| 摘要 |
The invention relates to an apparatus for monitoring individual photovoltaic modules of a photovoltaic system. A device for determining and/or evaluating electrical parameters of a photovoltaic module, in particular the voltage U and/or the current I, is connected to each of several photovoltaic modules, and at least one device for determining and/or evaluating electrical parameters of a photovoltaic module is coupled to a center in order to transmit data to said center in a wireless way and in intervals rather than in a permanent, i.e. uninterrupted, manner. The data is transmitted without modifying the frequency spectrum of an output variable of the respective photovoltaic module and by means of electromagnetic waves. Finally, the data to be transmitted is modulated onto an oscillator signal and is ultimately emitted via an antenna. |
