Green energy

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What is green energy?

Environmentally friendly

Competitively priced

More popular than ever

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There are several ways to do your bit for the planet with green energy. You can opt to buy your gas and electricity from a specialist green energy company, or you can ask your current supplier to increase the amount of energy from green sources your household uses.

Green energy suppliers include the likes of Green Star Energy, Ecotricity, Green Energy, Bulb and Octopus. These companies encourage app-based account management and may offer paperless billing by default. Some green suppliers produce 100% of their electricity from zero-carbon sources.

Mainstream suppliers also offer green energy tariffs, which guarantee that some, most or even all of your energy comes from ecologically-friendly source. You can check how much renewable energy a supplier produces by looking at its ‘fuel mix’ information. This shows how much of the power they sell has come from coal, gas, nuclear, renewable and other sources, so you can see how green they really are.

Wind turbines

How is green energy generated?


Wind power

Large windmills attached to turbines are placed in windy areas to generate electricity as they turn


Solar power

Special photovoltaic panels are set up in hotter places, and turn the sun’s energy into electricity


Hydroelectric power

Dams built over large rivers can be used to control the flow of water, directing it through generators with gravity


Tidal power

The moon’s gravitational pull is incredibly strong, and power is generated as the tides change



Burning biological material such as plant matter and waste food as a fuel source is efficient, though it does generate emissions



Captured heat coming up from deep within the earth can generate electricity by heating water into steam to drive turbines

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What is green energy?

Green – or renewable – energy is any energy generated from natural sources. In practice, this means anything that isn’t a burning a fossil fuel like coal, oil and gas.

However, not every renewable source is carbon-neutral. Burning biofuels still puts out emissions, though these tend to be cleaner in comparison to fossil fuels.

Green energy is often known as renewable because it is generated without using finite resources. Whether your renewable energy is generated from the wind, the tides or the heat of the sun, it’s much more abundant than fossil fuel, of which there is a finite supply.

Does nuclear power count as renewable?

While nuclear energy is a low-carbon source of energy because it has an extremely limited impact on climate change, it is not considered ‘green’ or ‘renewable’.

Nuclear power is still generated with fuel, commonly uranium or plutonium, that exists in finite amounts on Earth. It also leaves behind very dangerous waste which can be lethal for thousands of years, and which is very expensive to deal with. That said, it’s much less bad for the environment than coal or oil.

Is green energy more expensive?

Green energy tariffs are now extremely competitive as the technology improves and more people start asking for renewable energy. This will only continue, especially as solar panels fall in price and increase in efficiency.

Of course, fossil fuel prices fluctuate too, so it’s hard to say which fuel source is the absolute cheapest. What’s clear these days, though, is that you won’t be paying through the nose to go green.

How do you switch to green energy?

Switching energy suppliers has never been simpler thanks to the Energy Switch Guarantee, which automates the process for customer and allows you to move provider within 21 days with no interruption to service.

There are hundreds of tariffs available on the market today, and MoneySuperMarket’s price comparison service can help you find the supplier and tariff that are right for you.

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Why use MoneySuperMarket to switch your energy?

You could save hundreds of pounds by switching your gas and electricity to a cheaper tariff through MoneySuperMarket.

We help you compare prices from all the energy suppliers in the UK, so you can find the cheapest deals in the market.

It only takes a few minutes to find a cheaper energy deal.  All you have to do is answer some simple questions, and we'll show you tariffs and offers from all the energy companies. We’ll also show you how much you could save by switching to each tariff, to help you choose the best one for you.

We can help you switch to tariffs from most companies directly through MoneySuperMarket.  Just click the green button, answer a few more questions, and you’re done.

If you’d prefer to talk to someone, you can call us on 0800 177 7087. We can answer any questions you might have, and even switch you to a new deal over the phone.

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