The device models SolarMax 50TS, 80TS and 100TS were tested and certified by the accredited Fraunhofer Institute for Solar Energy systems and by the certification office Bureau Veritas. Since 1 April 2011 grid-connected photovoltaic inverters with direct medium-voltage connection installed in Germany must prove their compliance with the BDEW directive by means of the type certificate.
The first requirements of the directive introduced on the basis of the strong annex of solar power plants already came into effect in 2009. The directive requires that photovoltaic inverters no longer must shutdown in the event of a short-term failure of the grid, but must support the grid dynamically. Furthermore, photovoltaic systems must maintain the static voltage in the future by providing and/or procuring reactive power and compensate voltage fluctuations in the grid this way.
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