Minneapolis Sustainability

350 S. 5th Street, Room 315M
Minneapolis, MN 55415
sustainability@minneapolismn.gov

Royalston Maintenance Facility

661 5th Ave. N.

445 photovoltaic cells

103.6 kilowatts (kW)

Cost: $378,000 (including upgrade)
Annual Savings: $14,200

Completed: January 2006
Upgraded: February 2012

The 70,000 square feet Royalston Maintenance Facility was built to consolidate several shops scattered throughout the city. With 31 repair bays and 125 vehicle lifts, the combined shop services the City’s police and light-fleet vehicles. The facility is also home to a paint shop, plumbing shop, carpentry shop, electrical shop, bricklayers shop, ramp maintenance, custodial services, and administrative offices. Natural day lighting throughout the facility add to a pleasant work environment while reducing electrical use.

Royalston’s photovoltaic system is in the marshalling yard of the maintenance facility. It faces due south, with an unobstructed view of the southerly sky. The system originally consisted of 16 165-watt photovoltaic cells designed to generate approximately 2.6 kW of electrical power. The array is mounted on a mast arm that automatically adjusts to the sun in the morning and tracks its path throughout the day. This system was furnished and installed for a cost of $35,000. It was completed in January 2006.

In March 2012, a substantial upgrade was completed at the Royalston facility, adding another 429 solar PV panels capable of generating 101 kW of electricity. Engineering, construction, and labor costs totalled $343,000, with an expected annual savings of $14,200 altogether. This clean, renewable energy project also helps the city avoid 75 metric tons of carbon dioxide from being emitted annually into the atmosphere through conventional power generation methods.

Last updated Feb. 24, 2012