Central Storage & Warehouse

Rooftop | 741 kW

Central Storage & Warehouse (CSW), a large refrigerated and freezer warehouse facility, partnered with SunPeak to install the largest rooftop photovoltaic (PV) solar system in Wisconsin history. Central Storage & Warehouse projects $5.1 million in energy savings over 30 years. The family-owned business is excited they are now powering a good portion of their refrigeration needs with natural sunlight.

“Central Storage & Warehouse is proud to have partnered with SunPeak to make this solar project a reality. We are excited by the opportunity to both improve our operating efficiency and reduce our environmental impact, consistent with our commitment to our customers and community.”

Winegarden photo

John Winegarden
CEO Central Storage & Warehouse


Reduced Electricity Costs

With a former utility blended cost of electricity of 10.2¢ / kWh, this system reduces their levelized cost of energy over the life of the system to about 3.2¢ / kWh, which will produce over $90,000 of direct energy cost savings per year. As the cost of electricity increases over time due to inflation, these energy savings will grow over time.

In addition to the federal tax credit and accelerated depreciation benefits, this particular project was able to take advantage of a one-time cash grant. SunPeak was able to arrange financing for this system that allowed CSW to install the system on a cash flow neutral basis and then finance it over time to provide ongoing positive cash flow throughout the entire life of the system.

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Project Highlights

Madison, WI

April, 2016

741 kWdc / 660 kWac

Production Estimate
905,500 kWh / year (16% offset)

2,904 x 255W polycrystalline

DeltaWing & Flush Mount

22 x 30kW/each