Five Years of Residential Photovoltaic System Experience at Tucson Electric Power

ABSTRACT Tucson Electric Power Company (TEP) is a U.S. utility leader in the early adoption of photovoltaic power generation with over 6.0 MWdc of grid-connected photovoltaic (PV) systems installed in its service territory since 2000. A significant element of the TEP photovoltaic effort is the SunShare PV hardware buy-down program that has been offered to TEP customers since 2001. During the past five years, 282 residentialsize systems totaling 655 kWdc of crystalline silicon collectors have been installed in the Tucson area through SunShare. Much has been learned regarding performance, cost, maintenance, installation, and design of these systems. This article presents an assessment of these topics and a perspective associated with a family of systems within this PV program.