Kailua-based Sunetric, one of Hawaii’s leading renewable energy and solar installation companies, is expanding to the mainland.

The company said  it will open offices in Denver, Pittsburgh and Washington, D.C.

“Strategically located regional offices will allow the company to effectively pursue public and private-sector opportunities throughout the country while staying based in Hawaii, where it will continue to grow its existing residential, commercial, and government business,” the company said in a news release.

In addition to installing photovoltaic solar systems, Sunetric will offer a new range of services on the mainland, including energy audits and total building energy-efficiency upgrades.

“There are a growing number of renewable energy opportunities across the country for a company with the experience and versatility of Sunetric,” said chief executive officer Alex Tiller.

 Sunetric, a fully integrated solar company, has 140 employees and estimated 2011 sales of more than $130 million.