Peak power is a standard solar cell under the conditions of maximum power output of solar cells, flat peak watts, or sign WP said. Solar cell output power depends on the solar radiation, sunlight, solar cells, universal distribution and operating temperature. At different times, different places, the same power output of a solar cell is different, not to some people imagine, as long as the sun will melee rated output power, set the man page in the light of solar cells can be normal use. Calculated according to the area, per square meter of solar cell output power is about 120W, with the conversion efficiency, the output power increases accordingly. Solar cell module output power options, according to the power source of solar lights, use time and local climatic and geographical conditions, etc. to determine. Solar modules in the course, if there is a solar cell alone blocked by leaves blocking a long time, monolithic solar cell was blocked in the strong heat and sunlight will damage and even cause damage to the solar cell module This is the so-called heat island effect. In order to prevent the heat island effect, the general inclination is to place solar cells, solar cell surface that can not be attached to the occluder. Of any solar lighting systems, the merits of charging and discharging control circuit was applied to the system will directly affect the success or failure. Since the input of solar energy photovoltaic power generation system unstable, photovoltaic power generation system in the control of battery charging and battery charge than the average controller to be complex. One of the good men and women should have control of photovoltaic cell controller battery charge and discharge, temperature regulation, the maximum power tracking and over-charge protection, over discharge protection, short circuit protection, reverse polarity protection and other protection features and automatic switching and time adjustment . To ensure reliable operation, while making the solar cell module can be irradiated at different temperatures and under maximum output power of intelligence to make high efficiency lighting systems. Since battery charging solar lighting system directly from the solar battery, the resulting energy is neither stable, all the reasonable capacity to configure, reliable batteries to ensure that the policy of photovoltaic power generation system work. In the solar photovoltaic lighting systems, the choices are usually maintenance-free lead-acid batteries. Maintenance-free lead-acid battery is a new type of battery, it uses all seals, the discharge rate, characteristics and stability; without adding water; installation simple, small footprint, can be horizontal and vertical installation, life expectancy is generally 5-7 years . Choose half the battery capacity principle is: first night, enough to meet the lighting requirements, and can produce solar modules during the day and try to save the energy down, while meeting Liang Xu rainy night lighting needs of the power. Battery capacity is too small can not meet the needs of night lighting, battery capacity is too large, long-term battery power in a state of loss, shorten the battery life, but also a waste of unnecessary investment. Solar street light according to the actual situation requires, in the 12-volt DC energy saving lamps, low pressure sodium, high pressure sodium lamps, electrodeless lamps, and other sources of electromagnetic induction to choose. No matter what kind of light source used, the brightness and the power source is directly in Guangxi, but also directly affect the system configuration and investment costs. Lighting conditions at the same time, the greater the light source power, breadth higher, system configuration, the greater the higher the cost; power of the smaller, lower brightness, system configuration, reduce the cost reduced. General poles, light fixtures can be used as the choice of solar objects. If the poles are used to directly program to install solar modules, solar modules based on area need to manufacture solar modules in the frame, taking into account the poles of the wind strength problems. Pole lamps and a wide choice of surface, generally to meet the use requirement can be beautiful.