Global Investment Opportunity: Battery Energy Storage System (BESS) Projects in Sri Lanka – Addendum No. 01

IMPORTANT UPDATE — ADDENDUM NO. 01

Updated Request for Proposals for 250 MW / 1000 MWh Standalone Battery Energy Storage System

The National System Operator (Pvt) Ltd. has issued Addendum No. 01 for the establishment of 250 MW / 1000 MWh Standalone Battery Energy Storage System projects on a Build, Own and Operate (BOO) basis.

RFP Document Available Until
September 03, 2026
3:00 PM
Proposal Submission Deadline
September 04, 2026
10:00 AM

Key Updates Under Addendum No. 01

  • Proposal submission deadline extended to September 04, 2026 at 10:00 AM.
  • RFP document availability extended until September 03, 2026 at 3:00 PM.
  • Project land must be located within a maximum 5 km from the designated Grid Substation.
  • Additional Grid Interconnection Confirmation requirements apply where Option 2 is selected.
  • Initial BESS simulation models or test results are required as specified in the revised compliance schedule.
  • Revised Energy Storage Agreement and Tripartite Agreement are included as part of the Addendum.
  • Proposal Security validity has been revised to March 03, 2027.
  • A project proponent may submit a maximum of two technical proposals.

Project Requirements

Project Model BOO
Operational Period 15 Years
Individual Project 10 MW / 40 MWh
Connection Level 33 kV
Land Requirement Within 5 km of GSS

RFP Information

Bid No. TR/REP&PM/ICB/2026/001/C
Local RFP Fee LKR 150,000
Overseas RFP Fee USD 500
Document Available Until 03 Sep 2026
Submission Deadline 04 Sep 2026

RFP & Tender Documents

Investors and project proponents can review the original tender advertisement and the latest Addendum No. 01 before preparing their proposals.

For Further Information

Director (RE & ESCP)

National System Operator (Pvt) Ltd.

📞 +94 11 2583344 / 2697044

✉️ re_escp@nso.lk

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