Bill Naito Co. now has one of the largest private rooftop solar installations in the Portland area at its Montgomery Park property. The panels are able to generate a bit more than 1 megawatt annually. About 40% of the panels are on the 577K SF Montgomery Park office building, with the balance on a nearby parking structure and two other buildings, the Portland Business Journal reports.

The 3,068 335-watt panels were installed by Portland-based Imagine Energy. The energy company said the project was completed “after four protracted historic reviews; six crane lifts, including a 300-ton crane mobilization to set the 150-foot trusses; a major electrical service upgrade; and the many other complications that attend any project of this scale and complexity.”

The installation is among the largest in Portland. Other major rooftop solar systems include the 2.4-megawatt ProLogis 7 warehouse project; the Oregon Convention Center's two-megawatt system; and the Portland Habilitation Center, which sports an 858-kilowatt array.