Mission

    Our mission is to design and improve energy efficiency, solar hot water and photovoltaic systems in Hawaii and similar climates and to provide data and information to encourage use of alternative energy.

Our Services

  • Solar System Monitoring
  • Energy Audits
  • System Design
  • Site & Shade Evaluation
  • Maintenance and Troubleshooting
  • Classes for Homeowners and Contractors
  • Energy Efficiency Evaluation for Suitability of Solar Technologies
  • Work with Condos to help them Save Energy

Welcome to Energy Consulting Associates, LLC


ECA was created to help businesses and homeowners save energy. We do energy surveys to find ways to improve energy efficiency and use energy monitoring, project management, and training to empower the customer to significantly reduce energy usage.



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About ECA Founder, WIlliam S. Bennett

William Bennett, founder of Energy Consulting Associates, LLC, has a BS in Electrical Engineering and is certified in Energy Management and EMF measurements. He worked as an aerospace engineer for twenty-five years and served as a member of the Hubble space telescope design team.


Willy first began working in the solar field on Maui in 1975. In the late 1990s, after a period on the mainland, he returned to Maui to manage a solar company. He then began creating and researching more efficient solar hot water systems. He worked with Maui Electric (MECO) as an Energy Management Consultant for commercial enterprises for seven years, and presently serves as a consultant for them.

Willy is the founder of the Hawaii Energy Test Laboratory at Maui Community College, and currently is an instructor in the Sustainable Technology Construction Program at MCC. He serves on the board of the Solar Rating and Certification Corporation (SRCC), is a member of the American Solar Energy Society (ASES), and is a member of ASHRAE, the American Society of Heating, Refrigeration and Air Conditioning Engineers.