Synchronization of the Facility tests to assure the synchronization capability of any power station are part of a power station’s Acceptance Tests, when a qualified tester working on behalf of the holder of a transmission license or the holder of a distribution license, as applicable, confirms that the facility meets all the conditions for feeding electrical energy from the facility into the electrical grid. In addition, the facility’s output has to be synchronized, routinely, also during its entire commercial operation lifetime, whenever it is shut down and restarted. Solar energy power stations, for example, are all peaking power stations, and are started and shut down daily