Good Energy tops new time-matched renewable power rankings
Good Energy has topped the rankings in a new independent public data index designed to help customers find the cleanest renewable electricity suppliers.
The Matched Clean Power Index published today (27 October 2025) highlights which energy suppliers are balancing renewable generation and customer usage in real time.
The index uses public data to calculate half-hourly renewable matching scores for UK energy suppliers. The results show a wide range of matching scores among suppliers, from 11% at the bottom to Good Energy’s market-leading 88%.
Being transparent about how power is sourced is fundamental to Good Energy’s ethos and led to a new set of standards through the Good Green Supply, which challenged suppliers on the validity of their 100% renewable electricity tariffs.
In addition to time matched performance, it shows the amount of power supplied to customers that is backed with actual purchases of renewable electricity, rather than just Renewable Energy Guarantees of Origin (REGOs), and how much of that power comes from new generators.
Regulations designed to scrutinise the origins of clean energy are failing to help grow renewables, damaging the public’s confidence in the sources of the energy they are buying to fuel their homes and businesses. REGOs can be used to claim solar power generated in summer is matched with customer usage at night-time in winter. In its clean flexibility roadmap, published in July, the government stated it would be assessing how REGOs impact the flexibility market, indicating reform may be considered.
Nigel Pocklington, Good Energy’s chief executive officer, said: “The false green labels some energy suppliers continue to sell to their customers can finally be given some transparency in this compelling new index into the true sources of clean power. Thanks to Matched for highlighting what our own government continues to overlook.
“It’s crucial that the public have confidence in the origins of clean power, which is what the current ‘REGO’ system is meant to achieve by certificating green supply. We need to evolve the system, so it reflects the time renewable electricity is produced.
“Many energy customers are being misled with renewable electricity tariffs rarely as green as they seem. We hope this much-needed scrutiny for the industry will nudge government towards establishing time-matched REGO certificates – which would help introduce genuine green tariffs across the market.”
Matched founder, Joe Kwiatkowski, added: “Leading suppliers now deliver clean energy when consumers actually need it – yet outdated rules leave their offers lost in a sea of identical but misleading ‘green’ claims. We built the Matched Clean Power Index to give consumers the clarity to find the cleanest electricity.”
Good Energy’s joined experts from Oxford, Imperial and other leading suppliers to contribute to the Matched methodology which supports the new index. The Matched Clean Power Index Methodology can be read here.
Notes to editors
Good Green Supply is comprised of three metrics which are important for determining the green credentials of an electricity supplier. These are:
True Green: The percentage of supply backed with power sourced directly from renewable generators, either through purchases, or from a supplier’s own generation assets. Good Energy’s supply is 100% ‘True Green.’
New Green: The proportion of power from renewable generators which are new to the grid. Good Energy’s supply is 36% ‘New Green.’
Time-matched Green: The amount of customers’ energy usage that is matched to renewable generation hour by hour. Good Energy’s supply is 90% time matched.
Media contacts
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About Good Energy
Good Energy has been at the forefront of the renewable energy revolution since 1999, helping homes and businesses to generate, use and share renewable electricity.
From supplying customers with 100% renewable electricity from over 3000 British generators, to serving over 180,000 people who generate their own clean power, Good Energy has built a reputation for supporting independent renewable generation.
Today, Good Energy also installs clean technology such as heat pumps, batteries, EV chargers and solar panels, including a nationwide commercial solar installation service. It also offers flexible tariffs for EV drivers and heat pump owners, as well as competitive export rates ensuring solar generators get paid fairly for the power they share. Good Energy is a Which? Eco Provider for Energy, is rated 5 stars by customers on TrustPilot, and is Britain’s only B Corp certified home energy supplier.
Good Energy is part of the Esyasoft Group. Esyasoft is a Dubai-headquartered global business specialising in manufacturing state-of-the-art internet of things devices and providing a suite of software solutions designed to enhance energy distribution and management. It is ultimately owned by International Holding Company PJSC (ADX:IHC), an Abu Dhabi-based publicly listed holding company.