OVO Energy is a UK-based energy retailer supplying gas and electricity to approximately 4 million customers.
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OVO Energy reports detailed operational emissions cuts and has ditched greenwashing REGOs, but 9.8Mt of annual Scope 3 from gas supply to 4 million customers overwhelms progress. Repeated regulatory fines for customer harm and billing failures, combined with intensity-based (not absolute) renewable targets, reveal a company still far from credible decarbonisation.
OVO Energy scores 42/100 (Below expectations) on SINK's independent climate assessment, scored from public data only. Fees pay for the review, never the result. Last verified May 2026.
That places OVO Energy joint 317th of 847 companies scored, and 5th of 20 in Energy Supply / Utilities.
Where OVO Energy sits among energy supply / utilities peers.
Among the 20 major energy supply / utilities brands we've scored, OVO Energy sits 5th of 20.
Its three lowest-scoring questions, and what the evidence didn't show.
No quantified waste targets, circular economy metrics, or landfill diversion rates reported.
OVO is an energy retailer with no generation assets or manufacturing.
However, Scope 3 target for sold electricity is intensity-based, not absolute.
A score changes when the evidence does. We use new published evidence at the next rescore. Evidence that isn't public can count through an evidence review.
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Get in touch →Strongest on Carbon Footprint — Operations and Carbon Footprint — Supply Chain (7/10, 6/10). Weakest on Resource Use & Waste and Water Impact (3/10, 3/10).
The 3 companies in the sector scoring nearest above OVO Energy.
VERBUND is 96% renewable-powered but emissions rose 4% in 2024 as gas generation recovered.
See the breakdown →Ecotricity supplies 100% green electricity but 99% fossil gas, masking its true emissions footprint.
See the breakdown →SSE publishes comprehensive GHG data with external assurance and holds SBTi-validated targets, but absolute emissions rose 10% in FY2024/25 due to increased thermal generation.
See the breakdown →The formula and all 17 sources.
Same ten questions for every company. No private weighting.
SINK = (0.3 × Base + 0.7 × Performance) × Scale17 sources used in this assessment. All publicly available. Each row shows which of the ten questions it informed.
11 of 17 sources are independent of the company.
If you believe a source has been misread or a newer version exists, submit a challenge.
OVO Energy is a UK-based energy retailer supplying gas and electricity to approximately 4 million customers. Founded in 2009 in Bristol, OVO operates as a public utility offering energy retail services. The company has positioned itself around climate commitments and nature initiatives but remains structurally tied to fossil gas supply.
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