Clay Center, Brookline MA

The system consists of an integrated solar and wind generating system that is designed foremost as an educational resource and secondarily as a source of non-polluting, renewable energy for the Dexter and Southfield campus. The system is mounted on the 5th floor roof deck the Clay Center, behind the observatory. This location provides good solar and wind exposure, accessibility to Dexter students, faculty, and guests for educational and demonstration purposes, and does not impinge on the architectural integrity of the Dexter-Southfield campus.

A 1000-watt Bergey XL.1 wind turbine is mounted on a 20-foot lattice tower at the north end of the Clay Science Center north deck. This turbine is currently connected to a 24-volt battery bank and a separate stand-alone 1000-watt inverter to transform its DC output to standard 120-volt AC current. The solar array consists of eighteen rack-mounted photovoltaic modules made by ASE Americas of Billerica, MA. The ASE 300 module is the largest and most powerful individual solar electric panel made in the world. These modules form a 5.4 kilowatt (kW) solar electric array.

 Click here to see a live image of the solar arrays and wind turbine on the north deck of the Clay Center. The camera is mounted inside the Level 5 multipurpose room and faces northeast. Kenmore Square and the Boston skyline are in the background. The camera is refreshed every 10 seconds.

The solar and wind energy system was designed and installed by
Solar Works, Inc. of Vermont. The president of Solar Works is a graduate of Dexter School. Data monitoring is provided by Heliotronics, of Hingham, Massachusetts, a leader in the design and development of educational electronics and software for the photovoltaic industry.

The Clay Center is pleased to be one of Heliotronics' case study sites. In addition, data from the Clay Centers weather station allows students to correlate system performance with the available wind and solar resource and ambient weather conditions. The graph above shows a typical sunny day in March, 2003.