100Green review

Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026

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Our verdict

100Green suits GB households that want renewable electricity and a free exit fee, with fixed terms set at 12 months and no charge to leave before the term ends. The offer covers both fuels, and the renewable supply sits behind a power purchase agreement.

Key facts

Best for
Households that want renewable electricity and a free exit fee.
Fixed terms
12 (Source, checked September 30, 2026)
Exit fee
£0 (Source, checked September 30, 2026)
Renewable share
100% (Source, checked September 30, 2026)
Renewable basis
Ppa (Source, checked September 30, 2026)
Export rate
£0.12 (Source, checked September 30, 2026)
Smart meter required
Yes (Source, checked September 30, 2026)
Markets
GB (Source, checked September 30, 2026)
Legal entity
Green Energy (UK) Limited (Source, checked September 30, 2026)
Headquarters
United Kingdom (Source, checked September 30, 2026)
Founded
2001 (Source, checked September 30, 2026)
Support channels
Phone, Email, Chat, Help-centre (Source, checked September 30, 2026)
Tariff types
Fixed, Variable, Green, Ev, Time of use
Fuels
Electricity, Gas
Official website
100green.co.uk

Apps and profiles

Elsewhere
LinkedInTrustpilotinstagram.comfacebook.com

Pros and cons

Pros

  • Renewable electricity at 100%, with the supply behind it coming from a power purchase agreement.
  • Own generation is rewarded: exports are paid at £0.12.
  • Both fuels come from one supplier, with electricity and gas covered on the same account.
  • Support runs on phone, email and chat, so a household can reach a person or self-service.

Cons

  • A smart meter is required for the electric vehicle tariff, so meter status decides who can take that plan.
  • Fixed terms run for 12 months only, so no longer fixed term is listed for anyone wanting a rate locked for years.
  • Supply covers GB only, so a household outside that market has to look elsewhere.
100Green

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Scored 9.3 / 10 by TariffCue.

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Who it suits

  • Households in GB that want renewable electricity and gas from one supplier.
  • EV drivers who already have a smart meter or are ready to have one fitted.
  • Anyone who may move mid-term and wants a free exit fee.

Who should look elsewhere

  • Powerpeers, for a dynamic tariff: 100Green's list is fixed, variable and green, while Powerpeers runs dynamic, fixed and variable.
  • Vattenfall, for a household that wants only fixed, green and variable choices, since Vattenfall lists fixed, green and variable without the vehicle and time-of-use options.

Core features

Renewable electricity is the whole point of the range, with supply running at 100% renewable. Households that generate their own power have a route to earn from it, since exports are paid at £0.12. The one condition to watch sits on the electric vehicle tariff, where a smart meter is required before the tariff can begin.

The company behind it

The supplier behind the tariffs is Green Energy (UK) Limited, based in the United Kingdom, and it has been trading since 2001. That history matters for anyone signing a fixed term and settling in for the duration. Support runs on phone, email and chat, so a household can reach a person as well as self-service.

How 100Green compares

Where 100Green is available

Available
United Kingdom

Countries from the brand (Source, checked September 30, 2026)

Frequently asked questions

What does 100Green supply?+

100Green covers both fuels, with electricity and gas available from the same supplier, so a household using both does not need two providers. Renewable supply applies to the electricity side, and gas is bundled into the same account for homes that want one relationship.

Is the electricity genuinely renewable?+

Electricity is listed as 100% renewable, and the basis for that claim is a power purchase agreement. The green offer is tied to contracted renewable generation, which is the part buyers of green tariffs tend to ask about before they switch.

Is there an exit fee if I want to leave?+

There is no charge to leave: the exit fee is £0. On that measure the supplier ranks 1 of 29 brands tracked here, which matters for anyone who expects to move home or switch again inside the term.

How long do the fixed tariffs run?+

Fixed terms run for 12 months, so a household can hold a rate for the stated period without a long commitment. That length suits renters and anyone who expects to move during the term, since leaving carries an exit fee of £0.

Which tariffs can I choose?+

The range covers fixed, variable and green, all under one supplier, so a household can move from a fixed deal to a variable or time-of-use tariff without changing provider. For comparison, Octopus Energy lists fixed, variable and green and Vattenfall lists fixed, green and variable.

Does the electric vehicle tariff need a smart meter?+

A smart meter is required for the electric vehicle tariff, so anyone planning regular home charging needs one fitted first. The EV option sits inside fixed, variable and green, so it is one choice within a wider range rather than a standalone deal.

What do I earn for exporting my own power?+

Exporters are paid £0.12 for the power they send to the grid, which turns a home generation setup into a small income stream rather than a cost. Combined with renewable supply at 100%, the arrangement suits households that already have panels or plan them.

How do I get help if something goes wrong?+

Support runs on phone, email and chat, so there is a live route and a self-service one. The supplier trades as Green Energy (UK) Limited and has been operating since 2001, which counts when a question concerns an existing account or a disputed reading.

Where does 100Green operate?+

Supply is limited to GB, and the company is based in the United Kingdom. There is no separate overseas proposition to weigh up, so anyone reading this is looking at a GB-only offer with both fuels available from the same account.

How does 100Green rate against other suppliers?+

The overall score is 9.3, made up of 9.4 on cost, 9.4 on offer and 8.9 on trust. Those parts line up with the rest of this review: a free exit fee, a broad tariff list and support on phone, email and chat.

Sources

Compiled from 7 source pages, checked September 30, 2026. We did not open an account.

100Green

100Green

Households that want renewable electricity and a free exit fee.

9.3/10See alternatives

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