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| Number | Title | Issue Date |
| 8179000 | Photovoltaic system with battery and reserve power plant A method for operating a photovoltaic system with a plurality of photovoltaic modules and with a DC motor connected to the photovoltaic modules is proposed. The motor shaft of the DC motor is coupled to a generator shaft of a three-phase generator, wherein the three... | 05/15/2012 |
| 8138411 | Photovoltaic system The photovoltaic system includes a plurality of photovoltaic modules which are connected to form a string or several strings connected in parallel, thereby forming a photovoltaic generator having a positive terminal and negative terminal. A DC constant voltage sourc... | 03/20/2012 |
| 8115426 | Method and apparatus for connecting a photovoltaic system to a power grid An apparatus and a method for preparing connection of a photovoltaic system (Q1) as a first energy source to a power grid (13) by way of a motor generator set (5, 6, 7) is presented. The DC motor (5) is coupled to a three-phase generator ... | 02/14/2012 |
| 7609019 | Photovoltaic system and method for operating a photovoltaic system A photovoltaic system includes a plurality of photovoltaic modules and a DC motor connected to a three-phase generator driven by a shaft. The three-phase generator is connected to a power mains. The electric power supplied to the DC motor by the plurality of photovo... | 10/27/2009 |
