The world is shifting towards renewable energy as people become more aware of the environmental impacts of traditional energy sources. With the UK government setting a target of net zero emissions by 2050, green energy companies are gaining significant attention. These companies are making strides in areas such as solar, wind, hydro, and other forms of renewable energy. Below are the 10 game-changing green energy companies in the UK that are making a difference in the fight against climate change:

Octopus Energy:

An emerging energy company that offers 100% renewable electricity and gas to over 2 million customers in the UK, as well as in other countries. Its cloud-based smart grid platform, which uses an innovative AI and data-based platform, helps balance loads around the grid. The company also uses smart metres and other technologies to track energy usage and provide customers with personalised advice on how to reduce their energy bills and carbon footprint. Overall, Octopus Energy is a company that is dedicated to making sustainable and affordable energy accessible to everyone.


Bennamann is a company founded in 2011 and located in Cornwall, England. They have developed technologies that allow the use of biomethane as a source of renewable energy. Bennamann has created a technology for storing methane that aims to bring about a revolution in clean energy at the local level. Their system is capable of extracting and storing biomethane, and then using it to generate fuel, heat, and electricity. The company aims to protect the environment and has a zero-carbon footprint. Bennamann is committed to minimising their environmental impact and adheres to the ISO14001 standard with the goal of achieving carbon neutrality by 2024.

Rebel Energy:

Founded in 2017 and located in London, England, Rebel Energy is a supplier of energy with a unique credit system that allows households to improve their credit rating while being supplied with clean, renewable energy.

Rebel Energy is an energy provider that offers environment friendly energy to households in the UK, all the while keeping prices reasonable.They aim to address inequality and combat the climate crisis.


A technology company that specialises in providing AI-powered solutions for enterprises to achieve their net zero goals. The company's Enterprise Net Zero Intelligence Platform is designed to help businesses digitise and accelerate their journey towards achieving net zero emissions.

The platform is built using the latest artificial intelligence and machine learning technologies, enabling it to provide businesses with real-time data analytics and insights on their carbon emissions. Thereby, enabling businesses to make informed decisions about their energy consumption and reduce their carbon footprint

Oxford PV:

The company focuses on the development and commercialization of perovskite solar cell technology. Perovskite solar cells are a type of solar cell that uses a perovskite material as the light-harvesting layer, that has the potential to significantly increase the efficiency and reduce the cost of solar energy.

The company has developed a patented technology that enables the perovskite material to be applied as a thin film onto silicon solar cells, which enhances their efficiency and enables a greater amount of electricity to be generated from the same amount of sunlight.

With significant investment and strategic partnerships, the company is well-positioned to scale up the production of its perovskite solar cells and make a significant contribution to the transition to renewable energy


Exagen Group aims to construct upcoming utility-scale solar farms that are situated alongside battery storage facilities that help balance the grid. The company was founded in 2017 and has quickly become a leader in the renewable energy industry.

The main aim of Exagen Group is to provide clean, reliable, and affordable energy to the UK and other regions. They use photovoltaic (PV) panels, which convert sunlight into electricity. In addition to solar farms, Exagen Group also focuses on battery storage facilities. These facilities are designed to store excess energy generated by solar farms during peak hours, and release it during periods of high demand. This helps to balance the grid and ensure that there is a steady supply of electricity to homes and businesses.

Highview Power:

It is a leading energy storage company that has developed a unique technology called the CRYOBattery. This innovative energy storage system is designed to provide reliable, sustainable, and cost-effective long-duration energy storage solutions to enable a 100% renewable energy future.

The CRYOBattery works by storing energy in the form of "liquid air". This process involves compressing air until it becomes liquid, which can then be stored in a tank at a low pressure. When energy is needed, the liquid air is released, causing it to expand and turn back into a gas, which powers a turbine to generate electricity. The CRYOBattery does not produce any emissions during its operation, making it a viable alternative to fossil fuels.

QiO Technologies:

An AI sustainability tech company that provides a sustainability suite to reduce greenhouse gas emissions.The company was founded in 2015 and is headquartered in Hampshire, UK. The company's sustainability suite consists of several cutting-edge AI-powered tools that enable businesses to measure, manage, and reduce their carbon emissions. These tools include an energy management system, predictive maintenance software, and a machine learning-based optimization tool that helps businesses reduce their energy consumption and carbon emissions.

H2GO Power:

A company that specialises in the development of hydrogen energy storage solutions. The company's mission is to provide clean, efficient, and sustainable energy storage options to power homes, businesses, and communities.

One of H2GO Power's most innovative solutions is that the company uses nanomaterials to create a flexible sponge-like material that can trap hydrogen atoms in its pores. This material acts as a high-capacity, low-pressure hydrogen storage medium, which can be used to power fuel cells.

Ocean Biofuels:

A company that specialises in developing and producing biofuels made from seaweed algae. The company's mission is to provide a sustainable supply of biogas, bioethanol, and organic fertiliser while reducing carbon emissions and promoting the use of renewable energy sources.

By using seaweed algae as a biofuel source, the company is helping to create a more sustainable and eco-friendly future.

The companies mentioned above are just a few examples of the many innovative and exciting initiatives that are emerging in the UK's clean energy sector. With government support and increasing public awareness of the importance of renewable energy, the potential for these companies to transform the energy landscape is immense. By harnessing the power of technology and innovation, these companies are paving the way towards a more positive time ahead.