NTPC Vidyut Vyapar Nigam (NVVN) has invited bids to develop 4.73 MW grid-connected rooftop solar systems at various locations under the Bhakra Beas Management Board (BBMB).

The last date to submit the bids is November 12, 2024. Bids will be opened on November 13.

Bidders must pay a bid security of ₹2 million (~$23,789).

The successful bidders will be responsible for the design, engineering, supply, civil construction, erection, testing, and commissioning of the rooftop solar systems, connecting to existing mains/ACDB/feeder pillars and interfacing internal electrical loads of the project’s license’s network/electrical loads.

They must also perform a preliminary visual assessment of the roof, arrange for water and electricity, determine the optimal capacity for installing solar systems, and operate and maintain the rooftop solar systems for five years which can be extended for another five years at the discretion of NVVN.

The modules and inverters/PCU must be purchased from Class-I suppliers. Solar modules with a minimum capacity of 540 Wp must be used, and their yearly degradation factor must be less than 0.7%.

The modules must be warranted for their output peak watt capacity, which should be at least 90% at the end of ten years and 80% at the end of 25 years.

Only Class-I and Class-II local suppliers can participate in this tender.

Before submitting bids, bidders are advised to visit the site and collect the information required to install the solar systems.

NVVN recently invited bids to develop 3.92 MW of rooftop and 2.4 MW of ground-mounted solar power projects at NTPC stations Simhadri and Ramagundam in Andhra Pradesh and Telangana.

In September, it issued tenders to select and discover the lowest rates for rate contracts for the engineering, procurement, and construction of grid-connected rooftop solar systems of various capacities on government and private buildings. Successful bidders must operate and maintain the rooftop solar systems for ten years.