Vehicle-to-grid systems offer promise but require significant infrastructure changes and addressing battery concerns.
The potential for electric vehicles (EVs) to send electricity back into Singapore’s power grid was discussed at the Singapore International Energy Week on October 24, 2024. This concept, known as vehicle-to-grid (V2G) technology, could offer solutions for energy management, especially during peak demand or supply disruptions.
Experts highlighted successful trials abroad, such as a test in Australia where 16 EVs sent power back to the grid within a minute of a power station failure. Dr. Dhivya Sampath Kumar from the Singapore Institute of Technology explained that EVs could help by charging during off-peak hours and discharging during peak periods, aiding grid stability.
However, the system faces significant challenges in Singapore. For instance, all 13,800 EV charging points in the country would need to be upgraded to support bidirectional charging, allowing energy to flow both to and from the vehicles. Furthermore, the batteries in EVs would need to be adapted for this use, which could require new technology.
Panelists also discussed the concern of battery lifespan, as discharging and charging could reduce battery life. One potential solution raised was battery leasing, where EV owners could lease batteries that are guaranteed to last longer, alleviating concerns about maintenance.
Despite these hurdles, the panel agreed that V2G technology could play a role in supporting Singapore’s renewable energy goals, including its target of deploying 2 gigawatt-peak of solar energy by 2030. However, a new market structure would be necessary to compensate EV owners for their energy contributions, potentially providing credits or direct payments for discharged energy.
