Abstract: The invention relates to a power control device for a power grid and to a method for controlling the operation of a power control device. To allow a consumer unit connected to the power control device to be supplied with energy in an optimized manner in accordance with its requirements, a power control device according to the invention is proposed, said device comprising a power generation unit, in particular a photovoltaic unit, for generating power from renewable resources, an energy storage unit for storing energy, a load connection unit for connecting the power control device to a consumer unit for consuming energy, a grid unit, in particular an inverter unit, for connecting the power control device to a power grid, for drawing energy from the power grid and for feeding energy into the power grid, and a control unit for controlling a flow of energy between the power generation unit, the energy storage unit, the consumer unit and/or the power grid.

Abstract: The invention relates to a power inverter circuit for coupling a power station to a power supply system. The invention addresses the problem to reduce the risk of damages to components of the power station and the power supply system in the course of coupling action by providing a power inverter circuit for adjusting symmetry of the AC voltage before coupling the inverter output to a load, comprising: first switching means for selectively connecting a positive voltage to the inverter circuit output, second switching means for selectively connecting a negative voltage to the inverter output, and ohmic resistance means coupled in parallel to the inverter output, a controller for selectively switching the first and second switching means with a switching frequency to produce an AC voltage from the positive and negative voltage, wherein the controller is adapted to alter the duty ratio of the switching frequency to adjust the symmetry of the AC voltage produced by the inverter.

Abstract: The invention relates to a standalone unit for a standalone power grid, to a standalone power grid comprising a standalone unit and to a method for controlling a standalone power grid. In order to permit reduced recourse to an external power grid or public power grid, the standalone unit according to the invention comprises a power generation unit, in particular a photovoltaic unit, for generating power from renewable resources, an energy storage unit for storing energy, a load connection unit for connecting the standalone unit to a load unit for consuming energy, a grid unit, in particular an inverter unit, for connecting the standalone unit to a power grid, for drawing energy from the power grid and for feeding energy into the power grid, and an interface unit for communicating an energy withdrawal request and/or an energy storage request with a second standalone unit.

Abstract: The present invention concerns a circuit arrangement (1) for electrically coupling a direct-current source (2) to a direct-current load, including a first and a second current input node (11, 12) for receiving a direct current generated by the direct-current source, a first and a second current output node (21, 22) for the delivery of the generated direct current to the direct-current load, an isolating means (4) connected between the first current input node (11) and the first current output node (21) and/or the second current input node (12) and the second current output node (22) for interrupting the electrical connection between the respective nodes, and an auxiliary switching means (14) connected between the first current input node (11) and the second current input node (12) for short-circuiting of the first and second current input nodes (11, 12).

Abstract: Modular solar collector, comprising a first supporting stand, the first supporting stand having at its upper end a first pivot bearing point defining a pivotal axis, a second supporting stand, having at its upper end a second pivot bearing point of the pivotal axis, an intermediate supporting stand having at its upper end an intermediate pivot bearing point of the pivotal axis, a first solar collector unit comprising at least one solar collector panel and a first unit frame being pivotally mounted to the first pivot bearing point and an intermediate pivot bearing point, and a second solar collector unit comprising at least one solar collector panel and a second unit frame being pivotally mounted to the second pivot bearing point and an intermediate pivot bearing point, a pivotal drive assembly comprising an x-drive unit and an x-coupling wherein each unit frame is, mechanically coupled to its adjacent unit frame.

Abstract: The invention concerns a building for accommodating waste heat-generating electrical apparatuses, in particular an inverter building, including an air inlet, an air outlet, an air supply passage downstream of the air inlet in the flow direction, and at least one ventilation device for generating an air flow from the air inlet to the air outlet. According to the invention the air supply passage extends from the inlet opening to a lower flow chamber beneath the inlet opening and the ventilation device is arranged in the lower flow chamber. The invention concerns a building for accommodating waste heat-generating electrical apparatuses, in particular an inverter building, including an air inlet, an air outlet, an air supply passage downstream of the air inlet in the flow direction, and at least one ventilation device for generating an air flow from the air inlet to the air outlet.

Abstract: The present invention concerns a circuit arrangement (1) for electrically coupling a direct-current source (2) to a direct-current load, including a first and a second current input node (11, 12) for receiving a direct current generated by the direct-current source, a first and a second current output node (21, 22) for the delivery of the generated direct current to the direct-current load, an isolating means (4) connected between the first current input node (11) and the first current output node (21) and/or the second current input node (12) and the second current output node (22) for interrupting the electrical connection between the respective nodes, and an auxiliary switching means (14) connected between the first current input node (11) and the second current input node (12) for short-circuiting of the first and second current input nodes (11, 12).

Abstract: The invention relates to a standalone unit for a standalone power grid, to a standalone power grid comprising a standalone unit and to a method for controlling a standalone power grid. In order to permit reduced recourse to an external power grid or public power grid, the standalone unit according to the invention comprises a power generation unit, in particular a photovoltaic unit, for generating power from renewable resources, an energy storage unit for storing energy, a load connection unit for connecting the standalone unit to a load unit for consuming energy, a grid unit, in particular an inverter unit, for connecting the standalone unit to a power grid, for drawing energy from the power grid and for feeding energy into the power grid, and an interface unit for communicating an energy withdrawal request and/or an energy storage request with a second standalone unit.

Abstract: The invention relates to a power control device for a power grid and to a method for controlling the operation of a power control device. To allow a consumer unit connected to the power control device to be supplied with energy in an optimized manner in accordance with its requirements, a power control device according to the invention is proposed, said device comprising a power generation unit, in particular a photovoltaic unit, for generating power from renewable resources, an energy storage unit for storing energy, a load connection unit for connecting the power control device to a consumer unit for consuming energy, a grid unit, in particular an inverter unit, for connecting the power control device to a power grid, for drawing energy from the power grid and for feeding energy into the power grid, and a control unit for controlling a flow of energy between the power generation unit, the energy storage unit, the consumer unit and/or the power grid.

Abstract: The invention relates to a modular solar collector arrangement, comprising a first supporting stand at a first end of the solar collector arrangement, the first supporting stand having at its upper end a first pivot bearing point defining a pivotal axis extending in longitudinal direction of the solar collector arrangement, a second supporting stand at a second end of the solar collector arrangement opposite to the first end in the longitudinal direction, the second supporting stand having at its upper end a second pivot bearing point of the pivotal axis, an intermediate supporting stand extending in vertical direction and having at its upper end an intermediate pivot bearing point of the pivotal axis, the intermediate supporting stand further comprising at its lower end at least two intermediate bases being arranged in a distance orthogonal to the longitudinal direction to each other, a first solar collector unit comprising at least one solar collector panel and a first unit frame to which the panel is mount