India’s solar industry faces a test of durability and cost

As per the Ministry of New and Renewable Energy, India’s installed solar capacity reached 171.05 GW on 30 September 2026. As the country continues to scale its clean energy infrastructure, the next challenge will be to ensure that this capacity provides reliable power for decades to come. The industry’s success will gradually depend not just on how quickly solar projects are built, but on the quality of the assets being installed.

For developers and investors, durability has direct financial implications. Since solar PV installations are generally designed to operate for 25 years, long-term reliability and warranty coverage are essential. Ensuring that modules are manufactured at the facilities declared by producers is equally important for verifying product authenticity, protecting consumer interests and safeguarding India’s energy security. While lower purchase prices can improve initial project economics, consistent quality and dependable performance remain critical to protecting returns over a plant’s operating life

Real costs

A module’s purchase price represents only one part of its overall cost. Its long-term performance affects power generation, project income, and ROI. Over the lifetime of a solar power plant, cumulative generation can be impacted by slight variations in annual degradation, or a slow reduction in power output.

Indian installations face diverse conditions, from intense summer heat and dust to humidity, heavy rainfall and strong winds. These constantly apply pressure on the glass, encapsulants, frames and electrical connections of the modules. If manufacturing processes or materials are modified to cut costs, failures may not appear for years after installation when repairs and replacements can be more expensive.

Recent industry reporting has highlighted concerns about the mechanical durability of solar modules. In the second quarter of 2025, mechanical stress sequence testing detected glass breakage in around one-third of the modules that were tested. Even though these laboratory results did not represent failure rates across the wider market, they did stress upon structural reliability. Thinner glass, bigger module formats and minimized safety margins could increase durability risks, making material quality and component compatibility central considerations along with efficiency ratings.

Production quality

The life of a module is affected by many elements such as the quality of the manufacturing, how it is transported, installed and used. But production is where the basis for long-term reliability is built. Consistent raw material quality, controlled lamination, reliable sealing and meticulous assembly provide structural integrity. Thus, quality control must be applied during the making process and not just at final inspection.

High production standards can go hand-in-hand with competitive price. Manufacturers can control costs without sacrificing product quality by increasing production yields, minimizing waste of materials, automating key operations and tightening supplier audits. Traceability also helps to identify defects before products reach customers.

India’s regulatory system is a crucial basis for quality assurance. The Ministry of New and Renewable Energy’s Approved List of Models and Manufacturers (ALMM) specifies approved models and manufacturers for certain project categories. Applicable quality control criteria also help in conformity to Indian Standards. Compliance, however, is simply the beginning. Independent testing, documented quality checks and unambiguous certification records help to establish product reliability. Developers should evaluate long-term project risks by considering test reports, supplier credentials, warranty conditions and traceability.

Efficiency and reliability

The adoption of advanced cell technologies such as n-type tunnel oxide passivated contact (TOPCon), is also adding another aspect to module selection. The higher conversion efficiency implies that more power can be generated from a given area, making the technology suited for large solar parks and installations where space is at a premium. It may also have benefits on temperature performance and degradation rates depending on the module design.

However, higher efficiency at the time of purchase does not automatically translate into effective long-term returns. The extended value of TOPCon technology depends on how well a module maintains its power output over time. Developers should thus measure the expected energy yield and degradation alongside initial power ratings when estimating a project’s economics.

For manufacturers, that means looking at technology not just for what the output will be when it’s new, but what value it can maintain over time. Improvements in cell architecture must translate into dependable generation under real operating conditions. Ultimately, efficiency creates lasting value when it helps a solar plant maintain higher energy output with consistent performance.

As India’s solar industry matures, manufacturing competitiveness will depend on consistent quality, sustained energy generation and competitive lifecycle costs, not just capacity additions and module prices.

India’s Panchamrit commitments which include 500 GW of non-fossil fuel-based energy capacity by 2030 and net-zero emissions by 2070, point to the extent of its clean-energy ambitions. Simultaneously, the PM Surya Ghar: Muft Bijli Yojana is supporting wider rooftop solar adoption.  Meeting these aspirations demand durable solar assets that keep performance losses down, manage maintenance costs and offer reliable power for decades. Long-term durability will be essential to making solar energy affordable and reliable.