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Data report for the Southwest Residential Experiment Station, April 1982

Physical performance data obtained from the photovoltaic energy systems under test at the Southwest Residential Experiment Station in New Mexico are tabulated for the month of March 1982. Eight prototype residential photovoltaic systems are under test, each consisting of a roof-mounted photovoltaic array sized to meet at least 50% of the annual electric demand of an energy-conserving house. An enclosed structure houses the remainder of the photovoltaic system equipment, test instrumentation, and work space. Each system is grid-connected. Features of the residential photovoltaic systems and monitored houses are tabulated. A monthly summary is provided of meteorological data, monitored house information, and photovoltaic array, power conditioning unit, and utility interface data. Monthly averages for each hour of an average day are given of total electric energy used by each house, and of array output, inverter output, load, energy supplied to and by utility, maximum power, and total tilt insolation for each prototype system. Hypothetical data are also given of energy supplied to and from the utility at each monitored house for each hour if each prototype photovoltaic system were installed there. Energy histograms are provided for each prototype system. (LEW)