Dry-season security and storage · Reservoir PPA Directive 2082 and a 9,851 MW pumped-storage pipeline still at study
Where it stands: Reservoir purchase-sale directive issued but storage PPA pricing still at discussion-paper and cost-benchmarking stage
Nepal exports 3,965 GWh in the monsoon and imports 1,171 GWh in the dry season because its fleet is almost all run-of-river: the three Kulekhani storage plants supplied about 92 GWh of 19,078 GWh and both NEA thermal stations ran not at all. The ERC's Reservoir Plant Purchase and Sale Directive 2082 and its storage-hydro PPA pricing paper are the first attempt to price dry-season energy, while 12 pumped-storage projects of 9,851 MW were screened in FY 2025/26 and none has cleared feasibility.
The problem
Nepal's system has no dispatchable depth. Of 19,078 GWh of system energy in FY 2025/26 the three Kulekhani storage plants supplied roughly 92 GWh, about half a percent, and NEA's two thermal stations, the Duhabi multifuel plant and the Hetauda diesel plant, generated zero for the entire year. There are no grid-scale batteries in service. The result is a system that spills and exports in the monsoon and buys back in the dry season: 1,171 GWh of imports costing NRs 10.56 billion, with a system peak of 3,226 MW recorded on 6 July 2026 against a national peak of 2,479 MW on 28 June 2026. The Commission's own long-run marginal cost study prices that asymmetry precisely: at the busbar, marginal energy cost is NPR 6.89/kWh in the dry-season peak and NPR 0.54/kWh in the wet-season off-peak, and in the dry season proxy diesel sets the marginal price for about 4.6 percent of hours while Indian imports set it for about 30.8 percent. A flat PPA rate cannot procure a resource whose value varies by that much.
What it does
The Electricity Regulatory Commission has begun building a separate price for stored energy. It issued a Reservoir-type Power Plant Electricity Purchase and Sale Directive 2082, published a discussion paper on storage hydro PPA pricing, and in August 2026 published the long-run marginal cost and tariff design study that quantifies dry-season peak capacity and energy cost by voltage level, which is the input a differentiated storage rate needs. NEA's build programme follows the same logic. Its Project Development Department is studying mega multipurpose storage schemes totalling 11,483 MW, run-of-river projects of 562 MW and pumped-storage projects of 928.5 MW; from FY 2080/81 through FY 2082/83 it screened and ranked 63 pumped-storage projects with an aggregate 69,428 MW out of 220 identified sites, and 13 storage projects totalling 3,088 MW out of 24 identified. In FY 2025/26 alone it screened 12 pumped-storage projects totalling 9,851 MW from 34 identified sites and three storage projects totalling 301.7 MW, and carried out pre-feasibility work on Kolpu Storage (100.1 MW) and G-25 pumped storage (411 MW). The flagship is Hulingtar-Dumkim in Dhading and Chitwan at about 494.5 MW, where the survey licence is held and the feasibility study is under way; Syarpu Lake (334 MW) in Rukum West holds a survey licence obtained in 2023 and since extended; and Kulekhani Sisneri is in geotechnical investigation and environmental impact assessment. On conventional storage, the 670 MW Dudhkoshi project is targeting financial closure in October 2026 with commissioning envisaged by 2035, and the 821 MW Uttar Ganga project has a grid connection agreement signed with its PPA and generation licence in process. NEA also plans a 100 MW battery energy storage system and a 2.5 MW electrolyser at Hetauda, and intends to use public-private partnership for batteries and smart meters.
Market effect
The commercial consequence of the seasonal asymmetry is that Nepal sells its surplus at monsoon prices and buys its scarcity at dry-season prices, on an exchange it does not control. Export revenue of NRs 29,314 million against import cost of NRs 10.56 billion nets positive today, but every new run-of-river megawatt widens the spread the system has to trade through. A cost-reflective reservoir and pumped-storage PPA rate would change the merit order of what gets built: at a dry-season peak marginal energy cost of NPR 6.89/kWh at the busbar and a marginal capacity cost of NPR 2,836 per coincident kW per month, storage and peaking capacity are worth multiples of what a flat run-of-river contract pays, which is precisely why 227 run-of-river IPP plants exist and not one pumped-storage plant does. For developers and lenders the gating item is not the resource — 220 pumped-storage sites have been identified — but a bankable tariff and a counterparty: none of the 12 projects screened in FY 2025/26 has cleared feasibility and the flagship 494.5 MW scheme is still in study. Until that changes the dry-season balance stays outsourced to India under discretionary approvals, and the 1,400 MW of agreed import capability on the Dhalkebar corridor is the country's real reserve margin.
