Panorama of the Photovoltaic Industry Chain: Value Creation from "Sand" to "Electricity"
2025-11-21
The photovoltaic industry chain is a complete industrial system that converts solar energy into electrical energy, which can be clearly divided into three major links:
Upstream: Manufacturing of raw materials and equipment
Silicon material process: Extracting high-purity polycrystalline silicon (purity>99.9999%) from quartz sand is the starting point of the industrial chain, with high technical barriers and large investment. By 2025, the global production capacity will be about 800000 tons, with China accounting for over 85%
Silicon wafer manufacturing: The silicon material is drawn into single/polycrystalline silicon ingots and cut into thin slices (thickness has been reduced from 200 μ m to below 130 μ m). By 2024, China's silicon wafer production will exceed 400GW, accounting for over 90% of the global total
Midstream: Production of photovoltaic core components
Battery cells: PN junctions are made from silicon wafers through diffusion, etching, and other processes. The mainstream technologies by 2025 are TOPCon (83% market share), HJT (6.4%), and XBC (20%), with conversion efficiencies of 25.4%, 25.6%, and 26.0%, respectively
Component packaging: The solar cells are laminated with glass, EVA film, and backsheet to form photovoltaic modules that can directly generate electricity. In 2024, China's module production will be about 450GW, with exports accounting for more than 60%
Downstream: System Integration and Application
Inverter: Convert DC to AC, with a market share of 35% in the global leading solar power supply market. String inverters are suitable for distributed and centralized use in large ground power stations
Bracket system: fixing components and optimizing lighting angles, including fixed and single/double axis tracking systems, the tracking system can increase power generation by 25% -40%
Photovoltaic power stations: divided into centralized (large-scale desert power stations), distributed (rooftop/commercial), microgrid, and off grid systems, each with its own applicable scenarios
The trend of industrial chain collaboration: vertical integration has become mainstream, with top enterprises achieving an integration rate of over 80% for "silicon wafer battery module", significantly reducing costs and quality risks; At the same time, specialized division of labor is deepening, such as enterprises focusing on sub sectors such as inverters and brackets gaining a premium through technological advantages
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