Solar Panels and Solar Controller

March 15, 2010

Solar street lamp by the following components: solar panels, solar controller, battery, light source, poles and lanterns shell, and some also configure the inverter.

1, solar panels

Solar street lamp solar panels in the central part of the value of solar energy in the highest part of the street. Its role is to the sun’s radiation is converted to electrical energy stored in batteries or sent to them. Monocrystalline silicon solar cells as the material mainly used. Made with silicon diodes similar to the P-N junction. Similar working principle and diode. Only in the diode, the promotion of PN junction hole and the electronic movement in an external electric field, and in the ball valves solar cell PN junction to promote and influence of the hole and the electronic movement of the sun and light photon radiation heat. Also known as the photovoltaic effect theory. Current photoelectric conversion efficiency is about the efficiency of photovoltaic cells was about 13% -15% silicon, polycrystalline silicon 11% -13%. At present the latest technology including photovoltaic thin-film batteries.

2, Solar Controller
Solar street lighting system, the most important part is the controller, its performance directly affects the system life expectancy, especially battery life. Controller MCU call the shots with industrial grade controller, through the ambient temperature measurement, battery and solar cell components of the voltage and current to determine parameters such as detection and control MOSFET device turn-on and turn-off to achieve a variety of control and protection. Huang Ming intelligent solar lighting controller can provide full protection for the battery, so battery more reliable long-term work.

With the increasing tension of global energy, solar photovoltaic street lighting has been developing rapidly. In the design of solar lighting involves a number of tache, any one part will cause problems with product defects. In order to improve the lighting system capacity utilization of the system to overcome the power shortage caused by lack of the development of solar lighting systems, people constantly on the lighting system control mode commonly used in the analysis, design practical and feasible mode of operation at the same time Lighting techniques are continually upgrading, the battery charging models are continually studying and exploring the effective utilization of higher and higher. The various components of solar energy development and coordination, solar lighting systems are constantly developed and improved.

First, the principle of solar street lights and composition

Solar lighting system for the DC-based stand-alone PV system, its working principle shown in Figure 1. Solar battery components that convert sunlight into electricity, through the controller, control and protection of electrical energy into chemical energy stored in the battery. When the electricity, the battery and then chemical energy into electrical energy for the DC loads to use, or by inverter to AC inverter for the exchange of load to use. Only when a long time without light so that the battery runs out of power, this unit was to stop working.

Solar corridor light included - were installed at the building rooftop solar cells and installation of lighting in each floor, and the uniform placement of the battery, charge and discharge controller. Battery and lighting on each floor connected by wires. Load using LED lamps, and in line with sound and light-controlled switching. During the day, solar battery components in a certain intensity, under sunlight to generate electricity through solar energy butterfly valves stored in the battery charge and discharge controller inside; night, battery charge and discharge controller for the load through the provision of electricity. Typically, solar energy systems were designed in accordance with increased battery capacity of the actual situation, the lighting team ensure the rainy days.