Terra Clean, a subsidiary of Indian Oil Corporation, has invited bids to set up pooling substations and associated power evacuation systems for 400 MW solar power projects in Madhya Pradesh and Gujarat.

The successful bidder will also be responsible for the projects’ operation and maintenance for five years.

The tender covers Group A, a 300 MW (220 kV interstate transmission system) solar project near the Morena pooling station in Sheopur, Madhya Pradesh, and Group B, a 100 MW (66 kV intra-state transmission system) solar project near the Sisrana Gujarat Energy Transmission Corporation substation in Banaskantha, Gujarat.

The scope of work for Group A includes the design, engineering, supply, construction, testing, and commissioning of an interstate transmission system connected to a 220 kV air-insulated switchgear pooling substation and associated 33 kV pooling switchgear for interconnecting 300 MW of solar capacity. It also includes associated civil works, such as the control room building.

For Group B, the scope includes the design, engineering, supply, construction, testing, and commissioning of an intrastate transmission system- connected 66 kV air-insulated switchgear pooling substation and associated 33 kV pooling switchgear for interconnecting 100 MW of solar capacity. It also includes associated civil works, such as the control room building.

The last date to submit bids is June 17, 2026. Bids will be opened on June 18.

The estimated project cost is ₹478.9 million (~$4.99 million) for Group A and ₹287.8 million (~$3 million) for Group B.

Bidders must submit an earnest money deposit of ₹1.19 million (~$12,404) for Group A, ₹720,000 (~$7,505) for Group B, and ₹1.91 million (~$19,910) for both groups. They must also pay a tender fee of ₹5,000 (~$52).

The successful bidder must also furnish a security deposit equivalent to 10% of the contract value. An initial security deposit equivalent to 2.5% of the contract value must be submitted within the prescribed period after the contract or letter of acceptance is issued.

The projects must be completed within 12 months, and bidders must be Class I local suppliers.

Bidders quoting for Group A must have engineered, procured, and constructed at least one electrical substation of at least 220 kV or above and transmission lines of at least 220 kV. The projects must be operational for at least one year if connected to non-renewable energy projects, and for at least six months if connected to renewable energy projects.

Those quoting for group B must have engineered, procured, and constructed at least one electrical substation of at least 66 kV and transmission lines of at least 66 kV. The projects must be operational for at least one year if connected to non-renewable energy projects, and for at least six months if connected to renewable energy projects.

Bidders quoting for Group A must have an annual turnover of at least ₹239.8 million (~$2.5 million) in the last three financial years. Those quoting for Group B must have a minimum annual turnover of ₹145 million (~$1.51 million). Bidders quoting for both groups must have an annual financial turnover of at least ₹384.9 million (~$4.01 million).

Recently, Terra Clean invited bids to aggregate land for an ISTS -connected 100 MW solar project near the Davanagere ISTS pooling substation in Karnataka.

Earlier this year, Terra Clean issued a tender to supply 291 transformers for interstate- or intrastate-connected renewable energy projects at multiple locations.