ACME Solar PPA with SECI: 25-year, 490 MW boost 2026

Two long-tenure PPAs add scale to ACME Solar’s pipeline

ACME Solar Holdings has signed two separate 25-year Power Purchase Agreements (PPAs) with SECI Limited, covering a total of 490 MW of ISTS-connected renewable capacity with assured peak supply obligations. The agreements were signed through different subsidiaries and span two procurement programmes: SECI’s FDRE Tranche-VII and SECI’s Hybrid Tranche-VI.

The PPAs matter because they lock in long-duration offtake, define specific performance obligations, and, in one case, disclose a fixed tariff. Both projects are structured around delivering dependable power during peak demand periods, supported by storage and hybrid generation.

FDRE Tranche-VII: 300 MW / 1,200 MWh assured peak power PPA

In the first development, ACME Solar, through its subsidiary ACME Renewtech Sixth, signed a 25-year PPA with the Solar Energy Corporation of India (SECI), described as a AAA-rated Central Government enterprise. The agreement covers 300 MW / 1,200 MWh of ISTS-connected assured peak power capacity.

The project is structured as an FDRE (Firm and Dispatchable Renewable Energy) arrangement. It will be connected to ISTS substations and will use ACME Solar’s existing night-time connectivity available at high irradiation zones.

Supply profile: 4-hour non-solar peak and 85% annual availability

Under the FDRE PPA, ACME Solar will supply 4 hours of assured peak power only during non-solar hours. The agreement also includes a minimum annual availability requirement of 85%.

These conditions set clear operational expectations for the asset, including a focus on delivering power during hours when solar generation is typically unavailable. The 1,200 MWh capacity referenced alongside the 300 MW assured peak capacity indicates a four-hour energy delivery block aligned to the PPA’s peak supply obligation.

How the FDRE project was awarded: LOA and e-reverse auction dates

The 300 MW / 1,200 MWh FDRE project was awarded under SECI’s FDRE Tranche-VII tender. ACME Solar received the Letter of Award (LOA) dated February 10, 2026.

SECI’s tender was issued under Tariff-Based Competitive Bidding (TBCB) guidelines. The e-reverse auction for the tranche was conducted on February 02, 2026.

Contracted portfolio update: 6,570 MW PPA-signed out of 8,070 MW

Following this PPA signing, ACME Solar disclosed an updated portfolio position. Out of its total contracted portfolio of 8,070 MW, the PPA-signed portfolio stands at 6,570 MW.

This disclosure helps separate contracted capacity that has completed PPA execution from capacity that may still be in other stages of contracting or documentation. The company did not provide additional breakup details in the provided information.

Hybrid Tranche-VI: 190 MW ISTS wind-solar hybrid with BESS

In the second development, ACME Solar Holdings, through its wholly owned subsidiary ACME Urja One Private Limited, signed a 25-year PPA with SECI Limited for a 190 MW ISTS-connected wind-solar hybrid power project with assured peak supply.

The agreement was executed on February 18, 2026. The 190 MW project forms part of a broader 380 MW capacity under SECI’s Hybrid Tranche-VI programme, and the PPA for the first 190 MW has now been contracted.

Operating obligations for the 190 MW project: CUF and peak supply requirement

The hybrid project combines wind and solar generation along with a Battery Energy Storage System (BESS) to support assured peak power supply. Under the PPA terms, the plant must maintain a minimum annual Capacity Utilisation Factor (CUF) of 50%.

It must also meet at least 80% of daily peak power requirements, as stated in the disclosures. These obligations link payment and dispatch expectations to both annual energy performance (CUF) and daily peak support.

Tariff, regulatory approvals, and project schedule

The power from the 190 MW hybrid project will be supplied at a fixed tariff of ₹4.72 per unit. The Scheduled Commercial Operation Date (SCOD) is February 27, 2028, and the PPA tenure is 25 years from the date of signing.

ACME Solar stated that the tariff has been adopted by the Central Electricity Regulatory Commission (CERC). It also said the power procurement plan has been approved by the appropriate State Electricity Regulatory Commission.

Connectivity and financing: transmission readiness and PFC support

For the 190 MW hybrid project, ACME Solar indicated that grid connectivity for the solar, wind, and BESS components has been secured. It also said connectivity and the transmission system are scheduled for completion within the commercial operation date timeline set in the PPA.

On financing, the company disclosed that the project is financed by Power Finance Corporation Ltd (PFC) under Phase II of the company’s existing sanctioned facilities.

What these PPAs signal for dispatchable renewables under ISTS

Together, the FDRE and hybrid PPAs underscore SECI’s procurement focus on assured peak supply, not just installed megawatts. The FDRE contract specifies a four-hour non-solar supply window and a minimum 85% annual availability requirement, while the hybrid contract ties obligations to CUF and daily peak coverage.

For investors tracking renewable developers, the disclosures provide concrete markers: PPA tenures, tender tranches, execution dates, and, for the hybrid project, a stated tariff and SCOD. The portfolio update of 6,570 MW of PPA-signed capacity out of 8,070 MW contracted also offers a snapshot of execution progress.

Key facts at a glance

Conclusion

ACME Solar’s two SECI PPAs signed in February 2026 cover a 300 MW / 1,200 MWh FDRE assured-peak project and a 190 MW wind-solar hybrid project with BESS, both under 25-year contracts. The agreements lay out defined delivery and performance requirements, and the hybrid PPA sets a tariff of ₹4.72 per unit with an SCOD of February 27, 2028. The company’s disclosed portfolio position now stands at 6,570 MW of PPA-signed capacity out of 8,070 MW contracted, with further project execution milestones expected to follow the PPA timelines already stated.