System details:
- 14 solar modules (panels) -- Suniva Optimus 255 (Atlanta, GA company, “Buy America” compliant)
- 255 watts max per module
- Enphase M215 microinverters (215-watt guaranteed output, 225-W actual output)
- System capacity = 14 x 225 W = 3150 W = 3.15 kW
Grid-tie details:
- Module DC output is inverted to 208-V AC at each panel. The 208-V three-phase power is fed into the Ben Franklin mechanic room, where a dedicated transformer converts it to 480-V three-phase and ties it to the campus grid. Generated power is tallied by an Enphase Envoy Communications Gateway, which transmits the data to a California server via an Ethernet connection.
Solar Renewable Energy Credits (SRECs):
- The BU solar array is registered with the Pennsylvania Alternative Energy Portfolio Standard Program (PA-AEPS), enabling us to participate in the PA Alternative Energy Credit Program, which is the Pennsylvania equivalent to the federal SREC program. Each 1000 kWh of generated energy equates to one credit, which can be sold through the Generation Attribute Tracking System (GATS). PJM, the principal power-grid operator in the mid-Atlantic states, runs the GATS market.
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