Photovoltaics/Grid Connect 01

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Safer Solar
Sandia National Laboratories has developed a software program, certified by UL, just ten lines long which will continuously test the incoming power of a grid connected home from power sources such as a generator, PV plant or fuel cell. If interrupted, the system is instructed to disconnect the local source from the line, providing safety to grid service people.
Popular Science
April 2001, p. 34