Mark Group is a leading global provider of energy saving solutions. Since 1974, Mark Group has helped millions of customers live more comfortably, save money on their energy bills, and reduce their carbon footprint. Mark Group provides energy efficiency improvements to thousands of customers each week from 20 offices worldwide, tailoring each improvement to meet the individual needs of home and business owners.

Mark Group's U.S. headquarters is located at The Navy Yard Clean Energy campus in Philadelphia, where it proudly continues to strengthen a growing green collar workforce. For further information, please visit www.markgroup.com.

Sunrun has partnered with Mark Group since July 2011 to bring Pennsylvania homeowners easy and affordable solar power service. The Mark Group audit and installation team is trained to identify the most cost effective measures for improving a home's energy performance, immediately reducing utility bills and increasing comfort.