on photovoltaic power generation system in order to obtain free energy, such ideas and practices are ridiculous. Photovoltaic power generation system itself is not currently possible to decrease the effectiveness of electricity, and only in the use of photovoltaic power low-voltage DC power supply only when the electricity-rectified buck than with cost-effective, its use in public lighting on the building not only reduces the insanity workout of power load, also added a number of important functions in this case, the high non-inverter PV-powered lighting system to the underground parking lot into practical technology. Evaluation of the actual project 2 2.1 photovoltaic Rivoli, Dongguan Shenzhen Union Properties lighting system used in the new high-end residential project, north face denali ground construction by the high-rise buildings, small and white composition of high-rise buildings and villas, underground car park and the rugged hillside terrain, parking space around the different height, up to 8 meters, the lowest 2.3 m , 1,000 parking spaces, sub-7 fire isolated areas. The case of non-high-efficiency solar power inverter technology, combined with ground lighting,
construction of stairs, corridor lighting, lighting, elevator and fire evacuation and fire emergency lighting illuminated signs, unified planning, an underground fire zone of separation as a unit, the installation of 64 separate mac brushes -sized photovoltaic systems, DC lighting led about 3000. If the project uses the inverter and network solutions, to build a large area dedicated to the roof, and also need a special room dedicated to the cable through the firewall. In addition, from the efficiency calculation, a single power supply system than the required number of photovoltaic cells mac makeup more than twice of non-inverter systems. If you build a photovoltaic power supply system, the cost of a traditional parking lot lighting system 4 to 6 times, but also may not be able to work properly. Ordinary light from the parking lot lighting, running lights, parking lights and emergency exit lights, fire evacuation lights combined into lighting systems. Constant light use efficiency and long life non-polar magnetic induction lamps, other lighting fixtures all use level semiconductor
