How Electric Vehicles Could Solve UK's Fuel Reserve Concerns
The ongoing conflict in Iran has driven petrol and diesel prices to multi-year highs, prompting warnings of potential fuel rationing across Europe and renewed calls for expanded North Sea oil and gas drilling. However, a compelling analysis indicates that Britain may be overlooking a crucial solution already present on its driveways and streets: the widespread adoption of electric vehicles.
Extending Fuel Reserves Through Electrification
According to official data examined by the policy consultancy Mandala Partners, the UK maintained approximately three weeks' worth of car fuel reserves before the conflict—specifically 21 days of petrol and 22 days of diesel. The research suggests that if Britain achieved Norway's level of electric vehicle penetration, where nearly 32% of all cars are fully electric compared to just 5.4% in the UK, an additional seven days of petrol reserves could be secured.
Even with current adoption rates, Britain's existing electric and hybrid vehicles are estimated to be saving about two days' worth of fuel. This figure highlights the significant opportunity at a time when Shell's chief executive, Wael Sawan, warned that Europe could face fuel shortages as early as April if the Strait of Hormuz—a critical shipping lane in the Gulf—remains closed.
Norway's EV Success Story
The disparity between Norway and the UK is particularly striking given that Norway presents more formidable challenges for electric vehicle drivers. As Europe's longest country with freezing winters that can deplete battery life, Norway has nonetheless overcome range anxiety through a dense, state-supported and commercial charging network. Researchers argue that Britain has fewer excuses for lagging behind in electrification efforts.
"Those arguing on energy security grounds for new exploration and to cut taxes on domestic oil and gas production, ought also to advocate for electrification," Mandala Partners emphasized in their analysis.
Vehicle-to-Grid: The Virtual Power Plant
Beyond simply replacing petrol consumption, Britain's electric car fleet could serve as an active buffer against future energy shocks by storing and redistributing energy. The RAC Foundation estimates that most electric vehicles sit idle for 95% of the time, essentially functioning as mobile batteries when plugged in and not in use.
With appropriate charging infrastructure and vehicle inverters, this stored energy could flow back into the power grid during periods of high demand or supply shortages. This technology, known as vehicle-to-grid, effectively transforms electric cars into virtual power plants, according to Alex Schoch, Octopus Energy's director of electrification.
"An electric car typically holds about 40 kilowatt hours of power, sufficient for an average UK home for several days," Schoch explained. "It enables EVs not just to charge from the grid but to send energy back, powering homes, balancing the grid, or even supporting your neighbour's kettle."
Financial Incentives and Current Barriers
During an energy supply crisis, this distributed electricity storage could make a substantial difference by allowing the grid to draw power from millions of car batteries rather than relying on gas-fired power stations. For drivers, the motivation includes potential financial benefits: Octopus Energy claims customers on its primary vehicle-to-grid tariff save approximately £620 annually on charging costs by selling energy back to the grid during peak demand and purchasing it cheaply overnight.
Despite these advantages, adoption remains limited. Schoch noted that fewer than 100 people currently use two-way charging on that tariff, although over 10,000 have expressed interest. Two significant barriers hinder wider implementation:
- Tax Policy: EV owners face taxation on electricity when charging their car batteries and must pay the same tax again when refilling after selling energy back to the grid. While Germany and the Netherlands have enacted laws to prevent this double taxation, Britain has not yet followed suit. Schoch identified this as "the single biggest thing" impeding the technology's progress.
- Hardware Availability: Although many electric vehicles—including Volkswagen's ID range, the Nissan Leaf, and Chinese BYD models—are already capable of two-way charging, other manufacturers have not widely activated this feature. Schoch anticipates this will change within three to four years as demand increases.
Future Potential and Current Challenges
The energy regulator Ofgem has projected that if half of the expected 11 million electric vehicles on UK roads by 2030 were equipped for two-way charging, they could supply 16 gigawatts of power back to the grid daily—nearly half the output of Britain's gas-power station fleet. Schoch described EVs as "a resilient, distributed virtual battery that could be a core part of absorbing price shocks."
However, the transition to electric vehicles faces obstacles. Battery electric cars' share of sales declined by 1 percentage point in February compared to the previous year, reflecting a broader industry slowdown. Major manufacturers like Ford, Volkswagen, and Stellantis have written down tens of billions of pounds in EV investments in favor of more profitable combustion engines amid slumping sales.
Ian Plummer, chief customer officer at the listings site Autotrader, observed that while the Iran conflict has sparked renewed interest in electric vehicles, previous surges—such as during the 2022 energy crisis—have not led to sustained increases in electric purchases. Additionally, the UK's zero-emission vehicle mandate, which requires all new car sales to be electric by 2035, faces pressure from industry lobbying, casting uncertainty over the pace of electrification rollout despite its strengthened case.
