Nanjing Sunningdale New Energy Co., Ltd. is a company dedicated to the development of engineering solar power system integration business. Off-grid solar power system is widely used in remote mountainous areas without electricity, islands, communication base stations and other application areas. PV array in the case of a light convert solar energy into electrical energy through solar charge controller to power the load, while giving the battery pack; in the absence of light, through the solar charge controller from the battery to the DC load power supply, even while the battery directly to independent inverter, inverter through independent reverse into AC power to the AC load. System consists of solar module solar module solar off-grid power system is the main part, but also the highest value of the system components. Area of ??solar modules with high specific power, long life and high reliability features, the 20-year period of use, the output power decreases generally does not exceed 20%. As the temperature changes, the battery pack current, voltage, power can be changed, the design must be considered modules in series voltage negative temperature coefficient. Solar Charge Controller Solar Charge Controller, also known as "PV Controller", whose role is issued by the solar cell module power adjustment and control. In the large temperature difference, solar controller should have temperature compensation function. Its main task is battery energy storage in order to ensure that the load at night or on cloudy days electricity. Off-grid inverter off grid inverter is off-grid solar power system is one of the core components, is responsible for converting direct current into alternating current for AC load use. Advantages compared with conventional thermal power systems, solar photovoltaic advantages mainly reflected in: 1, no depletion risk; 2, safe and reliable, no noise, no pollution emissions, clean (pollution); 3, without resources limited geographical distribution, you can use the advantages of building roof; 4, no consumption of fuel and erection of power transmission lines can be locally powered; 5, the energy of high quality; 6, short construction period, access to energy to spend a short time. The application of a system, the user of solar power: (1) Compact Power 10-100W; (2) 3-5KW family roof off-grid power system; (3) Solar pumps. Second, the transport sector such as beacon lights, traffic / railroad signals and so on. Third, the communication / communication field: Solar unattended microwave relay station. Four, petroleum, marine, meteorology areas: oil pipelines and reservoirs gate cathodic protection solar power systems. Five, the family lamp power: eg garden lights, street lights, portable lights. Six, photovoltaic power plants. Seven, solar building will combine solar power and building materials, making the future of large-scale construction to achieve self-sufficiency in electricity is a major future direction of development. Eight other areas include: 1) with auto ancillary; 2) Solar hydrogen fuel cell renewable generation system; 3) desalination equipment supply; 4) satellites, spacecraft, space solar power stations.