Terra Clean, a wholly owned subsidiary of Indian Oil Corporation, has issued a tender for the supply of 291 transformers for interstate or intrastate-connected renewable energy projects at multiple locations.

The delivery will include 18 power transformers, 147 auxiliary transformers, and 126 solar inverter-duty transformers, categorized into groups A, B, and C, respectively.

Bidders can quote for one, two, or all three groups.

Bids must be submitted by March 30, 2026. Bids will be opened on March 31.

Bidders must furnish an earnest money deposit of ₹3.74 million (~$40742.78) for the Group A transformer, ₹54,000 (~$587.17) for the Group B transformer, and ₹2.18 million (~$23,736.72) for the Group C transformer orders. They must furnish a tender fee of ₹5,000 (~$54.37).

Selected bidders must submit a performance guarantee of 5% of the total order value.

The estimated value of the Group A order is ₹2.49 billion (~$27.15 million), ₹42.98 million (~$467,396.17) for the Group B order, and ₹1.74 billion (~$19 million) for the Group C order.

The scope of work entails the design, manufacture, erection, testing, and commissioning of the transformers. It also involves providing operation and maintenance services.

Successful bidders must supervise the project site and provide insurance for the transformers. They must provide a repair/replace guarantee for defective equipment of 12 months after the transformers are commissioned, or 18 months from the delivery date, whichever is earlier.

The transformers must have a minimum five-year warranty against material, manufacturing, and workmanship defects.

Group A transformers rated over 100 MVA must be delivered within 14 months. Such transformers with a sub-100 MVA rating must be delivered within 12 months.

Group B transformers rated at 100 kVA and above must be delivered within six months. Such transformers with a sub-50 kVA rating must be delivered within four months.

Group C transformers of all ratings must be delivered between six and eight months, depending on the order quantity.

Delay in supply and site work will attract penalties of 0.5% of the total order value per week, capped at 5%.

Only Class – I local suppliers can participate in the tender.

Bidders must be original equipment manufacturers of transformers with manufacturing facilities.

Bidders must have manufactured and supplied power transformers of at least 100 MVA with 220/33 kV voltage ratings, auxiliary transformers of at least 150 kVA with 33/0.433 kV ratings, and Solar inverter duty transformers of at least 12.5 MVA with 33/(0.63 0.8) kV ratings in the last five years.

Bidders must have executed one of the following orders:

• One order with a value of at least ₹374.6 million (~$4.07 million) for Group A, ₹5.4 million (~$58,716.58) for Group B, and ₹218.3 million (~$2.37 million) for Group C transformers
• Two orders, each with a minimum value of ₹299.7 million (~$3.26 million) for Group A, ₹4.3 million (~$46,755.79) for Group B, and ₹174.6 million (~$2 million) for Group C transformers
• Three orders, each with a minimum value of ₹224.8 million (~$2.44 million) for Group A, ₹3.2 million (~$34,795.01) for Group B, and ₹131 million (~$1.42 million) for Group C transformers.

Bidders applying for the Group A orders must have an annual turnover of ₹449.5 million (~$5 million) in any of the three preceding financial years. Those applying for Group B and C must have an annual turnover of ₹6.4 million (~$69,590) and ₹261.9 million (~$3 million), respectively, during the same period.

Last December, Terra Clean issued a request for proposal for land aggregation to develop a 300 MW intrastate transmission system (InSTS)-connected solar project in Gujarat.

In September, Terra Clean invited bids to aggregate land for 100 MW InSTS-connected solar power projects in Banaskantha, Gujarat.