The board discussed a draft bylaw for battery energy storage systems, with Richard Harris, a board consultant, presenting a synthesis of the state’s model bylaw and feedback from previous meetings. The draft aimed to streamline regulations by condensing the document from 20 to 18 pages, focusing on essential elements and placing administrative requirements in policies rather than the zoning bylaw. This approach would allow the board to adapt more easily to technological changes. Harris explained that the draft proposed categorizing battery storage systems into three tiers, detailing what each tier would allow in various districts. The tier system aimed to differentiate between the scale of operations, with tier one encompassing smaller systems, potentially for household use, and tier three for larger installations. The board debated the implications of classifying tier two uses as permitted by right instead of needing a special permit, weighing the perception of regulatory rigidity against practical considerations for site plan reviews.

The discussion also touched on the community benefits plan associated with storage systems. The proposal to prohibit battery storage systems within water supply protection overlay districts was contentious, with concerns about potential state attorney general rejection. This led to a broader conversation about operational standards, setbacks, and the practicalities of enforcing such regulations, particularly the proposed 150-foot setback from wells and septic systems, which some participants feared might render tier one systems infeasible for residential lots.

Noise regulations were another focal point, with debates over the proposed limit of 60 decibels. Participants noted that this could be higher than ambient noise levels in rural areas and discussed the challenges of enforcing such standards without proper equipment or personnel. Suggestions were made to adopt a more subjective noise interference standard, which might be easier to enforce. The conversation highlighted the potential noise impact from large battery systems and the need for further evaluation, especially in residential areas.

The meeting also covered the complexities of managing energy storage systems, including fire safety, runoff concerns, and the implications of the tiered regulatory framework. Participants questioned the adequacy of buffers and screening for battery storage units, which are often housed in trailers or shipping containers.

Signage requirements were reviewed, focusing on the timeline for updating contact information. The board considered a 60-day window for changes, with varying opinions on its feasibility. Noise pollution concerns were reiterated, emphasizing the difficulty in measuring baseline levels before development begins and the potential disturbances reported from similar projects in nearby areas.

Decommissioning and abandonment processes were another significant topic. The board examined the financial responsibilities of landowners, particularly the adequacy of the proposed decommissioning fund set at 125% for the first ten years. Questions arose about penalties for site abandonment and the impact on agricultural land designated under Chapter 61A, should it be repurposed for energy storage. The board emphasized the need for clear guidelines on acceptable restoration practices, considering the removal of structures and underground installations.

Fee structures for permits and applications were debated, with concerns about balancing basic fees with actual review costs. The board acknowledged the lack of a complete fee schedule and discussed the necessity of public hearings for any changes. The conversation also touched on the absence of wind power regulations, highlighting challenges in regulating new technologies.