prove to the final customer that the energy was produced from renewable sources.

The electricity certification process is audited annually by Ofgem the regulator of the Energy Industry.

And our gas is certified by the Green Gas Certification Scheme (and our EKO Energy Tariff is additionally certified as sustainable, by an independent ecolabel, (EKOenergy.org). You can find out more about EKO Energy here.

Do you generate your own energy?

No, we don’t. We have a fantastic network of generators. They generate our energy in weird and wonderful ways to meet the ever-growing demand for green and renewable energy across the UK. You can read more about our energy here.

I’ve heard that the generation of some green energy damages wildlife habitats. What about yours?

As the UK expands its ability to generate more and more green energy, these are the sorts of challenges our industry faces.

Our EKO Energy Tariff has been independently certified to be generated in locations that protect bird and marine migrations and wildlife habitats.

So it’s perfect for people who want to do more to protect our natural world.

You can find out more about our EKO Energy Tariff here.

Can I buy just gas from you?

Not at the moment, no. We sell dual fuel (gas and electricity) or you can buy just electricity from us.