News Brief

SunCache Used in Sacramento Rehab Project

California-based Harpiris Energy recently completed the first large multi-unit installation of its SunCache low-cost, plastic solar water heaters at a senior housing complex in Sacramento, California. (SunCache was named a top-10 product by BuildingGreen in 2008; see

EBN Dec. 2008.)

The Sacramento Housing and Redevelopment Agency placed 65 of the SunCache units on 37 buildings it was renovating on two sites. The passive pre-heating units draw city water into a collector and move it through a copper heat exchanger; heat is extracted from water sitting in a 50-gallon (190 l) tank that is part of the collector. The water then enters an existing water heater.

According to the company, the SunCache system may achieve annual savings of $1,000 compared to electric water heaters. Developed in part with a grant from the U.S. Department of Energy, the system costs roughly $2,000, with installation running about $3,500. It comes with a ten-year warranty, and is appropriate for warmer climates. More information is available at

Published January 1, 2010

Bragonier, E. (2010, January 1). SunCache Used in Sacramento Rehab Project. Retrieved from

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