How much do You Know about the Skills of Solar Panels?
Solar panels are devices that directly convert light energy into electrical energy through a photoelectric effect or photochemical effect. Thin-film solar cells working with photoelectric effect are the mainstream. How to choose and buy fold out solar panels puzzles some people? Today, I will briefly introduce the knowledge about the purchase of fold out solar panels, hoping to help you.
At present, fold out solar panels on the market are divided into amorphous silicon and crystalline silicon. Crystalline silicon can be divided into polycrystalline silicon and monocrystalline silicon. The photoelectric conversion efficiency of the three materials is: monocrystalline silicon (up to 17%) > polycrystalline silicon (12 ~ 15%) > amorphous silicon (about 5%). However, crystalline silicon (monocrystalline silicon and polycrystalline silicon) does not generate current under weak light, and amorphous silicon has a good weak light type (there is little energy under weak light). Therefore, in general, monocrystalline silicon or polycrystalline silicon solar cell materials should be used.
When we buy 110W suitcase solar panels, we focus on the power of solar panels. Generally speaking, the power of solar panels is proportional to the area of solar wafers. The area of solar cell chips is not completely equal to the area of solar packaged panels, because although some 110W suitcase solar panels are large, the gap of single solar chips is very wide, so the power of such solar panels is not necessarily high.
With the wide use of various solar products, 110W suitcase solar panels are more and more widely used in our life. But facing all kinds of solar panels on the market, how should we choose?
- Selection of battery capacity for solar panels
As the input energy of the solar photovoltaic power generation system is extremely unstable, it generally needs to be equipped with a battery system to work, and solar lamps are no exception, which 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. Generally, the selection of battery capacity should follow the following principles: first, on the premise of meeting the lighting at night, store the energy of solar cell modules during the day as much as possible, and at the same time, store the electric energy to meet the lighting needs at night in continuous rainy days. The battery capacity is too small to meet the needs of night lighting, and the battery capacity is too large. On the one hand, the battery is always in a state of power loss, which affects the service life of the battery and causes waste.
- Selection of solar panel DC connector packaging form
At present, there are two main packaging forms of solar panels, lamination and glue dropping. The lamination process can ensure the working life of solar cells for more than 25 years. Although glue dropping was beautiful at that time, the working life of solar panels is only 1-2 years. Therefore, low-power solar lawn lamps below 1W can be packaged in the form of dripping glue without excessive service life requirements. For solar lamps with specified service life, it is recommended to use laminated packaging. In addition, there is a kind of silicone gel used to encapsulate solar cells with dripping glue. It is said that the working life can reach 10 years.
- Selection of solar panel DC connector power
The output power WP of the solar panel dc connector we mentioned is the output power of the solar cell under the standard sunlight conditions, that is, under the 101 standard defined by the European Commission, the radiation intensity is 1000W/m2, the atmospheric quality is AM1.5, and the battery temperature is 25 ℃. This condition is about the same as that of the sun around noon in peacetime and on sunny days. This is not like what some people think. As long as there is sunshine, there will be rated output power. Even they think that solar panels can be used normally under fluorescent lights at night. That is to say, the output power of solar panels is random, and the output power of the same solar cell is different at different times and places. Most solar lamps choose energy conservation between beauty and energy conservation.