Scaling Solar+ for Small and Medium Commercial Buildings

This project focused on developing and validating technology that can lead to market scaling for resilient Solar+ microgrids (systems combining solar, batteries, or other equipment) at small commercial buildings. The research project deployed a Solar+ microgrid at a fueling station and convenience store operated by the Blue Lake Rancheria Tribe in Northern California near the cities of Arcata and Eureka in Humboldt County. The pilot system included a 50-kW photovoltaic array, a 109-kW/174-kWh lithium-ion battery, interconnection switchgear with microgrid automation controls, and advanced building controls on the heating, ventilating, air conditioning, and refrigeration systems. The project work resulted in advances toward a standardized switchgear and controls setup for microgrids, improved open-source software for automation and integration of distributed energy resources and loads, and market scaling insights that support continued work toward commercially viable and widespread application of the technology. Demonstrated benefits include electricity bill savings, reduced greenhouse gas emissions and increased renewable-based resilience for the host site, as well as the ability to provide a response that is appropriate for grid services. Additional investment in the deployment of Solar+ microgrids could be targeted for critical community facilities that serve roles in disaster response, with a focus on wildfire-prone and disadvantaged communities. These investments can provide immediate and valuable assistance to communities and would have spillover benefits in technology learning and cost reductions for Solar+ microgrids that serve small to medium commercial buildings.