How to purchase solar landscape lights

 1, solar panels

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u003cbru003e    The main function of solar panels is to convert light energy into electrical energy. This phenomenon is called the photovoltaic effect. Among many solar cells, the most common and practical ones are mainly monocrystalline silicon solar cells, which will be much cheaper than monocrystalline silicon cells, and the conversion efficiency has also been continuously improved in recent years. In the southern regions where there is a lot of sunlight on cloudy and rainy days, it is better to use monocrystalline silicon solar cells because the electrical performance parameters of monocrystalline silicon solar cells are relatively stable. Amorphous silicon solar cells are better when indoor sunlight is weak, because amorphous silicon solar cells have relatively low requirements for sunlight conditions.

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u003cbru003e   For a monolithic solar cell, it is a PN junction. In addition to generating electricity when sunlight shines on it, it also has all the characteristics of a PN junction. Under standard lighting conditions, the rated output voltage of the solar landscape light is 0.48V. The solar cell modules used in solar lighting fixtures are composed of multiple solar cells connected together.

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u003cbru003e   2, solar charge and discharge controller

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u003cbru003e   Regardless of the size of solar lamps, a good charging and discharging control circuit is essential. In order to extend the service life of the battery, its charging and discharging conditions must be restricted. Solar landscape light manufacturers prevent the battery from overcharging and deep discharge. In addition, because the input energy of the solar photovoltaic power generation system is extremely unstable, the control of battery charging in the photovoltaic power generation system is more complicated than the control of ordinary battery charging. For the design of solar lamps, success and failure often depend on the success and failure of the charge and discharge control circuit. Without a good charge and discharge control circuit, solar lamps will not work well.

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u003cbru003e   3, solar energy storage battery

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u003cbru003e   Because the input energy of the solar photovoltaic power generation system is not stable enough, it generally needs to be equipped with a battery system to work, and solar lamps are no exception. They must be equipped with a battery to work. Generally, there are lead-acid batteries, Ni-Cd batteries, and Ni-H batteries. Their capacity selection directly affects the reliability and price of the system. The selection of battery capacity generally follows the following principles: First, on the premise of meeting the night lighting, store the energy of the solar cell components during the day as much as possible, and at the same time, it must be able to store the electrical energy that can meet the lighting needs of continuous rainy days at night. The battery capacity is too small to meet the needs of night lighting or continuous use; the battery capacity is too large, and the battery board cannot provide sufficient charging current, the battery is often in a state of power loss, which affects the battery life and is easy to cause waste .