What the funding will test
Ofgem’s Strategic Innovation Fund is backing a trial called Roaming MPANs, led by Scottish and Southern Electricity Networks. The idea is simple: let EV drivers tap their usual domestic tariff, including any cheap overnight rate, when they plug in at public points. At the moment domestic electricity carries 5% VAT while public charging is hit with 20%, so the gap can be large for anyone who cannot charge at home.
Who stands to gain
The change would mainly help people in flats, rented homes or streets without on-street chargers. They currently pay more and miss out on off-peak deals that many dual-rate tariffs already offer. The project also hopes to shift more charging to quieter hours, easing pressure on the grid.
Frank Clifton, SSEN Distribution’s Innovation Manager, said: "Sales of EVs rose by more than 44% in July 2026, compared with the same month last year, so it’s incumbent on network operators like us to respond to this consumer trend, by doing what we can to help make the charging and running of these cars cheaper, and more straightforward."
What you can do right now
While the roaming system is still in development, switching to a dual-rate domestic tariff can already cut costs if you charge overnight. Check your meter’s MPAN and settlement configuration first; many suppliers, including Fuse Energy, will upgrade a non-smart meter for free so you can track usage properly. Compare the off-peak rate, the peak rate you will still pay for daytime use, the standing charge and any exit fees before you move.
Next steps for drivers
Keep an eye on the Roaming MPANs trial results. When it rolls out, the biggest winners will be those who currently rely on public chargers and pay the higher VAT rate. In the meantime, sorting your home tariff is the quickest way to start saving on every kWh you put into the car.
