- Oman and State Grid will develop two 500 MW battery systems at Duqm and Ibri under a framework agreement signed on 2 November 2026.
- The investment is valued at approximately $1 billion (US dollars), or RO384.5 million (Omani rials), according to Construction Review Online.
- Both systems will connect to Oman’s national grid at 400 kV, but duration, chemistry and commissioning dates remain undisclosed.
For the Oman battery storage Duqm Ibri deal, the headline investment converts to $1,000 per kilowatt of power capacity by simple division of $1 billion (US dollars) by 1,000 MW, as Joule Post arithmetic. That figure is the most that can honestly be said about cost today. Battery cost is usually quoted per kilowatt-hour of stored energy as well as per kilowatt of power, yet the announcement discloses no energy capacity in megawatt-hours, so no dollars-per-kilowatt-hour figure can be derived from it. Any report quoting a storage cost for Duqm-Ibri without a duration fills a gap the announcement left open. Lenders and grid planners size a storage asset from both power and energy, so the missing duration leaves the most useful cost figure uncalculated for now.
Oman’s Nama Holding, a subsidiary of the Oman Investment Authority, signed a framework agreement with China’s State Grid International Development on 2 November 2026 to develop battery energy storage systems with a combined capacity of 1 GW, according to Construction Review Online and SaudiGulf Projects. The agreement was signed during Sultan Haitham bin Tarik’s official visit to China, as part of a package of Oman-China economic and investment agreements. One system will sit at Duqm Industrial Station in Al Wusta Governorate, and the second will connect to Al-Subaikhi Station, also identified as Ibri Solar 3 Station, in Ad Dhahirah Governorate.
What the Duqm-Ibri framework agreement commits
A framework agreement is a cooperation and development commitment, and it precedes any construction contract, a distinction that matters for timelines. Construction Review Online reports that the agreement does not disclose battery chemistry, storage duration or detailed engineering specifications, and provides no confirmed construction start or commissioning dates, with engineering, procurement and construction contractors still unannounced. The framework establishes cooperation between the two companies to evaluate and develop the facilities, so further announcements will clarify delivery arrangements and technical scope.
The grid connection detail is firmer. Both facilities will operate at 400 kV and integrate with Oman’s national electricity transmission network, according to Construction Review Online. That voltage level places the batteries at the transmission backbone rather than at a distribution feeder, which suits their stated purpose: storing surplus electricity, especially from solar and wind, and releasing it when demand peaks or renewable output falls. A transmission-connected battery can serve system-wide balancing, while a distribution-connected battery serves a local feeder, and the Duqm-Ibri design points to the system-wide role.
The partnership behind the agreement is not new. SaudiGulf Projects reports that Nama Holding agreed in 2019 to sell a 49 percent stake in Oman Electricity Transmission Company, its grid subsidiary, to State Grid International Development, with the deal closing in 2020. State Grid also built, with Saudi Arabia’s Alfanar, the 2,000 MWh Bisha battery system in Saudi Arabia, one of the largest in the region. The Duqm-Ibri framework extends an existing transmission relationship into storage, which may shorten the learning curve on grid integration even though the battery scope itself remains to be defined.
| Item | Duqm-Ibri framework | Oman’s separate Nama PWP procurement |
|---|---|---|
| Power capacity | 1,000 MW across two sites | 950 MW across five sites |
| Energy capacity | Not disclosed | 3,800 MWh |
| Implied duration | Cannot be calculated | 4.0 hours (3,800 divided by 950) |
| Largest single site | 500 MW each at Duqm and Ibri | 500 MW at Sohar |
| Status | Framework agreement, 2 November 2026 | Procurement under way, reported separately |
The table separates two programmes that are easy to confuse. Nama Power and Water Procurement Company is advancing a separate 950 MW standalone battery storage programme across five installations with a combined planned storage capacity of 3,800 MWh, according to Construction Review Online, which divides to a 4.0-hour average duration as Joule Post arithmetic. Its largest facility will deliver 500 MW at Sohar. That programme is distinct from the Duqm-Ibri framework, and adding the two together would double-count nothing, but it would also misstate both: the framework’s energy capacity is unknown, so no combined megawatt-hour total exists yet.
Why the Oman battery storage Duqm Ibri deal matters for the grid
Oman’s renewable pipeline explains the timing. SaudiGulf Projects reports Nama Power and Water Procurement targeting about 3 GW of storage by 2030, alongside around 7 GW of solar and 3 GW of wind. Construction Review Online reports Oman Electricity Transmission Company plans to connect approximately 5.7 GW of solar capacity and more than 2 GW of wind power between 2027 and 2030. Solar and wind output varies with weather and time of day, and a grid adding that much variable generation needs storage that can absorb midday solar surplus and release it into the evening peak, which is exactly the balancing role the Duqm-Ibri batteries are described as filling.
Existing projects show Oman already working through the integration problem at smaller scale. The Ibri III Solar Independent Power Project combines 500 MW of solar photovoltaic capacity with a 100 MWh battery system and reached financial close in January 2026, according to Construction Review Online. That pairing is a different design from a standalone grid battery: the Ibri III battery smooths and firms the output of its own solar plant, while the Duqm-Ibri batteries are described as system assets connected at transmission level. Both designs will be needed as solar share rises, because plant-level firming and system-level balancing solve different parts of the same variability problem.
The wider Oman pipeline reinforces the same point. SaudiGulf Projects lists a 2.7 GW wind, solar and battery project in Mahout and Duqm designed to supply power around the clock, qualification rounds for 1.5 GW of new solar including a 1,000 MW plant in Adam with integrated battery storage, and a 2 GW pumped hydro project near Wadi Dayqah Dam. Pumped hydro, standalone batteries and integrated solar-plus-storage each cover a different duration and a different grid service, and a system targeting around 3 GW of storage by 2030 will likely use all three rather than betting on one technology.
The questions the framework leaves open
Duration tops the list of unanswered questions, because it decides what the batteries can do. A 500 MW battery that discharges for one hour stores 500 MWh and covers a short evening ramp, while the same 500 MW discharging for four hours stores 2,000 MWh and covers a full evening peak. The separate Nama PWP programme’s 4.0-hour average shows what a four-hour design looks like, but it says nothing about Duqm-Ibri, and the framework’s silence on duration means the system’s real contribution to evening supply cannot yet be quantified. Chemistry matters for the same reason: lithium iron phosphate, the chemistry behind most grid batteries today, carries different fire, lifetime and cost characteristics from other chemistries, and the agreement names none.
Financing and contracting form the second open set. The $1 billion (US dollars) figure is an estimated investment value, and financing close has not been announced. The framework names no construction contractor, no equipment supplier and no commissioning date. The next announcements that would turn this framework into a project are a defined scope with duration and chemistry, a financing arrangement, an equipment contract and a construction schedule. Until those arrive, the right way to describe Duqm-Ibri is as a signed framework for 1 GW of transmission-connected battery power, with the energy, cost-per-kilowatt-hour and delivery date still to be defined.
For readers following storage economics, Joule Post’s storage explainer sets out how grid batteries earn their keep through balancing, peak shaving and renewable integration: Battery Energy Storage Explained. The home-scale side of the same story, where a single battery changes a household’s outage resilience, is covered in the Powerwall expansion guide published alongside this article: Tesla Powerwall 3 Expansion Packs Add 13.5 kWh Each for $5,900 in Hardware.
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