SpaceX, led by Elon Musk, has reportedly placed an order with a leading Chinese photovoltaic equipment manufacturer. If approved by relevant authorities, the shipment is expected in the first week of May. Additionally, Tesla is negotiating a potential $2.9 billion cooperation order involving multiple TOPCon equipment manufacturers.
Beyond overseas demand, domestic initiatives to achieve "dual carbon" goals (carbon reduction and carbon neutrality) are accelerating. This includes increasing installations of solar panels in rural areas and on building exteriors. During the recent National People's Congress meetings, discussions emphasized the need for the photovoltaic industry to reduce internal competition and increase consolidation. Major companies are also exploring new directions like "PV + energy storage" and "PV + AI," highlighting the critical role of solar power in the energy transition. As the industry heats up, more capital is flowing in.
For investors new to the sector, terms like photovoltaic, silicon material, inverters, and TOPCon can be confusing. Essentially, these represent different segments of the photovoltaic supply chain. This article breaks down these concepts to clarify how the industry works and where investment opportunities lie.
**01. Photovoltaics as a Primary Green Energy Source** The transition to green energy isn't just about total generation capacity. The key to rapidly replacing traditional thermal power with clean electricity lies in the efficiency of the entire supply chain—from raw materials to end-use. Any weak link reduces efficiency and increases costs. With traditional energy sources like coal and oil diminishing and environmental regulations tightening, photovoltaics have become a crucial solution. Solar power generates electricity without burning fossil fuels or causing pollution, aligning perfectly with global clean energy trends and "dual carbon" goals, making it a core future energy source.
In simple terms, photovoltaics is the technology of "generating electricity from sunlight." All related products are built around this core technology. The supply chain is straightforward: silicon material is processed into silicon wafers, which are made into electricity-generating cells. These cells are encapsulated into modules, and combined with inverters, they form a complete photovoltaic system capable of stable power generation. Multiple such systems, whether large-scale solar farms or small rooftop installations, combine to create a nationwide green power network. Photovoltaics are no longer a supplementary power source but a primary supplier of green electricity and the foundation for transitioning from traditional to clean energy.
**02. Silicon Material: The Foundational Raw Material** Silicon material, or polysilicon, is the essential raw material for photovoltaics, akin to the "food" of the industry. Without high-purity polysilicon (99.9999% or higher), subsequent manufacturing steps for wafers and cells cannot proceed. It is a key determinant of final electricity costs. The industry adage "whoever controls the silicon controls the initiative" underscores its importance. The supply and price of silicon directly impact the entire industry's costs and profitability. After a period of high prices due to shortages, increased capacity and the phasing out of outdated production have stabilized prices, allowing leading producers to return to profitability in late 2025, though integrated giants still faced overall losses.
Demand remains stable, driven by industry consolidation, expansion into high-end silicon production, and growing installations in rural and building-integrated photovoltaics. GF Futures estimates that global polysilicon production in 2026 will be roughly 140-145 million tons, including 10-15 million tons from overseas. With existing inventory, total supply could reach 170-175 million tons. On the supply side, producing polysilicon is technically challenging and energy-intensive, with new plants taking 1.5-2 years to build. Over 80% of global capacity is in China, with limited expansion elsewhere, suggesting long-term tight supply. Furthermore, national policies aimed at reducing energy consumption in production will phase out outdated facilities, leading to a more balanced supply-demand dynamic. Major Chinese companies like Tongwei, GCL Tech, Daqo New Energy, and Xinte Energy dominate high-purity silicon production and are consolidating capacity to standardize the industry.
**03. Silicon Wafers and Cells: The Intermediate Components** Polysilicon is melted, formed into ingots or rods, and sliced into thin silicon wafers. These wafers act as the substrate for generating electricity; their thickness, size, and purity directly impact final efficiency and cost. The industry trend is toward larger wafers, moving from 166mm and 182mm to 210mm, which increases power output and lowers cost per watt. If polysilicon is the raw stone, the wafer is the cut slice, and the cell is what "activates" it—using various processes to enable the conversion of solar energy into electrical energy.
Cell technology is continuously evolving. While PERC technology is nearing its efficiency limits, newer technologies like TOPCon and HJT are gaining traction. TOPCon is particularly popular due to its higher efficiency, lower cost, and suitability for mass production. Mainstream TOPCon cells now exceed 26% efficiency, a 2-3 percentage point gain over PERC, further reducing the cost of solar electricity. Chinese manufacturers produce over 90% of the world's silicon wafers and cells. As the industry consolidates, larger players are strengthening while smaller ones are phased out. By February 2026, China's monthly solar cell production capacity was approaching 100 GW. Leading companies in wafers include LONGi Green Energy, TCL Zhonghuan, Shangji Automation, and GCL System Integration. In cells, key players are Junda, Aiko Solar, LONGi, and Tongwei, with Junda and Aiko being TOPCon leaders whose stock prices have performed well recently.
