Prostarm Info Systems has won South Eastern Railway’s auction to set up 2.059 MW rooftop solar systems under the Santragachi division in Howrah, West Bengal.

Prostarm won the project at a contract value of ₹134.3 million (~$1.48 million).

The tender was floated in November 2025.

The scope of work includes the design, supply, erection, testing, and commissioning of rooftop on-grid solar systems with capacities ranging from 1 kW to 50 kW across multiple sites.

Each system will include solar modules, inverters, balance-of-system components, and mounting structures.

It also covers a five-year comprehensive maintenance contract.

Prostarm must complete the project within 12 months from the date of the letter of award.

The company has executed and commissioned rooftop solar projects totalling 7.35 MW across over 100 sites in the last three financial years.

In 2018, the company expanded its operations into the engineering, procurement, and construction segment, specifically focusing on installing rooftop solar systems..

Last year, Prostarm announced it was establishing a 1.2 GWh battery energy storage system manufacturing plant at the Reliance Model Economic Township in Jhajjar, Haryana, at a cost of ₹250 million (~$2.9 million).

According to Mercom India’s Q3 2025 India Rooftop Solar Market Report, India added 4.9 GW of rooftop solar capacity in the first nine months (9M) of the calendar year 2025, compared to 1.9 GW in the previous year, a 161% year-over-year increase.

In 2024, South Eastern Railway invited bids to empanel agencies to set up 8.38 MW of grid-connected rooftop solar projects in Odisha, Jharkhand, and West Bengal through public-private partnerships on a design, build, finance, operate, and transfer basis.

In the same year, the Asansol Division of Eastern Railway in West Bengal invited bids from solar developers to install 1 MW grid-connected rooftop solar projects on a design, build, finance, operate, and transfer basis.