Stimulus success story

The Chelmsford (Mass.) Water District serves 26,000 customers on a $5.3 million annual budget. Managers expect 2,300 photovoltaic panels to supply more than half the energy their 3-mgd treatment plant needs every year. Photos: MassDEP, Division of Municipal Services

Connector boxes collect the DC current from groups of panels and send it to the inverter box to be converted to AC power.


The inverter converts the solar DC power to AC power that is routed back to the grid.

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