Back in 2003 a housing development became California’s largest zero energy community with single family homes and an apartment complex powered by solar. Built by Clarum Homes, Vista Montaña in Watsonville was designed to reduce homeowner energy bills by up to 90 percent. Carrying the Zero Energy Home designation from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL), the development housed the largest building-integrated solar electric system in an apartment community in the United States. The 60-kilowatt system by GE made it possible for this community to produce over 90 megawatt hours of electricity annually. In total, Vista Montana has 177 single-family homes, 80 townhouses, and 132 apartments that were built with 1.2 to 2.4 kWp, and with a calculated energy yield of 1400 kWh/kWp.
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