Tata Power approves Rs 11,871 crore Shirwata project

The Tata Power Company Limited approved a Rs 11,871 crore investment for a 1,800-megawatt (MW) pumped-storage project at Shirwata, Maharashtra, disclosed on November 11, 2026. Tata Power plans to add the capacity within 51 months, using a funding mix of 75% debt and 25% equity for renewable-energy round-the-clock applications and energy shifting.

What did Tata Power approve for Shirwata?

Tata Power approved investment in a 1,800 MW pumped-storage project, or PSP, at Shirwata in Maharashtra. The board approval, disclosed on November 11, 2026, sets the required investment at Rs 11,871 crore and gives a 51-month period for the proposed capacity to be added.

The filing identifies the asset as a pumped-storage hydro project rather than a conventional generation expansion. Tata Power said the 1,800 MW PSP is intended to support renewable-energy round-the-clock, or RE-RTC, applications and energy shifting. The announcement does not provide a project commissioning date, a phased capacity schedule, customer arrangements or a project-level revenue estimate.

The disclosure was made under Regulation 30 of the Securities and Exchange Board of India’s Listing Obligations and Disclosure Requirements Regulations, 2015. It records a board-approved investment decision, while providing no indication that any of the 1,800 MW has been commissioned as of the November 11, 2026 announcement.

How large is the Shirwata project compared with Tata Power’s capacity?

The proposed 1,800 MW Shirwata PSP equals 1.8 gigawatts (GW), compared with Tata Power’s disclosed overall existing capacity of 16.9 GW. The proposed addition is therefore 1.8 GW against the existing 16.9 GW base, and Tata Power described utilisation of that existing capacity as being at an optimum level.

The 18.7 GW figure is an arithmetic combination of the disclosed 16.9 GW capacity and the proposed 1.8 GW addition, not a separate Tata Power target. It shows a planned increase of 1.8 GW if the full project is added to the stated capacity base. The filing does not split the 16.9 GW existing capacity by fuel type, asset, location or operating status.

The comparison also distinguishes the project’s scale from its purpose. Tata Power has disclosed an addition measured in MW, but has not disclosed the storage volume, annual energy output, operating hours or renewable capacity that the Shirwata PSP could support.

When will Tata Power add Shirwata pumped-storage capacity?

Tata Power has stated that the proposed 1,800 MW capacity is to be added within 51 months. This is the only implementation period provided in the November 11, 2026 announcement, and the company did not specify a calendar commissioning month or commercial-operation date.

The 51-month disclosure concerns the period for capacity addition, rather than a financial reporting period or evidence of current operations. Tata Power did not disclose interim construction milestones, the date from which the period is measured, or whether the 1,800 MW project will be developed and commissioned in separate units.

The filing also does not disclose the project’s construction status at the time of board approval. As a result, the announced timeline establishes Tata Power’s planned capacity-addition period but does not establish the timing of land development, civil works, equipment installation or individual generating-unit commissioning.

How will Tata Power finance the Shirwata project?

Tata Power said the Rs 11,871 crore Shirwata investment will be financed through 75% debt and 25% equity. Applying those disclosed proportions to the board-approved cost implies Rs 8,903.25 crore of debt and Rs 2,967.75 crore of equity.

The debt and equity amounts are calculations based on Tata Power’s stated 75:25 financing mix and Rs 11,871 crore investment requirement. The announcement does not identify lenders, borrowing rates, repayment terms, equity contributors or the timing of funding deployment during the 51-month capacity-addition period.

Tata Power also did not state whether the debt facilities have been committed. The disclosed mix therefore describes the intended mode of financing for the 1,800 MW project, rather than a detailed debt-raising or equity-raising plan.

What role will the Shirwata project play for Tata Power?

Tata Power said the Shirwata PSP will be instrumental in RE-RTC applications, facilitate energy shifting and contribute to decarbonising hard-to-abate industries. These are the company’s stated reasons for the Rs 11,871 crore project and link the 1,800 MW asset to renewable-energy use cases.

Energy shifting is specifically identified by Tata Power as a project mechanism. The filing does not identify a particular industrial customer, contracted offtake arrangement or renewable-power supplier for the Shirwata project, despite citing RE-RTC applications and hard-to-abate industries.

The company also did not quantify expected energy storage, annual generation, operating hours, emissions reductions or financial contribution from the PSP. The announcement therefore establishes the intended strategic role of the project, its planned capacity and its funding scale, but not its eventual operational or financial output.

Conclusion

Tata Power has approved a Rs 11,871 crore, 1,800 MW pumped-storage investment at Shirwata, adding a planned 1.8 GW project to a disclosed existing capacity base of 16.9 GW. The company has set a 75% debt and 25% equity funding structure and described the project as supporting RE-RTC applications, energy shifting and decarbonisation of hard-to-abate industries.

The disclosed milestone to watch is the 51-month period for adding the proposed capacity. Tata Power has not disclosed a commissioning date, construction phases, lenders, customer arrangements, storage capability or expected operating output for the 1,800 MW project.