Sol-Bright bets on service and localization as India’s solar cleaning market expands

For utility-scale solar projects in India, module cleaning is not a minor maintenance task. It is directly linked to generation, revenue and asset performance. Dust, high temperatures, water constraints and large project sizes make cleaning strategy a core part of plant operation. For Sol-Bright New Energy, this has created a strong market for water-free robotic cleaning systems — but also a market where hardware alone is not enough.

Speaking during SNEC 2026 in Shanghai, Priya, India business representative of Sol-Bright New Energy, said the company’s growth in India has been built on three foundations: long-term operating experience, strong service infrastructure and project-specific customization. Sol-Bright presents itself as one of the early developers of robotic PV module cleaning technology and says it has supplied solutions to more than 36 countries. According to Priya, the company has delivered cleaning systems for more than 55 GW of solar projects globally.

India is one of the company’s most important overseas markets. Priya said Sol-Bright began operating in India around 2013 and has accumulated roughly 13years of local supply and operating experience. In a market where solar parks are large, environmental conditions vary sharply and project uptime is closely tied to financial returns, that field experience has become a major part of the company’s value proposition.

The first differentiator, she said, is service infrastructure. Sol-Bright has built four dedicated warehouses in India, including two in Rajasthan, with the aim of keeping most project sites within roughly 300 km of a spare-parts supply point. The company says this allows it to respond faster when parts are needed and helps reduce turnaround time for maintenance.

That matters because cleaning robots are moving components inside solar projects. Unlike modules or fixed mounting systems, robots operate regularly and require maintenance support. They typically work after solar generation hours, often in the evening after sunset, when cleaning can take place without interrupting daytime generation. For large projects, even limited downtime can affect cleaning schedules and, ultimately, plant output.

Priya said Sol-Bright has more than 500 service engineers or service personnel supporting the Indian market. For projects with more than 100 robots, the company deploys dedicated technicians and keeps spare parts on site. Its goal is to achieve turnaround times of less than 24 hours in case of robot downtime and to maintain availability above 99% or 99.5%, although the exact service-level commitment should be confirmed.

The second pillar of Sol-Bright’s India strategy is customization. Priya emphasized that the company does not try to sell one standard robot into every project. Instead, its technical team studies each site before proposing a solution. Factors such as plant layout, topography, environmental conditions, weather patterns, temperature, tracker type and module configuration all affect system design.

This is especially important in India, where project conditions differ widely by region. Rajasthan’s desert environment, for example, has different cleaning challenges from sites in more humid or mixed-climate regions. Projects may use fixed-tilt structures, trackers or different module formats. A robotic cleaning system must therefore fit the plant architecture, not the other way around.

The third factor is performance. Priya framed robotic cleaning not only as a water-saving tool, but also as a revenue-enhancing system. She said Sol-Bright’s dry-cleaning solution can keep soiling losses below 0.5% in some cases and may deliver at least 20% more energy generation compared with traditional water cleaning. These performance claims require technical verification before publication, but they show how the company wants customers to evaluate the product: not as an operating cost, but as a way to protect and improve energy yield.

For investors, even small generation gains can be meaningful. In utility-scale solar projects, a 1% or 2% performance difference can translate directly into revenue over a plant’s lifetime. This is one reason robotic cleaning is gaining attention in large projects, particularly where water availability, labor management or cleaning consistency are concerns.

India’s climate also shapes product requirements. Summer temperatures in parts of the country can approach 49°C or 50°C. Priya said Sol-Bright’s robots have been tested to operate from -22°C to +65°C, giving them a margin above the highest temperatures normally seen in India. In practice, she noted, robots usually operate after sunset, when temperatures have already fallen from daily peaks. But high-temperature capability remains important for reliability and customer confidence.

Sol-Bright’s customer base in India is mainly utility-scale. Priya said the company’s solutions are best suited to large projects, typically above 50 MW. She also named a number of major Indian developers and EPCs, including NTPC, Sterling and Wilson, Adani, ReNew, Rays Power Infra, CleanMax and Mahindra Susten, although the exact customer relationships should be verified before publication.

The company’s focus on large projects reflects the economics of robotic cleaning. Large solar plants have enough scale to justify automation, enough operating complexity to benefit from structured service, and enough generation volume for small yield improvements to matter. Smaller rooftops or distributed systems may have different cleaning economics, but utility-scale plants provide a clearer business case.

The company’s strategy therefore goes beyond selling cleaning robots. It is trying to build an operating ecosystem around robotic cleaning: warehouses, spare parts, field engineers, project design, performance data and eventually local manufacturing. In a market as large and demanding as India, that ecosystem may be more important than the robot itself.

Priya’s message at SNEC 2026 was clear. For Sol-Bright, India is not simply an export destination. It is a priority market where robotic cleaning must be localized O&M, serviced and customized at scale. If the company can turn its early-mover experience into deeper manufacturing and service capability, it could strengthen its role in one of the world’s most important utility-scale solar markets.