Manufacturing a single solar panel costs roughly $0.15 to $0.27 per watt, depending on where it’s made. For a standard 400-watt residential panel, that translates to about $60 in China and up to $110 in the United States or Europe. These figures represent the full cost of turning raw silicon into a finished module, and the gap between regions is one of the biggest stories in the solar industry right now.
Full Module Cost by Region
A joint analysis by Fraunhofer ISE and the U.S. National Renewable Energy Laboratory broke down 2024 manufacturing costs for a mainstream TOPCon solar module produced entirely within each region. The results, measured in euro cents per watt, show a striking spread:
- China: 14.6 €ct/Wp (roughly $0.16/watt)
- Southeast Asia: 15.0 €ct/Wp (roughly $0.16/watt)
- India: 17.0 €ct/Wp (roughly $0.18/watt)
- Europe: 24.1 €ct/Wp (roughly $0.26/watt)
- United States: 27.4 €ct/Wp (roughly $0.30/watt)
That means a panel made entirely in the U.S. costs about 70% more to manufacture than the same panel made in China. Europe runs about 65% higher. These aren’t small margins. On a utility-scale solar farm with hundreds of thousands of panels, even a one-cent-per-watt difference adds up to millions of dollars.
What Makes Up That Cost
A solar panel moves through four major production stages, each adding cost. The Fraunhofer/NREL data traces each step for a Chinese-manufactured TOPCon module:
First, purified polysilicon is produced from raw quartz. This stage costs about 1.4 euro cents per watt in China. Polysilicon spot prices have dropped sharply over recent years, falling to around $7 per kilogram as of early 2026, down from peaks above $40/kg. Since each watt of solar capacity requires roughly 14 grams of silicon, the raw material itself is now a small fraction of total module cost.
Next, the polysilicon is melted and grown into large crystal ingots, then sliced into paper-thin wafers. This ingot-and-wafer stage adds about 3.2 euro cents per watt in China, making it the second most expensive step. The precision required to cut wafers under 200 micrometers thick without cracking them demands specialized equipment and careful process control.
The wafers then become solar cells through a series of chemical treatments and coating steps that create the electrical junctions converting sunlight to electricity. Cell processing adds another 3.6 euro cents per watt. Finally, the cells are wired together, laminated under glass, framed, and tested as a finished module. This assembly stage adds about 6.4 euro cents per watt, covering glass, backsheet material, aluminum framing, junction boxes, and labor.
Why the U.S. and Europe Cost So Much More
The cost gap isn’t explained by any single factor. Higher electricity prices, higher wages, more expensive land, and smaller production scale all contribute. But the biggest driver is simply that China has spent over a decade building an enormous, deeply integrated supply chain where polysilicon producers, wafer makers, cell manufacturers, and module assemblers often operate within the same industrial parks, sharing infrastructure and logistics.
In the U.S., the ingot-and-wafer stage alone costs 7.8 euro cents per watt, nearly double China’s 4.6 cents. Cell manufacturing hits 13.8 cents versus China’s 8.2 cents. These gaps compound at each step. By the time you reach a finished module, the U.S. cost is 27.4 euro cents per watt compared to China’s 14.6. Europe falls between the two at 24.1 cents, benefiting from slightly lower energy costs than the U.S. for some production stages but facing similar labor and scale disadvantages.
Southeast Asian factories, many of them Chinese-owned, produce at costs only about 7% above China’s domestic pricing. India sits about 11% higher, with competitive labor costs but less mature supply chains for specialty materials like silver paste and encapsulant films.
How Panel Technology Affects Price
The numbers above all apply to TOPCon panels, which have become the dominant technology in new production lines. TOPCon succeeded the older PERC design because manufacturers could retrofit existing PERC factories with relatively modest investment, keeping capital costs low while boosting cell efficiency by one to two percentage points.
Heterojunction (HJT) panels represent a more advanced alternative that performs especially well in hot climates and low-light conditions. But HJT requires entirely new production lines using vacuum deposition equipment, and the cells historically use more silver paste for electrical contacts. These factors keep HJT module costs noticeably above TOPCon. For cost-sensitive projects, particularly large utility installations, even a penny-per-watt difference makes TOPCon the default choice.
The technology landscape shifts quickly, though. Busbarless cell designs and thinner silver lines are gradually reducing HJT’s material cost penalty, and some manufacturers are already producing HJT at volumes that bring costs closer to TOPCon.
The Difference Between Manufacturing Cost and Retail Price
What it costs to manufacture a panel and what you pay for one are very different numbers. A panel that costs $60 to produce in China might sell wholesale for $80 to $100, covering the manufacturer’s margin, shipping, insurance, and import duties. By the time it reaches a U.S. homeowner as part of an installed system, the panel itself might account for only 25% to 30% of the total project cost. Inverters, racking, wiring, permitting, labor, and installer margins make up the rest.
Tariffs further complicate the picture. The U.S. imposes various duties on solar cells and modules imported from China and Southeast Asia, which can add 15% to 50% or more to the landed cost. These trade policies are one reason U.S. domestic manufacturing is expanding despite higher production costs: tariffs can close or even reverse the price gap for panels sold within the American market.
How Costs Have Changed Over Time
The decline in solar manufacturing costs over the past two decades is one of the steepest learning curves of any energy technology. In 2003, the average wholesale module price was $3.10 per watt, with polysilicon alone contributing about $0.39 per watt. Today, entire finished modules are manufactured for a fraction of that old silicon-only cost. Polysilicon prices have fallen from $28 to $43 per kilogram in that era to around $7 per kilogram now, while the amount of silicon needed per watt has also dropped through thinner wafers and more efficient cells.
The solar industry has historically followed a roughly 24% learning rate, meaning every doubling of cumulative global production brings module costs down by about a quarter. With global manufacturing capacity now exceeding 1,000 gigawatts per year, further doublings take longer. But incremental gains from thinner wafers, less silver per cell, higher cell efficiencies, and larger module formats continue to push costs lower each year.