National Semiconductor Corp. recently announced results of rigorous internal reliability testing for its SolarMagic™ power optimizers. The results of the tests demonstrate SolarMagic has an industry-leading mean time between failures (MTBF) of 455 years which, when coupled with its 20-year warranty, make National's SolarMagic power optimizer one of the most reliable electronic photovoltaic (PV) system components available. SolarMagic improves the output of solar arrays when affected by real-world conditions such as shade, debris and panel aging.
SolarMagic power optimizers became available to customers in North America and Europe in late May.
National designed SolarMagic to have a very high reliability by incorporating proper component derating, extensive reliability Failure Modes and Effects Analysis (FMEA), thermal analysis and pre-qualification reliability testing.
National's SolarMagic power optimizers have passed rigorous environmental qualification tests such as damp-heat exposure, humidity-freeze cycling and thermal cycling used for PV module qualifications. In addition, they have successfully undergone electronic-systems reliability qualification tests such as high temperature operating life tests, power temperature cycling and highly accelerated life tests (HALT). Data from more than two thousand hours of reliability stress testing of SolarMagic power optimizers demonstrated an MTBF of 455 years.