The UK government is reviewing proposals to provide financial incentives to automotive manufacturers that incorporate vehicle-to-grid (V2G) technology into electric vehicles, according to plans under consideration as part of a review of the zero-emission vehicle mandate.
V2G technology enables vehicle owners to charge their cars automatically when electricity prices are low during nighttime hours and subsequently return stored power to the electrical grid during periods of high demand. The same technology can also supply power directly to households through vehicle-to-home (V2H) functionality. Proponents argue that widespread adoption of these capabilities could address a significant challenge in the energy transition: maintaining grid stability during periods when renewable generation from wind and solar sources falls below electricity demand, such as during calm, overcast, or nighttime conditions.
Under the proposal framework, manufacturers would receive credits for installing bidirectional charging systems, which could potentially allow them to sell additional petrol-powered vehicles without incurring penalties under zero-emission vehicle targets. However, industry observers and advocacy groups have raised concerns about this approach. The National Energy System Operator estimates that V2G technology could theoretically provide approximately 1.2 gigawatts of power capacity by 2030, potentially increasing to 41 gigawatts by 2050.
Critics argue that the incentive structure may not effectively drive adoption of the technology among consumers. Representatives from environmental organizations and driver advocacy groups contend that rewards should be contingent on actual usage rather than mere installation, noting that the infrastructure costs for drivers remain prohibitively high relative to the manufacturer credit values being proposed. Several European companies, including Octopus Energy in the UK, already offer services allowing drivers to sell electricity back to networks, with potential savings claimed at around £620 annually per vehicle.
The government consultation on these proposals closed earlier this week, with officials simultaneously preparing to reduce electric vehicle sales targets within the zero-emission vehicle mandate, a move environmental groups estimate could result in additional carbon emissions of approximately 147 million tonnes through 2050.
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