SMP merit-order simulator
Raise demand and generators switch on from the cheapest. The cost of the last price-setting unit becomes the SMP.
Capacities are actual (KPX 2025). Costs are illustrative — actual unit variable costs are not public; only the order is realistic.
SMP90원/kWh
Price set by: Coal
| Source (cheapest first) | Capacity | Cost (illustrative) | Running |
|---|---|---|---|
| Renewablesreflected separately in the day-ahead plan first | 19.5 GW | 0 | 19.5 GW |
| Nuclear | 26.1 GW | 10 | 26.1 GW |
| Coal | 41.7 GW | 90 | 34.5 GW |
| LNG | 48.4 GW | 150 | 0 GW |
| Oil | 0.5 GW | 250 | 0 GW |
This tool shows the mechanism; it does not forecast prices.