Two equally sized 2.5 kW photovoltaic arrays provide electricity to this energy-efficient classroom building and the nearby Critter House. Forty First Solar 62.5-Watt Cadmium-Telluride modules are rack mounted on the left (west end) and twenty Uni-solar 128-Watt amorphous silicon laminate modules are adhered directly to the standing seam roof on the right (east end). Each array feeds its own SMA SWR2500U (Sunny Boy 2500 Watt) grid-tied inverter. The Uni-solar array was installed in 2000, and the array of First Solar modules was installed in 2008. The photovoltaic systems were generously funded by First Solar and United Solar. Excess electricity produced is used by the neighboring Critter House building. Two solar thermal panels provide domestic hot water, and south-facing glass and mass walls capture passive solar energy for space heat. Note: Throughout this site, on graphs we are displaying energy produced as positive, and energy consumed as negative.

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