Polycrystalline silicon solar cells have the advantages of high conversion efficiency and long life of monocrystalline silicon cells and relatively simplified material preparation process of amorphous silicon thin film cells. The conversion efficiency is generally about 17-18%, slightly lower than that of monocrystalline Crystalline silicon solar cells have no obvious efficiency degradation problem and can be fabricated on inexpensive substrate materials. The cost is much lower than that of monocrystalline silicon cells, and the efficiency is higher than that of amorphous silicon thin film cells.
Application fields of polycrystalline silicon solar cells
1. User solar power supply: (1) Small power supply ranging from 10-100W, used for military and civilian life in remote areas without electricity, such as plateaus, islands, pastoral areas, border posts, etc., such as lighting, TV, tape recorders, etc.; (2) 3 - 5KW household rooftop grid-connected power generation system; (3) Photovoltaic water pump: solves the problem of drinking and irrigation in deep wells in areas without electricity.
2. Traffic field: such as beacon lights, traffic/railway signal lights, traffic warning/signal lights, Yuxiang street lights, high-altitude obstacle lights, highway/railway wireless phone booths, unattended road shift power supply, etc.
3. Communication/communication field: solar unattended microwave relay station, optical cable maintenance station, broadcasting/communication/paging power supply system; rural carrier telephone photovoltaic system, small communication machine, GPS power supply for soldiers, etc.
4. Petroleum, marine and meteorological fields: cathodic protection solar power system for oil pipelines and reservoir gates, life and emergency power supply for oil drilling platforms, marine detection equipment, meteorological/hydrological observation equipment, etc.
5. Power supply for household lamps: such as garden lamps, street lamps, portable lamps, camping lamps, mountaineering lamps, fishing lamps, black light lamps, tapping lamps, energy-saving lamps, etc.
6. Photovoltaic power station: 10KW-50MW independent photovoltaic power station, wind-solar (diesel) complementary power station, various large parking plant charging stations, etc.
7. Solar buildings: Combining solar power generation with building materials will enable large buildings in the future to achieve self-sufficiency in electricity, which is a major development direction in the future.
8. Other fields include: (1) Matching with automobiles: solar vehicles/electric vehicles, battery charging equipment, automobile air conditioners, ventilation fans, cold drink boxes, etc.; (2) Recycling of solar hydrogen production and fuel cells