1. Solar panel + circuit + lithium battery + box, it's successful
2. Simply find a 5.5--6V solar panel and connect an IN5819 diode in series in the forward direction. If you charge your phone directly, the charging current depends on the output current of the solar panel you choose.
3. The specifications of the solar panel are 6V, 0.33A. Looking at the voltage, it is actually 18 small cells connected in series, each cell is 0.5V, so the open circuit voltage is of 9 V. Actual charging depends on the intensity range of sunlight. The voltage is 6.3-6.9V, just enough to charge the 6V battery, no charger needed.
4. It is cut from a large battery sheet of 15.6*15.6 square centimeters, because the size of the large battery sheet is about 3.5W, 6.6A is calculated in slices of 0.33 A, and each small battery sheet measures 12 inapproximately square centimeters.
5. Check the junction box behind the solar panel to see if there are rectifier diodes connected in series to the positive and negative wires inside. This prevents reverse charging. If not, add one.
Okay, polysilicon. 1. Monocrystalline Silicon Polycrystalline silicon is a raw material used to make solar panels. 2. Silicon is an extremely abundant element on earth. It is present almost everywhere and can be considered inexhaustible. There is no shortage of raw materials for manufacturing silicon-based solar cells. 3. The speed of polycrystalline silicon solar panels is generally two to three times that of monocrystalline silicon, and the voltage should be stable. 4. The manufacturing process of polycrystalline silicon solar cells is similar to that of monocrystalline silicon solar cells, and the efficiencyphotoelectric conversion is about 12%, which is slightly lower than that of monocrystalline silicon solar cells. However, the manufacturing of the material is simple and convenient, consumes less energy, and the total production cost is low, so it has been greatly developed.
Single crystal has a high conversion efficiency and is expensive; polycrystalline has low conversion efficiency and is cheap.
There are many polycrystals in the domestic market, or they are all polycrystals.
The Japanese market is very popular recently, but Japan's requirements are very high and they are all monocrystalline. People's idea of Japan is to do your best and do it right the first time. It has very high requirements for mitigation effectiveness, and we need to learn from that at home.