The Ministry of Railways has invited bids to set up 1,733 kW grid-connected rooftop solar projects on its service and residential buildings at the Goshala and Nambari areas in Guwahati, Assam.

The projects’ expected cost/advertised value is ₹106.85 million (~$1.2 million).

Bids must be submitted by October 28, 2025. Bids will be opened on the same day.

Bidders must submit an earnest money deposit of ₹684,300 (~$7,706.47).

Selected bidders must submit a performance guarantee of 5% of the original contract value.

The scope of work entails the design, supply, installation, testing, and commissioning of the solar projects. It also involves annual and comprehensive services for five years.

The solar projects will utilize two sets of modules, with capacities ranging from 10 kW to 100 kW and 100 kW to 500 kW.

The modules must use Mono PERC crystalline solar cell models approved by the Ministry of New and Renewable Energy.

Selected bidders must install steel structures for the solar systems’ additional mounting arrangement. They must also set up a 50 mm wide and 3 m long earthing set of galvanized iron (GI) of Class A quality with a 40×6 mm GI strip for the earth mat.

Successful bidders must install floor/pedestal-mounted indoor-type modular single-door enclosures. They must also install a spike lightning arrestor with a copper metal rod with a minimum of 25.2 mm diameter and 1445 mm length, with five spikes and a base plate of 8.5×8.5 cm.

For installations in the residential area, selected bidders must install high-quality, durable aluminum roofing sheets.

The projects must be completed within 180 days.

Bidders must have a minimum average annual contractual turnover of V/N or V, whichever is less, over the last three financial years. Here, V stands for the tender’s value, and N stands for the completion period in years.

Bidders must have completed or substantially completed any of the following works during the last seven years:

• Three similar works, each costing at least 30% of the tender’s advertised value
• Two similar works, each costing at least 40% of the tender’s advertised value
• One similar work, costing at least 60% of the tender’s advertised value

Recently, Northeast Frontier Railway floated two tenders for setting up 5 MW of ground-mounted solar projects in Alipurduar, West Bengal, under a public-private partnership.

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