Utility Companies Plan to Use V2G Technology to Ease Peak Power Demand
Two utility companies in Massachusetts are planning an innovative program to purchase electricity from electric vehicle (EV) owners equipped with Vehicle-to-Grid (V2G) technology through a virtual power plant (VPP) mechanism. The initiative aims to address surging summer electricity demand by buying stored power from EV batteries during peak hours, with a maximum purchase price of $275 per kilowatt-hour (approximately NT$8,800).
The program seeks to utilize EV batteries as distributed energy storage units, providing additional power during periods of high demand and reducing reliance on traditional fossil fuel-based generation. Utility companies state that the smart grid will prioritize dispatching electricity from EV batteries, activating other power sources only when supply is insufficient. EV owners can charge their vehicles during low-cost, solar-powered daytime hours and sell electricity back to the grid during peak evening demand, earning compensation in the process.
Purchase Prices Highly Volatile, Actual Earnings for EV Owners Uncertain
While the utility companies have announced a maximum purchase price of $275 per kWh, this rate applies only during extreme peak demand periods and is subject to real-time supply and demand conditions. Under the most optimistic scenario, EV owners could earn between $1,375 and $2,750 (approximately NT$44,000 to NT$88,000) per month in additional income. However, experts note that since the average residential electricity price is less than $0.50 per kWh, utility companies are unlikely to sustain such high purchase prices over the long term, meaning actual earnings may fall well below the maximum advertised rate.
Additionally, purchase prices will fluctuate based on market conditions, leaving uncertainty over whether EV owners can consistently secure high returns. The utility companies have yet to disclose specific details about the purchase mechanism, including how prices will be calculated, payment frequency, and settlement methods, all of which require further clarification.
V2G Compatibility Poses Participation Barrier
Currently, eligible EV models for the program include the Ford F-150 Lightning, Nissan Leaf, Kia EV9, and Volvo EX90, all of which must support V2G bidirectional charging. However, Massachusetts has approximately 150,000 EVs on the road, with the majority being Tesla models. Since most Tesla vehicles do not yet support V2G technology, fewer than one-third of EVs in the state may qualify for participation.
Beyond vehicle compatibility limitations, some EV owners have already installed rooftop solar panels and home energy storage systems, which may prioritize powering their own households, further reducing the amount of electricity available to sell back to the grid. Experts suggest that using EVs as distributed energy storage units is more cost-effective than deploying large-scale battery storage systems, particularly in regions with high EV adoption. Nevertheless, the program’s success will depend on multiple factors, including the financial viability for utility companies, EV owner participation, and technological compatibility.
The utility companies in Massachusetts have not yet announced an official launch date for the program or clarified whether regulatory approval or legal permits will be required. Due to the lack of a clear implementation timeline and supporting measures, EV owner willingness to participate remains uncertain. If the program proceeds as planned, it could provide a new revenue stream for EV owners while enhancing grid stability.
