{"id":7254,"date":"2025-11-14T13:40:25","date_gmt":"2025-11-14T13:40:25","guid":{"rendered":"https:\/\/www.goodenergy.co.uk\/business\/?p=7254"},"modified":"2026-01-28T11:15:58","modified_gmt":"2026-01-28T11:15:58","slug":"why-transparency-matters-in-renewable-power","status":"publish","type":"post","link":"https:\/\/www.goodenergy.co.uk\/business\/insights\/why-transparency-matters-in-renewable-power\/","title":{"rendered":"Why transparency matters in renewable power"},"content":{"rendered":"\n

The renewable energy market has never been more crowded, or more confusing. Across the UK, many suppliers claim to offer \u201c100% renewable\u201d power. But how do you know which of those claims are genuine, and which rely on clever accounting?<\/p>\n\n\n\n

That\u2019s the problem the Matched Clean Power Index<\/a> set out to solve. By analysing public data, it ranks suppliers on how well they align renewable generation with actual customer demand. Good Energy topped the index, showing that when it comes to renewable transparency, we\u2019re setting the standard for truly green power. Here\u2019s how, and why it\u2019s important.<\/p>\n\n\n\n

Is all renewable supply the same?<\/h2>\n\n\n\n

No – while many suppliers advertise 100% renewable electricity, the way that power is sourced and when it\u2019s matched to your usage can vary significantly. <\/p>\n\n\n\n

Most suppliers rely on paper certificates known as REGOs (Renewable Energy Guarantees of Origin) to certify their electricity as \u2018renewable\u2019. These certificates can be bought separately from the actual electricity they represent, and they don\u2019t have to match the time the electricity is generated. <\/p>\n\n\n\n

This means that a supplier can legitimately label the power used on a dark winter evening as renewable, by buying REGOs from solar generation in the summer.  <\/p>\n\n\n\n

We believe this is misleading, and it doesn\u2019t support a greener electricity grid that matches how homes and businesses are actually using power.  <\/p>\n\n\n\n

Introducing the Matched Clean Power Index<\/h2>\n\n\n\n

The Matched Clean Power Index<\/a>, published in October 2025, is the first independent review of how UK energy suppliers are matching their customers\u2019 usage with renewable generation in each half-hour of the day.  <\/p>\n\n\n\n

It uses publicly available information from Ofgem, Elexon and the National Energy System Operator – with a methodology reviewed by experts from academia, energy suppliers and organisations – to provide some much needed transparency into renewable energy tariffs. <\/p>\n\n\n\n

The results revealed a huge difference between suppliers, with half-hourly matching scores ranging from 0% at the bottom to Good Energy\u2019s market-leading 88% for the April 2024 \u2013 March 2025 reporting period. This makes Good Energy the highest-ranked supplier for time-matched renewable electricity in the UK by quite some margin. <\/p>\n\n\n\n

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Leading suppliers now deliver clean energy when consumers actually need it \u2013 yet outdated rules leave their offers lost in a sea of identical but misleading \u2018green\u2019 claims. We built the Matched Clean Power Index to give consumers the clarity to find the cleanest electricity.\u201d <\/p>\nJoe\u202fKwiatkowski, Matched founder<\/cite><\/blockquote>\n\n\n\n

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See how your provider ranks<\/a><\/div>\n<\/div>\n\n\n\n

Why did Good Energy top the Matched Clean Index?<\/h2>\n\n\n\n

Good Energy directly purchases renewable power from over 3,000 independent British generators*. With our own in-house trading desk, we strive to create a fuel mix that matches how our customers are actually using electricity \u2013 by contracting directly with a wide variety of generators spread across the UK.  <\/p>\n\n\n\n

We believe this is the best way to help the UK grid to get to become 100% low carbon, as it helps to build a market for the variety of generation types needed to support this ambition at scale. Providing customers with information about when their energy use is being covered by renewable power also enables demand flexibility \u2013 reducing consumption or using storage technologies when the wind isn\u2019t blowing and the sun isn\u2019t shining.  <\/p>\n\n\n\n

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Good Energy\u2019s energy matching profile in February and March 2025. A strong base of anaerobic digestion (biogas) and hydropower is complemented by wind and solar.<\/em> <\/figcaption><\/figure>\n\n\n\n
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Another supplier\u2019s matching portfolio over the same time period, illustrating a significant shortfall between renewable generation and actual customer demand.<\/em> <\/figcaption><\/figure>\n\n\n\n

Frustrated by the previous lack of transparency in the market, we launched our own set of standards last year called Good Green Supply.   <\/p>\n\n\n\n

These standards look at three key areas:<\/p>\n\n\n\n