Legislators update solar installation laws to include 25 kilowatt systems and zoning rules

A significant update to Vermont's solar energy regulations was discussed during the House Energy and Digital Infrastructure meeting on March 18, 2025. Lawmakers are pushing to increase the maximum size of residential photovoltaic systems from 15 kilowatts to 25 kilowatts, reflecting advancements in solar technology that allow for more energy generation in the same physical space.

The proposed change aims to encourage more homeowners to adopt solar energy by making it easier to install larger systems that can meet their energy needs. The 25-kilowatt limit was chosen based on improvements in energy density since the original law was established in 2014. This update is expected to enhance the accessibility of solar power for Vermonters, allowing them to harness more energy without requiring significantly more space.

During the meeting, a friendly amendment was passed, ensuring that the new regulation explicitly includes the 25-kilowatt limit and not just a maximum of that size. Additionally, the amendment mandates that these smaller systems adhere to local zoning setbacks, promoting good relationships between solar system owners and their neighbors.

Another key point discussed was the need for flexibility in the registration process for these systems. Currently, if a developer makes an error in assigning renewable energy credits, they cannot change it, which can lead to financial losses. The new proposal would allow for a one-time reassignment of credits, providing a safety net for developers who make mistakes.

This legislative move is seen as a step forward in Vermont's commitment to renewable energy, aiming to simplify the process for homeowners while ensuring compliance with local regulations. As the state continues to embrace solar energy, these changes could significantly impact the growth of residential solar installations in Vermont.