Corporate America wasn't always quick to embrace solar technology.

Upfront costs are often pricey, and payback isn't immediate.

But a partnership between Staples and solar provider SunEdison in Hanover made possible what they say is Maryland's largest single rooftop solar power.

"It's really taking technology that's been around for a while and looking at it with a non-traditional business model," said Mark Buckley, Staples' vice president of environmental affairs. "I think there was always a concern about making capital investments and making those payoffs."

On Wednesday,...