2009 Energy Prize Finalist

The Equinox Solar System is a passive integral collector storage (ICS) solar thermal system that uses patented heat control and heat retention technology to produce hot water up to 180 degrees Fahrenheit.

Its economical design utilizes lightweight polymer materials to minimize the need for expensive, heavy metal components. The Equinox panels are fully insulated and include mounting brackets that facilitate rapid, cost-effective installation.

Designed with a heat control valve, the Equinox Solar System is able to withstand dramatic climate changes. The valve also enables the use of cross-linked polyethylene (PEX) tubing to transport water, thus eliminating the need for expensive copper tubing. Heat loss is reduced through a heat shield consisting of a thin, double-walled polycarbonate cover that is sealed and evacuated of atmosphere. Another unique component is a plastic high-density polyethylene roto—molded heat exchanger, immersed in an ABS tank.

The Equinox Solar System was specifically designed to be economical, with a projected cost of $1,800 for a one-panel system, compared with $4,000 to $5,000 for systems currently on the market. Utilizing this system, a household of three adults could potentially save approximately 2,600 kilowatt-hours annually.

About the Finalist Team:

The Equinox Solar System is the latest invention of Bob Gumm, who has been involved in the solar industry since 1977. A lifelong resident of Redding, California, Bob is a well-known and highly regarded expert on solar thermal technology. His prior inventions include a portable solar system for field use by the military and the Solarizer drain-back system that was widely deployed throughout Northern California in the early 1980s. Through his years of experience installing various types of solar thermal systems, Bob identified the need for an efficient, low-cost solar water heater that would be much easier to install than the heavy and cumbersome panels made from glass and metal.

Teaming up with Gary Johnson, a local building contractor, Bob designed a prototype system using polymer materials that would provide similar thermal output to conventional systems. This innovative new system contained several unique features, such as a plastic heat exchanger, a thermal regulating valve and special couplings that would enable the system to be plumbed to the storage tank using PEX tubing, obviating the need for more expensive copper piping. Once commercial production begins, Bob intends to market the Equinox Solar System through a nation-wide network of franchisees that will be developed by Michael Palmer, who has a strong background in business-to-business and consumer marketing. Bob is confident that the Equinox System can be installed for approximately half the cost of comparable metal and glass systems, reducing the pay-back period to approximately three years.