Cheap green energy
Switch your home to clean electricity with confidence thanks to our Big Clean Switch Guarantee. A typical home could save over £300*.
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Join the hundreds of thousands of households that have already made the switch

Why go clean?

All of the tariffs on our site guarantee that the power you use in your home will be matched by 100% renewable electricity. A typical home could save over £300* by switching to the cheapest renewable electricity deals.
* Prices sourced from EnergyHelpline and correct as of 6 February 2018. Saving compares the annual energy bill for an average usage dual fuel household on a Big Six Standard Variable Tariff paying by monthly direct debit with a single rate meter with the cheapest dual fuel tariff supplying 100% renewable electricity available through the Big Clean Switch website, again paying by monthly direct debit with a single rate meter. Prices are averaged across all regions of England, Scotland and Wales. Average usage as defined by Ofgem is 12,000 kWh pa of gas and 3,100 kWh pa of electricity.

Did you know

Our energy suppliers

New kids on the block who have arrived with a bang. Low cost and ranked number one energy company for customer service on Trust Pilot.

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A supplier with ethics at its heart, championing social equality, local renewables and stronger communities.

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One of Britain’s original green energy companies. They supply green energy to around 200,000 people in Britain from their fleet of wind and sun parks.

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The UK's local clean supplier. On average, customers are never more than four miles from one of their generation sites.

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Clean electricity from one of the UK's largest investors in solar power, with a commitment to 'simpler pricing and bills that actually make sense'.

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Tonik combine competitive pricing with a focus on helping you reduce the amount of energy you use in order to reduce your bills.

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Here are just some of the reasons why we like to recommend Bulb

Electricity fuel sources April 16 - March 17 projections

  • Hydro 99%
  • Biofuels 1%

Bulb is one of the most trusted suppliers in the UK, with an incredible TrustPilot score, consistently over 9.5. 

Bulb are independent, which allows them to keep prices low and give members exceptional service.

They believe energy should be low cost and easy to manage. That means a simple rate at prices up to 20% lower than the Big Six, no exit fees and dedicated support.

About Bulb:

  • Affordable, renewable energy:
    100% Renewable Electricity and 10% Renewable Gas sourced from independent UK generators.
  • Exceptional service: Easy online management, plus a UK-based account manager trained in all aspects of energy.
  • Fair & simple prices: A simple rate, no 12-month contracts and no exit charges.
  • First B-corp certified supplier: Thanks to Bulb’s social and environmental performance, accountability and performance standards


Here are just some of the reasons why we like to recommend Bristol Energy

  • Wind 47%
  • Solar 8%
  • Hydro 6%
  • Biofuels 38%

Bristol Energy helps you go green and give back. You’ll get one of the cheapest 100% green deals on the market. And Bristol Energy will reinvest its profits back into local communities.

Bristol Energy is publicly owned. With no private shareholders to keep happy, it keeps its prices low and puts fairness before profit.

There are no exit fees. And a Bristol-based customer care team. You can even visit us in person at our Hub if you’re local.

About Bristol Energy:

  • Affordable, 100% renewable electricity, sourced from independent generators across the UK
  • Simple, fair and transparent prices, with no exit fees
  • One of the first energy suppliers to voluntarily offer the Warm Home Discount to support their more vulnerable customers. Only available to customers in the Core Group. Find out more here: here
  • Monthly meter readings, so you only pay for what you use
  • They aim to keep their prices as low as they can. If they make a saving on the energy they buy, they pass that on to their customers
  • They’re owned by Bristol City Council, so the money you pay for your energy will help local communities
  • A national supplier, owned by Bristol City Council
  • A force for social good: Bristol Energy’s profits will be reinvested back into local communities. So you can use your energy to make a positive difference

    Note: Bristol Energy’s ‘My Green Plus’ gives you 100% renewable electricity. Bristol Energy’s other tariffs are not 100% renewable, but renewable energy makes up 40% of its overall fuel mix.
  • Accolades

    Here are just some of the reasons why we like to recommend Ecotricity

    Published Fuel Mix for 2016-2017

    • Wind 100%

    Ecotricity have award winning customer service and operate an ethical pricing policy, so everyone gets the same price, no matter how they pay or when they joined – with no exit fees or penalties.

    • One of the UK’s original clean suppliers
    • Committed to changing the way energy is generated and used in Britain
    • All profits go into their mission 
    • Built and run a national network of electric vehicle charging points



    Here are just some of the reasons why we like to recommend Good Energy

    Published Fuel Mix for 2016-2017

    • Wind 51%
    • Solar 27%
    • Hydro 4%
    • Biofuels 18%

    Good Energy is a clean energy pioneer which has been selling renewable power to UK households since 1999. They:

    • Source 100% of their electricity from renewables
    • Supply Green Gas, 6 percent of which is sourced from bio-methane
    • Run their own solar and wind sites, as well as investing in clean energy innovations such as the proposed Swansea tidal lagoon
    • Support over 112,000 homes and businesses generating their own energy through wind and solar

    In addition, they were named ‘best green electricity supplier’ and one of the UK’s most ethical companies of the last 25 years by Ethical Consumer Magazine. They were awarded Ethical Accreditation with a score of 100% by the Ethical Company Organisation for 12 years running and were named one of the world’s most ethical companies by the Good Shopping Guide. All of this is wrapped up in great service from their South West team, which is consistently highly rated by their customers, Which? and Martin Lewis’ MoneySavingExpert.

    You can find out more about them in their 2016 Progress Report.


    Here are just some of the reasons why we like to recommend Octopus

    Where Octopus gets its clean electricity

    • Solar 53%
    • Biofuels 47%

    Since 2011, Octopus has built more than 150 solar plants in the UK, making it one of the country’s largest solar investors. In fact, the solar farms they’ve funded generate enough electricity to power 250,000 homes (assuming the sun’s shining!). About Octopus:

    • Their Super Green Octopus Tariff offers 100% renewable electricity, together with full carbon offsets for gas.
    • They don’t charge exit fees to customers who want to leave and aim to offer clear, competitive pricing.
    • In addition to their investment in solar, they’ve also helped fund wind and anaerobic digestion plants (using the natural breakdown of organic waste to generate power).
    • They supply 100% renewable electricity to all of Arsenal Football Club’s facilities.
    Note: While you can be sure that the energy you buy through Octopus tariffs listed on this site is matched by 100% renewable electricity, they do have other tariffs available elsewhere that are not 100% renewable. Renewables currently account for around two thirds of their overall electricity mix.



    Here are just some of the reasons why we like to recommend Tonik

    100% clean

    • Solar 57%
    • Biofuels 43%

    Tonik Energy is on a mission to save you money. While they already offer one of the cheapest renewable energy fixed tariffs on the market their wider ambition is to halve their member’s energy bills by 2022. How? By harnessing technology. In their own words, “Our company is founded on the principle that smart technology can help you use energy more efficiently without sacrificing any of the comforts that make your house a home.” They have an impressive rating on online customer review site Trustpilot with comments including, ‘brilliant customer service’ and, ‘small company, massive respect!’. About Tonik:

    • They are one of the UK’s most affordable renewable energy providers.
    • They provide 100% renewable electricity as well as offering green gas and carbon offsetting for a small additional charge.
    • Their dedicated online customer portal called Tonik Space allows customers to view their balance in real time.
    • They pay 3% interest on their customer’s credit balance.
    • Their aim is to halve their member’s energy bills by 2022.


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    By clicking on the button above, you agree to our terms and conditions and to us getting in touch using the details you provide in order to help you switch to clean energy. For more info, see our privacy policy.