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Top 5 Green Energy Suppliers & Guide

Green Energy Suppliers Guide

What’s in this guide?


Long ago, if you wanted to have green energy from suppliers, you’d have to pay a premium price, but thanks to modern advancements in renewable energy generation, you can reduce your carbon footprint and have one of the cheapest energy deals on the market.

Yes, really.

This guide will tell you everything you need to know about green energy suppliers, including precisely what green energy is, who the best suppliers are and how much you can expect to pay.

  • 100% renewable energy supply
  • Green energy helps you reduce air pollution and carbon footprint
  • You can earn money through the Feed-in Tariff scheme
  • 85% of people in a recent survey said they support using green energy

So, here we go!

What is Green Energy?

You can produce green energy in an environmentally-friendly and sustainable manner.

Sustainable energy can easily regenerate and cannot be exhausted like fossil fuels such as coal.

One main advantage of green energy is that it produces and releases lower levels of pollutants into the environment while reducing the carbon footprint.

The UK has its eye on future energy independence, which means that Britain will be able to generate all the energy it needs without having to outsource from other countries.

Currently, the focus is on producing green electricity in the UK.

There are hundreds of renewable generation farms in the UK that include wind farms, solar power, hydropower and more, powered by many independent generators as well as significant energy companies such as SSE.

Green gas, consequently, is still under research. There are, however, some suppliers who are producing it on a small-scale level.

Let’s now explore how to produce green energy.

How is Green Energy Produced?

There are different ways to generate green power:

  • Wind: Wind power generates electricity with the help of wind turbines. There are many offshore and onshore wind farms across the UK.
  • Hydro: Electricity is generated using moving water.
  • Solar: Heat from the sun converts into electricity with the help of solar panels.
  • Biomass: This type of energy involves the use of organic materials such as animal, plant, and wood waste to produce green gas. It produces mainly biodiesel and ethanol.
  • Geothermal: The earth’s heat produces geothermal energy.
  • Tidal Power: Tides are as a result of the gravitational pull of the moon. Changing tides produce energy.
  • Wave power: The wind causes waves. Wave power comes from the oceans, lakes, rivers, and canals.

Find the best green energy deals using an energy comparison website

What Percentage of Electricity of the National Grid is Green?

Bulb chart

To the left, you can see a chart showing the percentage of green energy electricity in the national grid vs a 100% renewable energy company, Bulb.

Bulb has one of the most affordable tariffs on the market, proving that green energy doesn’t have to cost more.

Renewables come in second after gas in the UK average. This shows the strides that energy suppliers are making towards providing green energy to domestic and business customers.

Is there a way to verify if the energy suppliers do supply green energy as they say? There is, and this is how.

What is OFGEM’s Role in Green Energy Supply?

Ofgem, UK’s gas and electricity market regulator, has a Green Energy Supply Certification Scheme in place.

Because of this, energy providers volunteer themselves to Ofgem’s audits and checks to certify themselves as ‘green.’

Note: OFGEM has certified not all green energy suppliers in the market. This does not, however, mean that these companies do not supply their customers with environmentally friendly energy.

How Green is the UK Energy Providers?

First of all, before switching to an energy supplier for green energy, there are some factors you need to consider as highlighted below.

What Percentage of The Green Tariff is Renewable?

  1. Some suppliers like Green Energy supply 100% renewable energy for both electricity and gas.
  2. Most of the green tariffs available in the market are 100% green for electricity while offering a small percentage of renewable energy for gas or none at all. This is mainly because producing green gas is costly.
  3. Some suppliers promise to offset the emitted CO2 through other means. For example, Octopus Energy plants trees to reduce the CO2 emitted while Good Energy lowers deforestation activities in Asia. Even though this is highly commendable, it doesn’t always mean that the energy supplied by some of these companies is green.
  4. Some energy suppliers with green energy tariffs also provide partially green or non-green tariffs. Examples of such companies are OVO Energy, Bristol Energy, and Octopus Energy. You will have to decide if you are okay with this.
  5. Some green energy providers don’t supply energy to customers using pre-payment meters.

It does entirely depend on your personal preferences and how passionate you are about supporting green energy companies.

How Do the Main Green Energy Suppliers Compare?

Energy Supplier Green Tariff(s) % of Green Electricity % of Green Gas Type of Fuel Does it Provide Other Non-Green Energy Tariffs?
  • Life Energy
  • Positive Energy v2
100% 0% Single and dual fuel No

  • Vari-Fair
100% 10% Singular and dual fuel No
LoCO2 Energy
  • Planet
100% 10% Single and dual fuel No
Green Energy  

  • Sparkling
  • Tide
  • Still
  • Tap and Still
100% 100% Singular and dual fuel except for Tide that only offers dual fuel No
OVO Energy  

  • Greener Plan
100% 0% Electricity only and dual fuel Yes, however, all tariffs have not less than 33% renewable energy
Octopus Energy
  • Green
  • Super Green
100% 0%

Super Green is involved in tree planting to offset the CO2 emitted

Single and dual fuel except for Super Green that only offers dual fuel Yes
Bristol Energy
  • My Green Plus
100% 0% Electricity only and dual fuel Yes, however, the tariff uses 24.3% renewable energy
Good Energy
  • All tariffs
100% 6%

Good Energy supports carbon reduction programs in Vietnam, Malawi, and Nepal

Single and dual fuel No

 Next, we find out the source of fuel for green energy suppliers.

