With the development and progress of solar photovoltaic technology, solar cells as a new energy, first applied in the civilian aspects of the lighting, solar lighting products due to environmental protection and energy saving dual advantage. The solar LED lighting products is the next generation of green lighting products, and its main components, including solar photovoltaic cells (PV) and semiconductor lighting (LEDs). LED solar lights integrated solar photovoltaic and LED solid state lighting the advantages of solar LED lighting systems to achieve the perfect combination of a new generation of energy and a new light. However, in the design of solar lighting, involving light, solar battery systems, battery charge and discharge control of a number of factors, any part of a problem will result in product defects.
A first look at solar lighting composed of:
The key lies in solar photovoltaic technology and LED lighting (stealth led grow light reviews) a perfect combination of both direct current, low voltage and can be matched. The combination of the two do not need the solar cells produce direct current into alternating current, thus greatly improving the efficiency of the entire lighting system. The same time, by means of network technology or the use of battery charge and discharge energy, to make it more obvious advantages.
1, solar panels
2, the charge and discharge controller
3, the battery
4, the load
5, shell lamps
Second, the design used must be noted: (LED lawn lamps (stealth led grow light reviews) , for example)
LED characteristics close to the Zener diode, the work of change in voltage 0,1 V, operating current of may change 20mA or so. For security, under ordinary circumstances, using a series current limiting resistor, a great deal of energy loss is clearly not suitable for solar lawn lamp, and LED brightness changes with the operating voltage. The boost circuit is a good way, you can also use a simple constant current circuit, in short, must be automatic current limiting, otherwise will damage the LED lights.
2, the peak current of the general LED 50 100mA, reverse voltage of about 6V, careful not to exceed this limit, especially in the reverse polarity of solar battery or battery no-load, high peak voltage boost circuit is likely to exceed this limit, damage LED (stealth led grow light reviews) .
3, LED temperature characteristic is not good, the temperature rises 5 ° C decreased by 3% luminous flux, summer should pay attention to.
The operating voltage discrete, the same model, same batch of LED street lights operating voltage has some differences, and should not be used in parallel. Must be used in parallel, you should consider are flow.