Where does our electricity come from?
Read on to find out where our electricity came from between 1 April 2024 and 31 March 2025.
Going greener
At OVO, we’re helping customers save money and cut carbon. We want the future of energy to be cleaner, greener, and more affordable – for everyone in the UK. So it’s great news that on average, 42% of the power flowing into homes came from greener sources – like wind, solar, and hydro. With our customers, we’re investing in new renewable power from community projects to help this trend continue.
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So-called“renewable tariffs”
Some energy suppliers claim to sell energy that is “100% renewable.” To be able to say that, many of them buy certificates called REGOs (Renewable Energy Guarantees of Origin). But these certificates don’t tell the whole story.
Our research shows that REGOs don’t actually make the UK electricity grid any greener. That’s because the way they work is by matching up renewable power that is already being generated with the power someone on a “100% renewable” tariff uses in their home. You might think by signing up to that tariff you’re supporting new renewable power – but you’re not. These tariffs alone don’t generate any more green energy or give you 100% green energy at home, they just apportion what’s already there to specific people. Helping those suppliers to look better on paper.
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Reporting on our fuel mix
The energy regulator, Ofgem, requires all energy suppliers to report on their “fuel mix”. At the moment, this fuel mix disclosure still allows suppliers to appear ‘greener’ by purchasing certificates like REGOs. That’s something we’re campaigning to change, so everyone is playing fair. Until then, we’re leading by example by adopting a location-based approach for our carbon footprint, meaning that electricity sold to customers reflects the grid’s average intensity. This means our focus is on growing how green the grid is for everyone - rather than claiming existing renewable power.
We will continue to report our fuel mix annually as required. Our fuel mix might appear less favourable than others on paper, but the energy going into our customers’ homes is exactly the same as whether they were with OVO or someone else. For the period April 2024 to March 2025, our fuel mix was as follows: Natural Gas 73%, Coal 15%, Renewables 2%, Nuclear 4%, Other 6%. The carbon intensity was 474g per kWh, and the radioactive waste was 0.0003g per kWh.
Greener Electricity: helping the UK run ongreener power
For customers who really want to help our country run on more greener power, we offer our Greener Electricity upgrade.