Cheap green energy
Switch your home to clean electricity with confidence thanks to our Big Clean Switch Guarantee. A typical home could save hundreds of pounds a year*.
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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

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

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The first major British supplier to be co-operatively owned, Co-op Energy give a share of their profits back to members and local 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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iSupplyEnergy is owned by Vattenfall, one of Europe's largest retailers of electricity and gas and a big investor in UK renewable energy.

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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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The 2018 MoneyFacts Energy Provider of Year, So Energy have a commitment to low prices and great service.

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Get to know... 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.


Get to know... Co-op Energy

Where Co-op Energy source their 100% renewable community electricity (may vary with fluctuation of generation within their community energy portfolio)

  • Hydro 1%
  • Solar 26%
  • Wind 73%

An energy supplier with community at its heart.

With co-operative values at their core, they’re not motivated by money or profits, but by being a responsible, ethical business that can make a positive impact on climate change. Better still, they’re a significant supporter of community energy in the UK – and their community tariff is the first we know of that matches the electricity you use with energy sourced from community projects.

Co-op Energy was also the first big-name supplier to start rolling customers onto a new fixed price tariff when their existing fixed rate comes to an end (rather than allowing them to drop onto an expensive variable rate deal), leading the industry into protecting customer’s prices.

Here’s what makes them different:

  • Owned by their members
  • Warm Home Discount and ECO Schemes available
  • Friendly UK-based call centre


Get to know... 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



Get to know... 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.


Get to know... iSupplyEnergy

Where iSupply sources its renewable electricity from (2017/18 projection)

  • Wind 100%

Thousands of new customers every month trust iSupplyEnergy to look after their energy. They focus on simplicity, fair prices and excellent customer service.

iSupply Energy is owned by Vattenfall, one of Europe’s biggest retailers of electricity and gas, with over nine million customers. They’ve invested over £3bn in UK renewables since 2008. Offering 100% renewable electricity is part of their ambition to be fossil free within one generation, and to help their customers power their lives in ever climate smarter ways. 

Here’s what makes them different:

  • They offer 100% renewable electricity
  • Fair and simple prices
  • A friendly, UK-based team
  • Online account management available 24/7 to allow you to provide meter readings, make payments and view statements

Get to know... 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.


Get to know... So Energy

Where So Energy source their renewable electricity

  • Wind 28%
  • Solar 41%
  • Biofuels 22%
  • Hydro 9%

So Energy are restoring trust in the energy industry by providing great value renewable electricity and focussing on giving outstanding service to their customers. 

Here’s what makes them different:

  • Moneyfacts 2018 Energy Provider of the Year
  • A ‘Low Price Commitment’ to keep their one fixed tariff within the cheapest 10% of all tariffs available
  • The only energy supplier to let customers vote where they source their renewable electricity from
  • Great customer service which has earned a 5-star Trustpilot rating
  • A Living Wage employer

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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.