India’s solar manufacturing boom faces overcapacity and trade hurdles amid rapid growth

India’s rapid build-out of solar manufacturing capacity has transformed it from a predominantly import-dependent market into a global factory floor for modules and cells, but that success is producing familiar teething problems: rising inventories, strained export channels and growing pressure to cut costs.

According to Energies Media, New Delhi has moved to tighten domestic sourcing, with a mandate that from June 2026 any public solar projects must use locally manufactured components. The government has also set an ambition to lift non-fossil power generation from about 186 GW to 500 GW, signalling a long-term policy push behind the industrialisation drive.

Industry data show a breathtaking expansion in capacity. PV Magazine reported that by March 2025 module manufacturing capacity had almost doubled to 74 GW from 38 GW a year earlier, while cell capacity tripled from 9 GW to 25 GW. Government and industry figures recorded a record 25 GW of renewable additions in fiscal 2024–25, a 35% year-on-year rise, with solar accounting for the bulk of the growth and India surpassing 100 GW of installed solar capacity. According to Energies Media, private investment is following the policy steer: Goldi Solar secured a $171 million injection from backers including Havells India to expand manufacturing.

Yet Wood Mackenzie’s analysis raises a cautionary note. The research house projects module manufacturing capacity could exceed 125 GW by 2025, more than three times the domestic market’s roughly 40 GW demand, and reports an inventory build-up of around 29 GW by Q3 2025. “India’s government’s PLI scheme has been highly effective in spurring factory announcements, but the industry is now seeing warning signs of rapid overcapacity similar to those that preceded China’s recent price collapse. The challenge has shifted from building capacity to achieving cost-competitiveness and diversifying export markets,” said Yana Hryshko, Head of Solar Supply Chain Research at Wood Mackenzie, underscoring the shift from capacity creation to market discipline.

The pressure is already visible in trade flows. Wood Mackenzie and Economic Times reporting both note a 52% decline in module exports to the United States in the first half of 2025, a fall linked to new 50% reciprocal tariffs that have made key export markets harder to access. At the same time, Economic Times highlights that many Indian‑assembled modules remain more expensive than Chinese imports, leaving Indian producers squeezed on price.

For industrial decarbonisation professionals, the implications are twofold. First, domestic content rules and Production Linked Incentive (PLI) support have accelerated localisation of a capital‑intensive supply chain, reducing strategic dependence on a single dominant supplier nation. Second, the emerging overcapacity and trade frictions mean policy success on industrialisation does not automatically translate into lower delivered costs for project developers or grid operators.

Market participants are therefore confronting three practical tasks. Manufacturers must drive down manufacturing and balance‑of-system costs to close the gap with established low‑cost supply chains; policymakers must manage the cadence of capacity additions and align incentives to avoid destabilising price competition; and project owners and exporters must secure diversified markets and offtake arrangements to absorb the production pipeline without a damaging price collapse.

Several recent developments point to how those tasks might be tackled. Battery‑integrated solar parks such as the Rajasthan project cited by Energies Media demonstrate system-level innovation that can raise system value beyond module price alone. Investment rounds like Goldi Solar’s $171 million raise show that capital is available to scale and to invest in efficiency gains. And industry commentary suggests firms are already exploring export diversification and vertical integration to buffer tariff shocks.

Ultimately, India’s solar manufacturing surge is a strategic success: policy has mobilised factories, capital and supply chains at an unprecedented pace. But as Wood Mackenzie’s findings and trade data make clear, the hard work now is managing oversupply risk, restoring competitiveness relative to established low‑cost producers, and converting manufacturing scale into reliably lower delivered costs for decarbonisation projects. For decision makers in industry and government, the immediate priority is therefore not celebrating capacity milestones, but coordinating industrial policy, trade strategy and deployment planning so that capacity growth supports, rather than destabilises, India’s energy transition.