Introduction
India has witnessed an unprecedented clean energy transition over the last decade, expanding its solar capacity more than 50-fold from 2.82 GW in 2014 to over 150 GW. According to the International Renewable Energy Agency (IRENA), India now ranks as the third-largest solar power producer globally, a milestone that enabled the country to achieve its target of 50% non-fossil generation capacity well ahead of the 2030 deadline.
Key Dimensions of Progress in Solar Energy
India's solar energy trajectory is characterised by scale, price discovery, and policy-driven domestic capacity building:
- Ultra-Mega Solar Parks: World-leading utility projects such as the Bhadla Solar Park (2,245 MW) in Rajasthan and Pavagada Solar Park (2,050 MW) in Karnataka have leveraged economies of scale, bringing competitive solar generation tariffs down to approximately ₹2.5/kWh.
- Decentralised and Rural Solar Initiatives: The PM Surya Ghar: Muft Bijli Yojana aims to deploy rooftop solar across 1 crore households, democratising generation. Simultaneously, the PM-KUSUM scheme promotes the solarisation of agricultural pump sets and feeder lines, mitigating farm power subsidy burdens.
- Strengthening Domestic Manufacturing: The Production Linked Incentive (PLI) scheme for High-Efficiency Solar PV Modules and the Approved List of Models and Manufacturers (ALMM) framework have expanded domestic module manufacturing capacity beyond 100 GW.
Critical Bottlenecks and Challenges
Despite impressive installation metrics, structural challenges threaten long-term energy security and operational stability:
- Upstream Supply Chain Vulnerability: Over 80% of critical upstream components—including polysilicon, ingots, and wafers—continue to be imported, predominantly from China, creating import substitution risks.
- Grid Integration and Intermittency: Solar generation suffers from daily intermittency. The penetration of Battery Energy Storage Systems (BESS) and pumped-storage hydropower remains low due to high capital costs, creating grid stability risks.
- DISCOM Financial Distress: Cash-strapped state distribution companies (DISCOMs) cause chronic payment delays and enforce arbitrary power curtailments, depressing returns and increasing risks for independent power producers.
- Solar Waste Management: Large-scale panel installations require institutionalised recycling protocols under Extended Producer Responsibility (EPR) regulations to address impending end-of-life photovoltaic waste.
Strategic Way Forward
- Backward Integration: Prioritise domestic fabrication of polysilicon and silicon ingots under PLI Phase-II to insulate against geopolitical supply risks.
- Storage Viability Gap Funding: Scale Viability Gap Funding (VGF) for grid-scale BESS and fast-track pumped-storage hydro projects to deliver firm, dispatchable round-the-clock (RTC) green power.
- Transmission Infrastructure: Expedite the Green Energy Corridor transmission network to seamlessly evacuate power from high-irradiance western and southern states to high-demand industrial belts.
Conclusion
India's solar journey demonstrates remarkable regulatory momentum, competitive cost economics, and swift capacity additions. To transition from mere capacity expansion to sustainable energy sovereignty, policy focus must urgently shift toward deep domestic value-chain manufacturing, energy storage integration, and robust grid modernization.