Rooftop Solar PV CASE STUDY VELOSOLAR.COM Installment Time System Size ROI Payback Period Energy Savings 74 kW 1 year 20 % Choate Construction Company PROJECT GOALS Choate Construction Company headquarters, with some 150,000 square feet of office space spread through six stories, required about $56,000 per month in energy costs to operate. That’s a significant expense. But the 25,000 square foot roof was ideal for solar installation. The roof easily accommodated a 74 kW solar array comprising more than 16,000 solar cylinders. Now, the company saves $11,000 per year on its power bill. Choate was also equipped with our patented PowerEnfo smart grid software to measure energy use in real–time, aggregate energy data to identify trends, avert unseen performance problems, and verify the fo

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