Every solar farm has the same quiet enemy. It is not a storm or a faulty inverter. It is dust — a thin, stubborn film that settles on every panel, day after day, and quietly steals the sunlight before it can become electricity. In India’s driest, sunniest regions, where solar power makes the most sense, that dust is at its worst, and washing it away with water is itself a costly, thirsty business.
In Bengaluru, a company called Aegeus Technologies decided the answer was not more water, more ladders or more labour. It was a robot — one that brushes the dust away with air and microfibre, needs no water at all, and works its way across a solar farm on its own while its owners watch from a phone screen.
Aegeus Technologies builds waterless robotic cleaning systems for solar plants, and its robots are now at work across more than 10 GW of solar assets in India, Brazil and the Middle East. The company says its flagship cleaning technology, Airwash, cleans with 99.84% efficiency, tested at UL Labs — and it does it without a single drop of water.
Dust is the silent tax on solar power
A solar panel is only as good as the light that reaches it. Dust, bird droppings and grime form a barrier between the sun and the cell, and output falls. Traditionally, keeping a utility-scale plant clean has meant crews, tankers and thousands of litres of water — in precisely the arid places where water is scarcest and solar is most valuable.
Aegeus was founded in 2017 by Suraj Vernekar and Nishith Shah with a single conviction: that protecting solar assets and conserving water belong in the same machine. The company designs, develops and manufactures its robots in India, and describes its range as 100% Made in India robotic technology for solar panel cleaning.
Unicorn for the big farms, Shreem for the rooftops
The company’s flagship is Unicorn, built for ground-mounted solar farms. Unicorn is a smart, self-charging robot that travels along the panel rows, sensing dust levels and cleaning accordingly. The company says it can tell dust apart from bird droppings or panel breakage, and sends an alert to a central monitoring station or a designated mobile phone over GPRS whenever manual intervention is needed. Unicorn cleans 400 to 800 panels an hour depending on dust levels, runs on lithium-ion batteries charged by its own small solar panel, and can operate for four to six hours on a charge before returning to its docking station.
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For rooftops, there is Shreem — a fully autonomous cleaning bot that weighs just 5 kg with its batteries, light enough to carry in a backpack to hard-to-reach roofs. Shreem can be operated through a web-based app from anywhere, or by Bluetooth, a mobile app or an RF remote controller, and can be preset to start at a chosen time of day. The company says Shreem cleans around 200 panels an hour, and its solar-powered docking station watches the weather, keeping the robot safely docked when rain or wind make cleaning unwise.
Airwash: brushes, airflow and a brain
Both robots run on the company’s patented Airwash technology. Instead of water, Airwash uses microfibre brushes — a rotary brush coupled with a blower and auxiliary brushes on Unicorn, and axial and radial microfibre brush sets on Shreem — with controlled airflow blowing the loosened dust away. Nothing wet touches the panel, no chemicals are involved, and the brushes are self-cleaning, ready for the next row immediately.
The intelligence sits on top of the brushes. Unicorn’s machine-learning system adjusts to dust levels, follows a schedule or switches to automatic mode, and can be parked remotely in maintenance mode so plant crews can work without a robot in the way. Shreem’s sensors detect panel edges, follow straight paths across undulating surfaces, and learn the layout of each installation — rows, columns, module angles and direction — so every clean is planned, not improvised. The company says its Airwash technology is patented in India, Australia, China, Saudi Arabia and the USA.
From a cleaning robot to a full plant-care platform
Aegeus is growing beyond cleaning into the whole job of looking after a solar plant. Its ecosystem now includes Asset Guard, an on-ground surveillance and inspection robot with cameras, thermal imaging, LiDAR and RTK GPS; GreenSweep for vegetation management around panel arrays; AEG Shield for plant security; and Aegeus Connect, an IoT platform that lets operators monitor and control their assets remotely. Alongside the hardware, the company offers Module Cleaning as a Service and annual maintenance contracts, turning a robot sale into a long-term performance partnership.
That shift — from hardware vendor to performance partner — is the company’s stated ambition, and the deployments are following it. From its Bengaluru base and two manufacturing facilities, Aegeus has expanded across India and into Brazil and the Middle East, and has set up a wholly owned subsidiary in Saudi Arabia, where the company says it is managing solar sites at NEOM NRC.
A Bengaluru company going global — and public
August 2026 marked a new chapter for the company. Aegeus Technologies came to the capital markets with a BSE SME public issue of 22,58,400 fresh equity shares at a price band of ₹100 to ₹105, aggregating up to ₹23.71 crore, with the public issue open from 4 to 6 August 2026 and listing on 11 August 2026. The company says it will use the proceeds for product development, a new manufacturing facility, working capital and general corporate purposes — the next step in scaling a Made-in-India robotics platform for the world’s solar boom.
It is a fitting milestone for a company built on a simple, elegant idea: that the cleanest way to keep the world’s cleanest energy working is to use no water at all. As India’s solar fleet grows, and as solar spreads deeper into dusty, water-stressed regions, robots like Unicorn and Shreem are quietly becoming part of the infrastructure — small orange machines, moving row by row, keeping the sunlight coming in.
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