Renewable Output Control in Mainland Kyushu: 77 Days Recorded in FY2026 (Latest 10/22)In Kyushu, solar plants are sometimes asked to pause
According to a document that Kyushu Electric Power Transmission and Distribution updates daily, output control of renewable generation in mainland Kyushu is recorded on 77 days in FY2026 (from April) as of 10/26. The latest record is 10/22 (Thu), 10:00–14:30, with a curtailed volume of 0.24 GW. The document includes provisional figures that are updated daily.
Key points
- Days with a curtailed volume recorded in FY2026: 77 (4/2 to 10/22). By month: 26/4: 18, 26/5: 26, 26/6: 14, 26/9: 7, 26/10: 12
- Most recent records: 10/17 (Sat) 8:00–16:00, 1.29 GW; 10/18 (Sun) 8:00–14:30, 1.21 GW; 10/22 (Thu) 10:00–14:30, 0.24 GW
- On 30 other days an instruction was issued the day before but the actual record shows no output control (the document notes that instructions may not be carried out depending on same-day supply and demand)
- The largest curtailed volume this fiscal year is 5.81 GW (5/4, Mon)
What to do in practice
- If output in a month was lower than expected, check whether curtailment days and hours explain it
- When estimating electricity sales revenue, assume that there will be days when generation is curtailed
Electricity must be used as fast as it is made. On sunny afternoons there can be too much solar power, so power plants are asked to stop for a while. This is called output control. In FY2026, 77 days are recorded in mainland Kyushu.
Points
- So far this fiscal year (from April), 77 days are recorded
- The latest record is 10/22 (Thu): plants paused during 10:00–14:30
- The document is updated every day, and numbers can be corrected later
What the words mean
- Output control
- Asking solar and other power plants to stop or reduce generation for a while when there would be too much electricity
- 10,000 kW
- A unit for the size of electricity. 100 of these units equal 1 GW
- Kyushu Electric Power Transmission and Distribution: Kyushu Electric Power Transmission and Distribution: Renewable output control instructions and outlook for mainland Kyushu (updated daily)
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