11 Solar module (also referred to as: photovoltaic module): solar power generating device built up of solar cells in a circuit as a subassembly for stationary or mobile use on land, in the air or in water; single string solar module (also referred to as single string photovoltaic module): single string of solar cells connected in series only; solar system (also referred as: photovoltaic system): network-enabled power generating device built up of solar modules (also referred to as: photovoltaic modules) or single string solar modules (also referred to as: single string photovoltaic modules) for stationary or mobile use o land, in the air or in water; safety, current-shaping a control devices for solar modules (also referred to as photovoltaic modules) or solar systems (also referred to as: photovoltaic systems);special switches for bypass diodes, rectifiers and inverters, voltage limit over and undervoltage relays etc for solar power generators; solar collector: device built up of module for heating fluids using solar radiation for stationary mobile use on land, in the air or in water; solar collector system: large installation built up of solar collectors heating fluids using solar radiation for stationary or mobile use on land, in the air or in water; safety and control device for solar collectors or solar collector systems: special switches and devices for pumps, valves, containers etc for solar heat generators; hybrid module: device consisting of solar modules (also referred to as: photovoltaic modules) in conjunction with solar collectors for the synergetic multiple use o solar radiation for stationary or mobile use on land, the air or in water; hybrid system: large installation consisting of hybrid modules for the synergetic multi use of solar radiation for stationary or mobile use on land, in the air or in water; safety, current-shaping a control device for hybrid modules or hybrid systems special switches for bypass diodes, rectifiers and inverters, voltage limiting, over- and undervoltage relays etc. for solar power generators and devices for pumps, valves, containers etc for solar heat generators; tracking system for solar modules (also referred to as: photovoltaic modules) or solar system (also referred to as: photovoltaic systems) or solar collectors or solar collector systems or hybrid module or hybrid systems: devices for optimizing orientation towards solar radiation; safety and control device for tracking systems: special switches, sensor systems e for determining the direction of solar radiation and steering the adjustment and control elements; attachment elements for solar modules (also referred to as: photovoltaic modules), solar systems (also referred to as: photovoltaic systems), solar collectors, solar collector systems, hybrid modules o hybrid systems in, on or next to roofs of all orientations, walls, stationary or mobile frames etc, use on land, in the air or in water