Ormat Technologies (ORA) announced that they have completed the construction of a 1 MW rated OrmatÂ® Energy Converter (OEC) for the APS Saguaro Solar Facility. Arizona Public Service Company (APS) is Arizona’s largest and longest-serving electric utility, serves more than one million customers in 11 of the state’s 15 counties. [ more ] The plant’s process consists of the sun’s energy being concentrated by parabolic mirrors in a trough formation to receivers. This concentrated solar energy heats up thermal oil, which then transfers its heat to the OEC power unit working fluid. Use of Organic Rankine Cycle technology facilitates generation of power even with fluctuating and low temperature heat.