EVs as Mobile Batteries: Massachusetts Rolls Out V2G Program to Ease Peak Demand
Two utility companies in Massachusetts are set to launch an innovative program that will allow electric vehicle (EV) owners to sell power stored in their vehicles back to the grid during peak demand periods. The highest purchase price could reach $275 per MWh (approximately $8,800 in TWD). This Vehicle-to-Grid (V2G) technology transforms EVs into distributed energy storage systems, helping to stabilize the grid during summer peak demand.
The utility companies plan to allow participating EV owners to charge their vehicles during the day when solar power generation is abundant and electricity prices are lower. After sunset, the grid will prioritize purchasing power from these EVs to meet community demand, reducing reliance on traditional fossil fuel-based generation. Currently, four vehicle models have been confirmed to support the program: the Ford F-150 Lightning, Nissan Leaf, Kia EV9, and Volvo EX90.
High Earnings Potential, But Actual Returns Remain Uncertain
The utility companies state that the purchase price will vary based on battery capacity and participation levels, with a maximum of $275 per MWh. Under optimistic projections, EV owners could earn between $1,375 and $2,750 per month (approximately $44,000 to $88,000 in TWD) in additional income. However, experts note that this purchase price will only apply during periods of extreme supply-demand tension, with prices likely to be much lower at other times.
There are currently around 150,000 EVs on the roads in Massachusetts, but not all models support V2G functionality. Analysis suggests that due to the lack of bidirectional charging capability in most Tesla models, which dominate the market, fewer than one-third of the state’s EVs may qualify for the program. Additionally, some EV owners have already installed residential solar systems, using their vehicles to store daytime-generated power for nighttime personal use, further limiting the amount of power available for resale.
Utility Cost Considerations May Impact Long-Term Purchase Prices
Experts warn that the high purchase prices offered by utility companies may be an initial strategy to attract EV owners and may not be sustainable in the long term. For example, the average residential electricity rate in Massachusetts is less than $0.50 per kWh (approximately $16 in TWD), while the V2G program’s highest purchase price reaches $275 per MWh—equivalent to $0.275 per kWh. The stark difference underscores the grid’s urgent need for power during peak periods.
The utility companies have not yet announced an official launch date for the program or provided detailed information on the participation process and technical requirements. As the summer peak demand season approaches, it remains to be seen whether the program will effectively balance grid load and deliver tangible earnings for EV owners. Experts advise interested owners to closely monitor future announcements from the utility companies and assess whether their vehicles meet the technical criteria.
