Energy Star Small Business Program
Energy efficiency information and guidelines
MassCEC: Energy Efficiency and Conservation
Provides financial assistance to individuals and businesses for the installation of air-source and ground-source heat pumps and solar hot water systems.
MassCEC: Commercial Solar
Solar PV resources for businesses.
Massachusetts Department of Energy Resources
Assistance for businesses
Sustainable Business Network of Massachusetts
SBNMass is an organization of business leaders committed to "changing the way the world does business."