**04. PV Modules: The Power-Generating Panels** PV modules are the most recognizable part of the industry—the solar panels on rooftops or in large farms. They encapsulate and protect the fragile cells from environmental damage and aggregate the electricity generated by multiple cells for conversion by the inverter. Essentially, if a cell is a single generating unit, a module is an assembly of units forming a larger panel, directly determining total power output and system longevity. High-quality modules can last 25-30 years. Technological advances have increased module power, with mainstream products exceeding 600W and premium ones reaching over 700W, lowering the cost of building solar farms and improving efficiency.
Global demand for green power is robust. Domestically, rural and building-integrated installations are rising. Internationally, Europe, the Americas, and Southeast Asia are adding significant capacity, driving demand for modules. Projections suggest global module demand will exceed 300 GW in 2026, a more than 30% year-on-year increase, indicating sustained industry vitality. However, some analysts caution that demand in 2026 might face pressure following a surge in domestic installations in 2025, though the long-term global trend toward green energy remains intact. Chinese companies produce over 80% of the world's PV modules. Firms like LONGi, Jinko Solar, JA Technology, and Trina Solar consistently rank among the global top ten, maintaining strong relationships with project developers worldwide and wielding significant influence. Industry consolidation is expected to further strengthen these major players, with others like Risen Energy also being key representatives.
**05. Inverters: The System's Converter** If modules are the "muscle," inverters are the "brain" or "heart" of a PV system—a highly technical component. Modules generate direct current (DC) electricity, but homes and industries use alternating current (AC). The inverter's core function is to convert DC to AC, while also regulating voltage, controlling power, and enabling grid connection. Without an inverter, solar-generated electricity is unusable. Think of DC power as "raw electricity" and the inverter as the "processing plant" that refines it into standard AC power for consumption or grid injection. Inverters also monitor system performance, quickly identifying faults to ensure stable operation and minimize waste.
The shift toward "PV + storage" and distributed generation (small-scale systems on rooftops) demands more from inverters. They must not only be highly efficient with low losses but also integrate seamlessly with energy storage systems and enable smart control. The dominant inverter technology has evolved from large central inverters to more flexible and efficient string inverters and microinverters, which are ideal for distributed scenarios. Chinese inverter manufacturers are globally dominant, producing over 70% of the world's inverters, with string inverters accounting for more than 80% of that share, thanks to technological and cost advantages. Major companies collaborate with solar projects worldwide, and exports are growing as international installations increase. Leading firms include Sungrow, GoodWe, Ginlong Solis, Sinexcel, and KSTAR. Sungrow, as the industry leader, has seen strong stock performance recently, boosting activity across the inverter sector.
**06. TOPCon: More Efficient Power Generation Technology** TOPCon is not a new component but an advanced cell technology set to be a focal point in 2026, enabling higher cell efficiency. As the core of the module, cell technology directly dictates power generation efficiency and cost. While PERC technology is maturing, TOPCon enhances cell structure to significantly boost efficiency and reduce energy loss, offering a high-performance, cost-effective upgrade path. Simply put, TOPCon cells add tunnel oxide and passivation layers to the PERC structure, acting as a "protective shield" that minimizes energy waste and allows more sunlight absorption. Mainstream TOPCon cells now exceed 26% efficiency, a notable gain over PERC, with comparable production costs, making them highly competitive.
TOPCon technology is now suitable for mass production. 2026 is seen as a pivotal year for its widespread adoption over PERC. Major cell manufacturers are rapidly expanding TOPCon capacity. Estimates suggest global TOPCon capacity will surpass 200 GW in 2026, accounting for over 60% of total cell capacity, creating significant industry opportunities. Within this niche, Junda and Aiko Solar are recognized as TOPCon leaders. It's important to note that TOPCon is a technological evolution within the cell segment; it does not alter the fundamental photovoltaic supply chain logic, which remains: Silicon Material → Wafer → Cell → Module + Inverter. This type of upgrade tends to benefit larger companies with strong R&D and production capabilities, potentially widening the gap between industry leaders and smaller players.
**07. Related ETFs** In summary, the seemingly complex terminology simply describes interconnected segments of the photovoltaic supply chain: silicon material is the foundation; wafers and cells are intermediate components; modules are the panels; inverters are the converters; and TOPCon represents a more efficient technology. Together, they form a complete industrial chain driving the sector forward.
For individual investors seeking exposure to the solar industry, deeply researching individual stocks may be unnecessary. Exchange-Traded Funds (ETFs) offer a potentially more stable alternative. ETFs provide diversified exposure across the entire photovoltaic supply chain, allowing investors to participate in the growth of all segments while mitigating the risk associated with any single stock, thus easily tracking the industry's future development. For example, the ChinaAMC Photovoltaic ETF (515370) and its feeder funds (012885/012886) maintain a 95% exposure to the photovoltaic sector, making it one of the highest-purity index products available. It tracks the CSI Photovoltaic Industry Index, which covers upstream, midstream, and downstream segments, accurately reflecting the industry's overall performance and aligning closely with energy transition and dual-carbon goals.
Note: This article represents the author's views for reference only. Please review product information and risk disclosures below.
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