DLR Group: Mandalay Bay Solar Array

Addition of on-site renewable solar system of a resort


Figure 1: The 11 acre solar array at the Mandalay Bay Resort Conference and Convention Center is the second largest rooftop solar array in the world. It consists of 21,325 modules that produce more than 6.4 MWp and is configured to provide 20 percent of the facility’s power demand. Courtesy: DLR GroupEngineering firm: DLR Group
2015 MEP Giants rank: 34
Project: Mandalay Bay Solar Array
Address: Las Vegas, United States
Building type: Hotel/motel/resort
Project type: Addition of on-site renewable solar system
Engineering services: Electrical, power; Energy, sustainability
Project timeline: 4/1/2014 to 1/15/2015
MEP/FP budget: Classified


Reducing waste and conserving energy are both part of MGM Resorts International’s strategic plan for environmental responsibility. DLR Group’s design for the rooftop solar array at the Mandalay Bay Resort Conference and Convention Center creates a striking presence along the Las Vegas skyline and visible proof of MGM’s sustainable commitment to both hotel guests and Las Vegas residents.

Figure 2: Instead of using standard large inverters, the Mandalay Bay array uses 203 small string inverters installed at a 15-degree to horizontal angle. To reduce DC losses, inverters are installed adjacent to the solar arrays in the tilted position. Courtesy: DLR GroupSolutions

The scope of this project encompassed the design of the second-largest rooftop solar array in the world at the Mandalay Bay Resort Conference and Convention Center in Las Vegas. As one of the first utility-scale rooftop arrays ever designed, the project consists of 21,325 modules that cover 11 acres of roof area allowing for peak energy production throughout the day, with max production in the summer months. Producing more than 6.4 MWp of clean energy, the array is configured to provide more than 20% of the hotel and casino’s power demand using a state-of-the-art monitoring and control system.

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