1. Look at the color: Generally speaking, the appearance color of monocrystalline silicon and polycrystalline silicon panels is blue, and they are relatively uniform light blue or sky blue. If the color of the battery panel is dark and different, it may not be meticulous in manufacturing.
2. Look at the surface: The tempered glass surface of the battery panel should be smooth and free of foreign objects. In order to increase production speed, some small manufacturers do not clean the silica gel flowing on the surface of tempered glass. If the silica gel is not cleaned, it will affect the efficiency of power generation.
3. Check the Silicone: Check if the silicone is evenly distributed around the back and has penetrated the gap between the back panel and the frame. Observe carefully whether there are any leaks in the welding of the battery cell strings. Also check if theBattery cells are arranged in an orderly manner.
4. Look at the junction box: Finally, check whether the junction box is firm and whether the junction box cover can be firmly and firmly attached to the junction box; whether the anti-theft wire can rotate freely; and if it can be tightened.
5. Look at the price: The safest way is to compare prices. Domestic battery panel prices fluctuate. Although they are not absolute, there is a general range. If the price quoted by the manufacturer is much lower than the market price, then you need to make a careful distinction.
What are the advantages and disadvantages of different types of solar panels?
1. The sunlight angle required for strong light should be more standard, and there should be enough sunlight. The sun will not produce electricity if it is blocked by clouds;
2. Low Anglelighting and the required light intensity are not so high. As long as there is light, it can generate electricity, and the dim light in the morning can generate electricity.
Solar cells, also known as solar chips or photovoltaic cells, are optoelectronic semiconductor sheets that use sunlight to directly generate electricity . As long as it is illuminated by light that meets certain lighting conditions, it can instantly produce voltage and generate current if there is a loop.
Cadmium sulfide and cadmium telluride polycrystalline thin-film solar cells are more efficient than amorphous silicon thin-film solar cells, less expensive than monocrystalline silicon cells, and are easy to mass produce, but Due to cadmium, it is highly toxic and will cause serious pollutionn of the environment. So it is not the most ideal substitute for crystalline silicon solar cells.