The average household energy bill will hit £1,971 in October, up £63 from July. In that context, every tariff decision matters. Which? has just published a deep-dive review of Fuse Energy, a supplier that launched in 2022 and now claims over 100,000 customers.
As reported by Which?, Fuse Energy positions itself as a digital-first, low-cost provider with a green edge. But for homeowners planning solar panels, heat pumps, or insulation upgrades, the choice of supplier is not just about price per kWh.
Who qualifies, and who doesn’t
Fuse Energy offers fixed and variable tariffs via its app. The Which? review highlights that its customer service scores are above average for new entrants, but still below the Big Six on phone support. For a household running a heat pump, which typically uses 4,000–6,000 kWh more electricity per year than gas heating, a tariff’s standing charge and unit rate matter more than the headline discount.
The catch is that Fuse Energy’s green credentials are not certified by Ofgem’s Green Gas Certification Scheme or similar bodies. The supplier says it offsets carbon, but does not buy certified renewable electricity. For homeowners aiming for a higher EPC rating through low-carbon heating, that nuance can affect your overall sustainability story.
What it costs a typical 3-bed semi
A typical 3-bed semi using 12,000 kWh of gas and 2,900 kWh of electricity paid about £1,971 on the price cap from July. Fuse Energy’s cheapest fixed tariff in September was 5% below the cap, saving roughly £98 a year. But that fixed deal locks you in until October 2025, with exit fees of £50 per fuel.
If you plan to install a heat pump in 2025, which could cut gas use by 80% but increase electricity demand by 3,000 kWh, that exit fee becomes a real cost. The Energy Saving Trust estimates a heat pump can save £200–£600 a year on heating, but only if your tariff is optimised for electric heating. A gas-heavy fixed deal from Fuse may not be the best match.
What this means for your EPC plans
EPC ratings depend on heating system efficiency, not just supplier choice. But switching to a green tariff with certified renewable electricity can improve your environmental score in some EPC assessor calculations. Ofgem’s latest data shows only 12% of households are on a green tariff that meets the certification standard.
If you’re planning to upgrade your EPC from D to C, which can add £1,500–£3,000 to your home’s value, the supplier you choose is a small but visible part of the story. Fuse Energy’s carbon offset model is better than nothing, but it does not meet the Gold Standard that some buyers and lenders now ask for.
Should you switch, or wait
For households not planning any eco-upgrades in the next 12 months, Fuse Energy’s fixed tariff is a reasonable option. The Which? review confirms its app is easy to use and bills are accurate. But for anyone with a heat pump or solar installation on the horizon, the exit fees and lack of certified green electricity are real drawbacks.
Ofgem’s price cap will be reviewed again in February 2025. If you can wait until then, you may find better deals from suppliers with certified green tariffs and no exit fees. In the meantime, check your current tariff’s end date and exit fees before moving. The £98 saving from Fuse could vanish if you need to leave early for a heat pump install.
Frequently Asked Questions
Yes, its cheapest fixed tariff in September 2024 was about 5% below the price cap, saving a typical household roughly £98 a year. But exit fees of £50 per fuel apply if you leave early.
Probably not. The fixed deal locks you in until October 2025, and the tariff is designed for gas-heavy homes. A heat pump increases electricity use significantly, so you need a tariff with low unit rates for electricity, not gas. Check exit fees and compare green tariffs before switching.
