The paper is a summary of the Photovoltaics for Utility Scale Applications (PVUSA) Project’s experience with procurement, testing, operation and maintenance of photovoltaic (PV) power conditioning units (PCUs) at the PVUSA Davis and Kerman sites. Brief descriptions of each of five different PCU models are included to explain tests and operational characteristics. A comparison of the PCUs’ performances is presented, and conclusions are offered. Further details are in a forthcoming PVUSA report on PCUs and Power Quality [1].

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