Vehicle-to-grid (V2G) is now commercially live in the UK, Versinetic review says
Versinetic's 2026 review names Octopus Energy's Power Pack as the one mainstream live V2G tariff in the UK and lists 27 V2G-capable cars, including the Volkswagen ID.Buzz and Kia PV5. It estimates that the UK's 2.28 million battery-electric cars hold a theoretical 114 GWh of storage, only a fraction of which could be offered through V2G today.
Smart EV charging consultancy Versinetic, whose products include load balancing and ISO 15118 charging, has concluded that commercial vehicle-to-grid is live in 2026 in only a handful of markets: the UK, Germany, France and Australia. Its insight article, 'Vehicle-to-Grid is Here, Finally: Where V2G Stands in 2026', is dated 9 October 2026. It says most other countries, including Norway, remain at pilot stage, and describes the Netherlands as rolling out V2G city by city.
EV Fleet World, which reported the analysis on 22 October, says it was written by Versinetic EV analyst Julian Skidmore and covers the UK, Australia, Germany, France, the Netherlands, Norway, the US and Japan.
The UK position
Versinetic says the UK completed streamlining G99 approval for V2G in 2025. It describes Octopus Energy's Power Pack as, to date, the one mainstream, live commercial V2G tariff in the UK, and says UK Power Networks now offers automatic V2G connection approval, which it calls a UK first. It also reports that Nissan was the first car company to gain G99 grid-code certification for an AC-based V2G solution, after a year-long trial at the University of Nottingham. That approach uses the car's on-board charger rather than a separate bidirectional unit.
The review lists 27 V2G-capable cars available in the UK, which it presents as '27 of the best', drawing on EV Database UK. The brands in the table are Renault, Volkswagen, Mercedes-Benz, Kia, Volvo, Alpine, Skoda, Audi, BMW, Hyundai and Polestar. The Volkswagen ID.Buzz and Kia PV5 are among the listed models.
Theoretical storage
Versinetic puts the UK's battery-electric car fleet at 2.28 million by the end of September 2026, about 7.15% of UK cars. At an average 50 kWh each, it calculates a theoretical 114 GWh of storage. Adding that to the roughly 7.5 GW (137 GWh) of static battery storage it says the UK had as of mid-2026 gives a theoretical combined pool of about 251 GWh, nearly double static storage alone. The two figures measure different things: 137 GWh is installed grid-connected capacity, while the EV figure is the theoretical total capacity of the car fleet. Only a fraction of it could be made available through V2G today, and actual V2G capacity depends on vehicle compatibility, driver participation and export infrastructure.
In a hypothetical case where every UK car was electric, Versinetic calculates that their batteries could supply roughly 48 hours of current UK electricity use with no other energy source available. It expects V2G on battery-electric cars to provide around half of the UK's potential storage for the rest of the decade, and estimates that Britons invest around £20bn a year in EVs.
The review also models a neighbourhood of 300 homes with 1.5 EVs each, every vehicle needing about 5.3 kWh over an eight-hour night. That charging would draw about 296 kW, close to a typical local substation's 300 kW capacity. With sufficient renewable energy, Versinetic says V2G would let charging spread across 24 hours and cut average power to about 100 kW.
"We have spent years asking how the electricity system will cope with millions of electric cars. V2G means those same cars could become part of how we manage that challenge," said Dunstan Power, Versinetic's managing director, in comments carried by EV Fleet World. "The challenge now is to turn that potential into practical services that work for drivers, energy suppliers and network operators."
Ahead of the Autumn Budget, Versinetic says policymakers should consider how charging infrastructure, interoperability standards and energy-market arrangements can support commercial V2G.
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