Polysilicon Glut and Silicon-Metal Demand Outlook 2026
May 2026
TL;DR
China's polysilicon prices crashed approximately 60% from late 2023 to mid-2025, falling from ~RMB 200,000/tonne to under RMB 80,000/tonne. The collapse stems from massive Chinese capacity additions (Tier-1 producers including Tongwei, GCL, Daqo, Asia Silicon, ChinaPlus, Yongxiang and others) that have created 600+ kt/year of overcapacity vs. polysilicon-equivalent PV demand. The implications for upstream silicon-metal demand are sobering: a Chinese silicon-metal demand reduction of 800-1200 kt/year through 2026, only partially offset by silicone monomer growth. Silicon-metal pricing has compressed to 4-year lows, hurting marginal Chinese producers and pressuring the entry economics for Indonesian newcomers (see Indonesian smelter ramp).
Background — How Polysilicon Connects to Silicon Metal
The polysilicon supply chain begins with metallurgical-grade silicon (silicon metal), which gets converted to trichlorosilane (SiHCl₃ or TCS) and then to polysilicon via the Siemens process. About 1.1-1.3 kg of silicon metal produces 1 kg of polysilicon. China's polysilicon demand for the PV industry consumed approximately 1.5 million tonnes of silicon metal annually at peak (2023).
The Chinese silicone industry consumes silicon metal differently: silicon metal feeds silicone monomer production at approximately 0.8-0.9 kg silicon metal per 1 kg of silicone monomer. China's silicone monomer demand consumes approximately 1.0-1.2 million tonnes of silicon metal annually.
So China's polysilicon consumption represented 50-60% of total silicon metal demand at peak. When polysilicon collapses, silicon-metal demand contracts significantly.
What Happened to Polysilicon
The 2024-2025 polysilicon collapse had three drivers:
Massive capacity additions: China's polysilicon capacity grew from ~700 kt/year (2022) to 1,400+ kt/year (2024) — driven by aggressive expansion at Tongwei, GCL, Daqo, Asia Silicon, and others. The expansion was based on assumed 30%+ annual PV installation growth.
PV installation growth slowdown: Global PV installations grew 30% in 2023 but only 15-20% in 2024 and projected slower for 2025. China's domestic PV installation growth particularly slowed as utility-scale projects deployed at slower pace than expected.
Inventory build-up: As capacity expansion outran demand, polysilicon inventory at Chinese plants reached 6-9 months in some cases by mid-2024 — far above the 1-2 month typical operating level.
The combination caused price collapse from RMB 200,000+/tonne (late 2023) to under RMB 80,000/tonne by mid-2025.
Implications for Silicon Metal Demand
Reduced polysilicon production means reduced silicon-metal consumption:
| Year | Polysilicon Output (kt) | Silicon Metal for Polysilicon (kt) | Total Silicon Metal Demand (kt) |
|---|---|---|---|
| 2022 | ~720 | ~870 | ~3,800 |
| 2023 | ~1,000 | ~1,200 | ~4,200 |
| 2024 | ~1,200 | ~1,440 | ~4,500 |
| 2025 (est) | ~1,200 | ~1,440 | ~4,500 |
| 2026 (forecast) | ~1,100-1,300 | ~1,300-1,560 | ~4,300-4,700 |
If 2026 polysilicon output stays flat (or declines on capacity rationalization), silicon-metal demand stays compressed.
Implications for Silicone Monomer
For silicone-monomer producers, the polysilicon collapse is mixed:
Negative: silicone-monomer producers operating in the same regions as polysilicon producers face shared cost pressures (energy, silicon-metal feedstock).
Positive: weaker silicon-metal pricing reduces silicone-monomer producers' raw-material cost. Margin compression at silicon-metal smelters partially flows through to silicone monomer profit margins (although competitive pressure caps how much benefit silicone monomer producers can capture).
Net: silicone monomer producers in 2026 see modest margin expansion vs 2024, primarily from cheaper silicon metal. Silicon-metal producers see compressed margins.
Implications for the Silicon Metal Industry
Silicon-metal producers face a difficult market:
Pricing: Silicon-metal price compressed from $2,500/tonne (2023 peak) to $1,800-2,000/tonne (2025 levels). Marginal producers (smaller, less integrated, higher energy cost) operate at thin margins or losses.
Capacity rationalization: Chinese silicon-metal smelting policy is shifting toward energy-efficiency mandates. Smaller smelters with high energy intensity face closure pressure.
Indonesian competition: Indonesian silicon-metal capacity (200-400 kt/year through 2027) enters a market already weakened by polysilicon collapse, intensifying competition.
Polysilicon recovery uncertainty: Industry expects polysilicon prices to recover only partially, with some structural overcapacity persisting through 2026-2027. Silicon-metal demand recovery depends on PV installation growth and on China's polysilicon capacity rationalization.
Outlook
Through 2027, expect:
Polysilicon: Price recovery to RMB 100,000-150,000/tonne range as some Chinese capacity rationalizes. Full recovery to 2023 peaks unlikely.
Silicon metal demand: 4,400-4,800 kt/year for China (vs 5,000+ peak), with Indonesian additions partly compensating.
Silicon metal price: $1,800-2,200/tonne range for 553 grade, with periodic spikes from supply disruption.
Silicone monomer: stable supply, modest margin improvement vs 2023-2024 trough.
Vertical integrators: Companies with both silicon-metal smelters and downstream consumption (silicone, polysilicon) outperform pure silicon-metal smelters.
Strategic Implications
For silicon-metal buyers:
- Volatility increases — polysilicon collapse creates abnormal pricing dynamics
- Long-term contracts with established Chinese suppliers preferred over spot
- Quality differentiation matters less when capacity is abundant — focus on logistics and reliability
For polysilicon-related procurement:
- Polysilicon spot pricing extremely volatile
- 6-12 month contracts make sense; longer contracts not advisable
- Recovery timing uncertain; budget for both lower-price and higher-price scenarios
For silicone procurement:
- Silicone monomer cost relief from cheap silicon metal flows through partially to silicone prices
- Procurement should not assume permanently low silicon-metal cost; PV recovery would reverse this
Related Reading
China silicone consolidation for the related Chinese supply context. Indonesian silicon-metal smelter ramp for new capacity. Silicon metal category for grade specifications. Photovoltaic industry guide for downstream context.