Key numbers
- Storage output
- About 92 GWh from the three Kulekhani plants out of 19,078 GWh of system energy; both NEA thermal stations generated zero
- Dry-season imports
- 1,171 GWh costing NRs 10.56 billion in FY 2025/26
- Seasonal marginal energy cost
- NPR 6.89/kWh dry-season peak vs NPR 0.54/kWh wet-season off-peak at the busbar
- Pumped-storage pipeline
- 12 projects totalling 9,851 MW screened in FY 2025/26 from 34 sites; 63 projects and 69,428 MW screened over three years; none past feasibility
- Storage projects in development
- Dudhkoshi 670 MW, financial closure targeted October 2026 and commissioning 2035; Uttar Ganga 821 MW
Who gains and who pays
- Reservoir and pumped-storage developers (gains): A differentiated storage PPA rate is the precondition for financing; 9,851 MW screened in FY 2025/26 alone.
- Nepal Electricity Authority (obligation): Carries the dry-season balancing risk and NRs 10.56 billion of import cost with about 92 GWh of storage output to work with.
- Run-of-river IPPs (costs): A cost-reflective seasonal rate reduces the relative value of flat wet-season energy.
- Industrial consumers and dry-season load (mixed): Exposed to dry-season scarcity pricing but would gain firm supply from storage and batteries.
- Battery and pumped-storage equipment suppliers (gains): A 100 MW battery system and a 2.5 MW electrolyser are planned, with PPP procurement intended.
Implementation
The Reservoir Plant Electricity Purchase and Sale Directive 2082 and the storage-hydro PPA pricing discussion paper sit with the Commission alongside the hydropower generation and operational cost benchmarking studies; together they are meant to produce a storage and peaking tariff distinct from the run-of-river rate. NEA's pumped-storage projects are at survey-licence and feasibility stage with the Department of Electricity Development, and survey licences must be extended year by year — the Syarpu Lake licence obtained in 2023 has already been extended once, and the Upper Tila survey licence runs only to 3 October 2026. Dudhkoshi's targeted October 2026 financial closure with ADB support is the nearest real test of whether a Nepali storage project can be financed, and the Uttar Ganga PPA is the nearest test of whether a storage rate exists to sign against. The 100 MW battery system is stated as an intention rather than a procurement.
Concerns
- No pumped-storage project has cleared feasibility despite 220 identified sites and three years of screening
- Dry-season adequacy depends entirely on Indian imports under discretionary Power Exchange Committee approvals
- No grid-scale battery in service and the 100 MW system is an intention rather than a tender
- Reservoir and pumped-storage PPA pricing is still a directive and a discussion paper, not a published rate
- Survey licences for storage schemes expire annually and must be extended, adding development risk
- Kulekhani reservoir inflow and sedimentation limit the only existing storage the system has
Dates to watch
- 2026-10: Targeted financial closure of the 670 MW Dudhkoshi storage project
- 2027: ERC decision on a differentiated reservoir and pumped-storage PPA rate
- 3 October 2026: Expiry of the Upper Tila survey licence, indicative of the annual renewal risk across the storage pipeline
Sources
- Reservoir-type Power Plant Electricity Purchase and Sale Directive 2082, Electricity Regulatory Commission, Nepal (official text)
- ERC directives register, Electricity Regulatory Commission, Nepal
- Report on Long Run Marginal Cost Estimation and Tariff Design for Nepal's Evolving Power Sector (July 2026), Electricity Regulatory Commission, Nepal
- Nepal Electricity Authority, A Year in Review: Annual Report FY 2025/26 (2082/83), Nepal Electricity Authority
- ERC documents register, including the discussion paper on storage hydro PPA pricing, Electricity Regulatory Commission, Nepal
Checked against sources on .