Which Renewable Energy Sources Do Green Suppliers Use?

There are different sources of energy as indicated below.


  • AD means Anaerobic Digestion. The AD process creates Biogen.
  • Organic matter like manure and sewage produces Biomethane gas.
  • Biomass fuel is produced from organic matter like wood. 
Energy Supplier Green Tariff(s) Source of Renewable Electricity Source of Renewable Gas
  • Life Energy
  • Positive Energy v2
It does not have a defined fuel mix.

Uses hydro and solar energy.


  • Vari-Fair
74% hydro

26% AD

90% non-renewable

10% biomethane

LoCO2 Energy
  • Planet
31% AD

29% hydro

27% wind

13% solar

90% non-renewable

10% biomethane

Green Energy  

  • Sparkling
  • Tide
  • Still
  • Tap and Still
Depends on the tariff.

Sparkling tariff is 100% renewable.

Combined power and heat breakdown of Green Energy is 70.58%

Other energy sources are:

20.42% AD

6.04% waste

1.47% solar

1.15% hydro

0.34% wind

Depends on the tariff.


Sparkling tariff is 100% renewable.

Combined power and heat breakdown of Green Energy is 70.58%

Other energy sources are:

20.42% AD

1.47% solar

1.15% hydro

0.34% wind

OVO Energy  

  • Greener Plan
56.8% hydro

34.6% wind

3.5% geothermal

3.3% biomass

1% solar

0.6% waste

0.2% landfill gas

Octopus Energy
  • Green
  • Super Green
71% AD

29% solar

Bristol Energy
  • My Green Plus
42% wind

27% AD

19% hydro

12% solar

Good Energy
  • All tariffs
53% wind

24% solar

19% AD

4% hydro

94% non-renewable

6% biomethane


Eager to find a reliable green energy supplier? Fill our simple form at the top of the page then we’ll do the rest for you.

So, what are the tariff rates of Green Energy? Let’s find out.

Green Energy Tariff Rates

The following are tariff rate estimates for green energy:

Fixed Charge/Day Unit Charge in Pence/kWh (23:00-06:00 weekdays) Charge in Pence/kWh (06:00-23:00 weekdays) Unit Charge in Pence/kWh (23:00-06:00 weekends) Charge in Pence/kWh (06:00-23:00 weekends)
24p 4.99p 24.99p 4.99p 11.99p

Almost all energy providers have different prices for green energy.

Below are the estimated rates across the tariff plans from various energy suppliers.

The Cheapest Top 5 Green Tariffs

The average annual cost for a household that has a 3100kWh usage of Ofgem medium of electricity with 12500kWh of gas, using dual fuel and paying monthly using Direct Debit.

Energy Supplier Tariff Tariff Type Annual cost (Average) Exit Fee
Tonik Positive Energy v2 Set for 12 months £880 N/A
Bulb Vari-Fair Variable £910 N/A
Octopus Green Octopus Fixed for 12 months £925 N/A
Bristol Energy My Green Plus with Paperless Billing Set for 12 months £951 N/A
LoCO2 Energy Planet (Fixed Direct) Fixed for 12 months £960 £25/fuel

 More estimated green energy rates from other suppliers are as shown in the table below.

Energy Supplier Annual Costing
Co-operative Energy £807
Ovo Energy £959
iSupply Energy £1,090
Green Network Energy £1,050
Engie £1,040
Ecotricity £1,221
Avro Energy £727
Good Energy £1,064

The ideal way to ensure you get the best possible green energy deal is by performing a price comparison with us.

With just a couple of details and the easy click of a button, we will find you the most affordable green energy supplier for you.

What is A FIT (Feed in Tariff) Scheme?

This is a government scheme aimed at benefiting energy consumers.

If you install renewable energy generators to your property like solar panels, you will get money for the energy you produce as well as lowering your monthly energy costs.

The advantages of the FIT scheme are:

  •  This scheme will get you a subsidy for almost 20 years
  • Homeowners/businesses get paid to produce electricity

 Has Green Energy become More Popular?

In recent times, more and more people are embracing the concept of green energy.

For instance, 85% of individuals in a 2018 survey by the Department of Energy and Climate Change supported the use of renewable energy compared to 79% the previous year.

Also, 74% of the people in the survey said they were concerned about the effects of climate change.

Which is 3% more than in 2017.

This was according to consumer research comprising 2,005 people aged 18 years and above.

Is it worth it to switch to green energy? Most definitely. Let’s find out more.

Why Should I Switch to Green?

✔Conserve your environment
✔Potentially save money on your bills
✔Support green energy companies
✔Help renewable energy generators

How Do You Switch to Green Energy?

It’s quite simple really.

By calling EnergySeek or filing the quick and easy form at the top of the page, you will be able to find the cheapest and best green energy tariff available in the market from reliable energy suppliers. As a result, potentially saving money and the planet.


Do you want to switch to a green energy supplier?

Take a look at the EnergySeek guides to find out more about your energy, or see reviews of the top 7 energy switching sites to compare gas & electricity.