Green Mountain Power developed a solar power project and energy storage facility in Milton, Vermont. They hired RSG to conduct a sound-level assessment of the proposed project in preparation for state permitting under the Public Utility Commission’s Section 248 process, Vermont’s permitting process for public utility projects. The assessment included sound-propagation modeling to project future sound levels from the project’s inverters, transformers, and energy storage units, including the varying sound emissions from the project during the day, evening, and night when different sound sources would operate. The study included a sound-attenuating screen near the energy storage component. We found projected sound levels were within community noise guidelines.