Green Mountain Power expands battery storage program to 4500 customers in Vermont

The Vermont House Energy and Digital Infrastructure meeting on March 28, 2025, highlighted significant advancements in the state's energy storage initiatives, particularly through battery storage programs. The discussions revealed that Green Mountain Power (GMP) has successfully deployed battery storage systems to approximately 4,500 customers, contributing around 70 megawatts of power capacity. This capacity is notable as it represents the largest generation resource in Vermont, underscoring the state's commitment to enhancing energy resilience and sustainability.

GMP's energy storage portfolio includes a residential program known as Engine Storage Service (ESS), which allows customers to lease battery systems for a monthly fee. This program not only provides backup power for homes but also helps reduce overall electricity costs during peak demand periods. By tapping into stored energy during high-demand times, GMP can lower the need for electricity from the regional grid, benefiting all customers and reducing carbon emissions.

Additionally, the meeting discussed the role of battery storage in participating in frequency regulation services within the ISO New England market. This participation allows battery systems to provide quick adjustments in energy output, generating revenue that can be returned to customers through lower rates.

Overall, the meeting emphasized the importance of battery storage in Vermont's energy strategy, showcasing how these initiatives not only support individual customers but also contribute to broader energy efficiency and sustainability goals for the state. As Vermont continues to innovate in energy storage, the implications for cost savings and environmental impact are expected to be significant.