Polycrystalline silicon solar cells are a new generation of cells that combine the high conversion efficiency and long lifespan of monocrystalline silicon cells with the relatively simplified material preparation process of amorphous silicon thin-film cells. Their conversion efficiency is generally around 17-18%, slightly lower than that of monocrystalline silicon solar cells. They do not have obvious efficiency degradation problems and can be fabricated on inexpensive substrate materials. Their cost is much lower than that of monocrystalline silicon cells, while their efficiency is higher than that of amorphous silicon thin-film cells.
Application areas of polycrystalline silicon solar cells
1. User solar power supply: (1) Small power supply ranging from 10 to 100W, used for electricity for military and civilian life in remote areas without electricity, such as plateaus, islands, pastoral areas, and border outposts, such as lighting, television, radios, etc.; (2) 3-5KW household rooftop grid-connected power generation system; (3) Photovoltaic water pump: solve the problem of drinking water and irrigation from deep wells in areas without electricity.
2. Transportation sector: such as navigation lights, traffic/railway signal lights, traffic warning/sign lights, Yuxiang streetlights, high-altitude obstruction lights, highway/railway wireless telephone booths, unattended track maintenance station power supply, etc.
3. Communications/Telecommunications Field: Solar-powered unattended microwave relay stations, optical cable maintenance stations, broadcasting/communication/paging power systems; rural carrier telephone photovoltaic systems, small communication devices, and GPS power supply for soldiers, etc.
4. Petroleum, marine, and meteorological fields: solar power systems for cathodic protection of oil pipelines and reservoir gates, living and emergency power supplies for oil drilling platforms, marine monitoring equipment, meteorological/hydrological observation equipment, etc.
5. Power supplies for household lighting fixtures: such as garden lights, street lights, portable lights, camping lights, mountaineering lights, fishing lights, black lights, rubber tapping lights, energy-saving lights, etc.
6. Photovoltaic power stations: 10KW-50MW independent photovoltaic power stations, wind-solar (diesel) hybrid power stations, and various large parking lot charging stations, etc.
7. Solar Buildings: Combining solar power generation with building materials to enable large-scale buildings to achieve self-sufficiency in electricity is a major future development direction.
8. Other fields include: (1) Automotive accessories: solar-powered cars/electric vehicles, battery charging equipment, car air conditioners, ventilation fans, cold drink boxes, etc.; (2) Solar hydrogen production and fuel cell regenerative power generation systems; (3) Seawater desalination equipment power supply; (4) Satellites, spacecraft, space solar power stations, etc.
