The 2026 ESS central contract market opens at a total of 1,180 MW. That is more than double the previous 540 MW.
1. Core Facts
- On 22 September 2026 the Ministry of Climate, Energy and Environment announced it would open the 2026 ESS central contract market and select generation operators for a total of 1,180 MW. The allocation is 1,100 MW on the mainland and 80 MW on Jeju. Bidding closes on 11 November and successful bidders are confirmed within the same month. Selected operators must complete ESS construction by February 2029 (THE ELEC, 2026-09-22).
- On 22 September SK On signed an LFP cathode material supply contract worth KRW 1.1 trillion with POSCO Future M. The contract term is three years from 2027 to 2029, and the material is applied to ESS LFP batteries produced at SK On’s plant in Georgia, USA. The two companies plan to discuss an additional supply contract beyond 2029 (THE ELEC, 2026-09-22).
- Earlier, on 17 September, SK On signed a KRW 160 billion LFP cathode material supply contract with L&F. The term is three years from 2026 to 2028 and the product is a high-density third-generation LFP cathode material. L&F completed its LFP cathode plant in the Dalseong-gun national industrial complex in Daegu in May 2026 (THE ELEC, 2026-09-17).
2. Mechanism-Perspective Impact Analysis
A market with a construction deadline fixed at February 2029 forces equipment lead times to be back-calculated. Cell production equipment is ordered well before operator selection, not after it. With the volume doubled, the ordering windows for coaters, presses and assembly lines narrow and overlap. Long-lead items such as large drying ovens and calender rolls move onto the project critical path.
The trend of cathode material contracts settling into three-year terms has a direct effect on line design. A line that runs a single chemistry for three years has less reason to hold wide margins for chemistry changeover. Slot-die shim replacement range, drying oven temperature profile range and calender line pressure range are all items traded against equipment cost. Dedication lowers unit cost but forfeits line conversion value, and whether the contract is extended after three years directly governs the payback period of that choice.
That the two contracts involve different suppliers, however, leaves a separate process management task. Feeding LFP cathode material from different suppliers into an identical cell design means differences in tap density and particle size distribution affect the coating thickness target and the calendering conditions. Whether to manage the process window separately per supplier, or to widen it to cover both materials, is directly tied to yield. The material property figures of the two contracted products have not been disclosed (undisclosed). Recalculation with supplier-specific powder property data is required before design implementation.
3. Specification Comparison
| Item | POSCO Future M contract | L&F contract |
|---|---|---|
| Announcement date | 2026-09-22 | 2026-09-17 |
| Value | KRW 1.1 trillion | KRW 160 billion |
| Contract term | 2027–2029 (3 years) | 2026–2028 (3 years) |
| Product | LFP cathode material | High-density third-generation LFP cathode material |
| Application | ESS LFP batteries at the Georgia, USA plant | ESS LFP batteries produced in Korea and the USA |
| Extension clause | Additional supply contract to be discussed after 2029 | Extendable up to three years after 2028 |
| Supplier production base | Not disclosed (undisclosed) | LFP cathode plant, Dalseong-gun national industrial complex, Daegu (completed 2026-05) |
Items Requiring Confirmation
- The energy capacity basis (MWh) and the successful bid price for the 1,180 MW central contract market were not included in the announcement (undisclosed).
- The annualized volume and powder properties of the two LFP cathode contracts have not been disclosed (undisclosed).
One-line summary: A doubled ESS market and three-year long-term cathode contracts point in the same direction. Lines have less reason to stay flexible and more reason to be dedicated.
Source: THE ELEC 2026-09-22, 2026-09-22 and 2026-09-17 reports on the ESS central contract market and SK On LFP cathode material purchases.