in partnership with the 721 Challenge


Switch, Save, Raise

Switch to a low cost green energy tariff from one of the UK’s most trusted suppliers and raise £35 for the 721 challenge and our charity partner, World Land Trust.

What would you like a quote for?

By clicking on the button above, you agree to Big Clean Switch's terms and conditions and to us using any contact details you provide to communicate with you. You can find more information on how we handle your personal data in our privacy policy.


✓ Most homes save hundreds of pounds

✓ Greenwash-free

✓ Every switch backed by our customer service promise  

Rated 'Excellent' on TrustPilot

“I have always wanted to change to a renewable energy company but was daunted by the process. Big Clean Switch made it very easy and answered all of my questions politely and patiently! The chat box helpline was fantastic and the same advisor helped me right up until I had switched.”

Help the race against climate change

“As an international mountaineer I’ve been able to witness our impact on the natural world firsthand. 721 Challenge is a world record attempt, with the aim of bringing attention to our environmental responsibility and raising funds for the conservation of our planet’s most precious resource: its rainforests. That’s why I’ve partnered with Big Clean Switch, because their goals are in line with what we should all be striving for—a brighter, more sustainable future.”
Nick Hollis, Adventurer, 721 Challenge

What is green energy?

‘Green energy’ means power generated from the elements – sun, wind, water (rivers, tides or wave power) and biofuels (gas released by rotting food and agricultural waste). Unlike dirty electricity generated by burning fossil fuels (oil, coal and gas), green energy is renewable and has little impact in terms of climate change and air pollution.

How do green tariffs work?

Renewable power sources like wind turbines and solar farms all feed their energy into the National Grid, like rivers running into a big lake. When you switch to a green tariff, your supplier guarantees that however much electricity you take out of the ‘lake’, the same amount of renewable electricity will be pumped in. The more people who switch to green tariffs, the cleaner the lake gets.

Free energy bill health-check

Prefer to speak to someone? Book a call at a time that suits you with one of our friendly Energy Assistants – we’ll talk you through your quote, explain the differences between different suppliers, answer any questions you may have, and help complete your application if you decide to go ahead.

Still got questions?

Use our live chat, or email us at Or, if you’d rather speak to someone at a time that suits you, book a call back from one of the friendly Big Clean Switch team, here.

Our energy suppliers

From new kids on the block to one of the UK's biggest suppliers. Low cost power with a customer service score to die for.

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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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The world’s first green energy company. Offering 100% renewable electricity from the wind and sun and carbon neutralised gas.

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Green power and excellent customer service make GoTo a great choice, particularly for higher energy users.

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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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Ranked top 5 for customer service by Citizens Advice, one of only three suppliers recommended by Which? in 2020 and a five star rating on Trustpilot.

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