Photovoltaic array need to install barbed wire?

As the country support and promotion of photovoltaic industry, more and more friends begin to join in photovoltaic 'wet person'. Photovoltaic array need not to need to add the wire fence? Do not recommend installing wire fence. For photovoltaic array

as the country vigorously support and the promotion of photovoltaic industry, more and more friends began to join to the family pv 'lead'. Photovoltaic array need to install barbed wire? It is not recommended to install barbed wire. Because install barbed wire in the photovoltaic array may create a shadow on components, forming hot effect, affect the overall efficiency of the photovoltaic power station. In addition, due to the qualified photovoltaic modules has passed the hockey impact test, generally do not need to install fence. If the power is cut off, use distributed photovoltaic (pv) grid system can run normally? After the power cut off, with generally distributed photovoltaic system will stop running, unable to normal power. In some extreme cases, however, isolated island phenomenon could occur, namely after power cut, household distributed photovoltaic system will continue to part load operation, affect the personal safety of maintenance personnel, and has the potential damage to household electrical appliances and electric grid system. Therefore, the distributed photovoltaic system must have the function of the island. After connected to the Internet, we used our homes are how to distinguish between the electricity from the grid or our own system? Distributed photovoltaic system after the installation is complete, power grid companies will be hooked up to the inspection and acceptance. After acceptance, will install two meters in owner's home. Two meters will be measured photovoltaic power generation and power consumption of commercial power supply system. A simple method is to look at the meter. As long as the meter readings on the photovoltaic system, it USES the solar cell module to produce electricity. System to produce electricity is stored up during the day, night lighting likely? Distributed photovoltaic power generation system to produce energy during the day can be stored and used for lighting at night, the need to increase the electrical components such as controller and battery. During the day, the controller will generate electrical energy stored in the storage battery, photovoltaic (pv) in the evening, the controller release of energy stored in the storage battery used for lighting. If there is no energy storage devices, if the power is cut off, the system will stop working, but if the grid inverter is intelligent network micro inverter ( Hybrid grid and off-grid inverter) Instead, the system can still run normally.