The GreenSun Hawaii program works with various lenders throughout Hawaii to offer financing for renewable energy and energy efficiency upgrades. Through the program, homeowners may be eligible to finance Energy Star refrigerators, Energy Star air conditioners, solar water heating systems or heat pumps, and solar photovoltaic systems. Non-residential property owners may be eligible to finance lighting retrofits or upgrades, air conditioning, solar water heating systems, solar photovoltaic systems, and windows. An energy audit is required for non-residential property owners.