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Investments in Associates 2 (Details) - KRW (₩)
₩ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Book value    
Beginning balance ₩ 5,844,464 ₩ 5,232,373
Acquisition 422,109 95,037
Disposal (2,911) (31,398)
Dividends received (486,012) (599,328)
Share of profit (loss) 334,379 1,091,588
Other comprehensive income (loss) 73,198 45,268
Others (8,338) 10,924
Ending balance 6,176,889 5,844,464
Korea Gas Corporation    
Book value    
Beginning balance 2,085,296 1,815,513
Acquisition 0 0
Disposal 0 0
Dividends received 0 (51,559)
Share of profit (loss) (155,819) 305,638
Other comprehensive income (loss) 47,220 7,746
Others (6,054) 7,958
Ending balance 1,970,643 2,085,296
Korea Electric Power Industrial Development Co., Ltd.    
Book value    
Beginning balance 31,078 24,617
Acquisition 0 0
Disposal 0 0
Dividends received (2,156) (1,872)
Share of profit (loss) 1,790 3,807
Other comprehensive income (loss) 0 0
Others (1,212) 4,526
Ending balance 29,500 31,078
YTN Co., Ltd.    
Book value    
Beginning balance 55,027 [1] 51,828
Acquisition 0 0
Disposal 0 0
Dividends received (540) (450)
Share of profit (loss) (1,147) 1,565
Other comprehensive income (loss) (14) (34)
Others (1,023) 2,118
Ending balance 52,303 [2] 55,027 [1]
Gangwon Wind Power Co., Ltd.    
Book value    
Beginning balance 12,158 [3] 10,554
Acquisition 0 0
Disposal 0 0
Dividends received (2,272) (1,420)
Share of profit (loss) 2,115 3,024
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance [3] 12,001 12,158
Hyundai Green Power Co., Ltd.    
Book value    
Beginning balance 119,791 121,955
Acquisition 0 0
Disposal 0 0
Dividends received (3,555) (4,008)
Share of profit (loss) 2,159 1,770
Other comprehensive income (loss) 0 1,345
Others (222) (1,271)
Ending balance 118,173 119,791
Korea Power Exchange    
Book value    
Beginning balance 275,126 [4] 269,728
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 4,575 772
Other comprehensive income (loss) 0 0
Others (5,415) 4,626
Ending balance [4] 274,286 275,126
Taebaek Wind Power Co., Ltd.    
Book value    
Beginning balance 14,501 [5] 6,800
Acquisition 0 7,684
Disposal 0 0
Dividends received 0 (825)
Share of profit (loss) 0 842
Other comprehensive income (loss) 0 0
Others (14,501) 0
Ending balance 0 14,501 [5]
Taebaek Guinemi Wind Power Co., Ltd.    
Book value    
Beginning balance 13,049 [5] 3,357
Acquisition 0 9,217
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 481 475
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 13,530 [6] 13,049 [5]
Pyeongchang Wind Power Co., Ltd.    
Book value    
Beginning balance 0 5,411
Acquisition   5,454
Disposal   0
Dividends received   (100)
Share of profit (loss)   3,695
Other comprehensive income (loss)   0
Others   (14,460)
Ending balance   0
Daeryun Power Co., Ltd.    
Book value    
Beginning balance 26,727 [3] 25,426
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 143 429
Other comprehensive income (loss) (12) 1
Others (24) 871
Ending balance [3] 26,834 26,727
Changjuk Wind Power Co., Ltd.    
Book value    
Beginning balance 0 8,355
Acquisition   11,862
Disposal   0
Dividends received   (1,350)
Share of profit (loss)   817
Other comprehensive income (loss)   0
Others   (19,684)
Ending balance   0
KNH Solar Co., Ltd.    
Book value    
Beginning balance 2,883 2,278
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 311 606
Other comprehensive income (loss) 0 (1)
Others 0 0
Ending balance 3,194 2,883
SPC Power Corporation    
Book value    
Beginning balance 70,868 [7] 65,046
Acquisition 0 0
Disposal 0 0
Dividends received (2,669) (2,694)
Share of profit (loss) 9,667 1,188
Other comprehensive income (loss) 1,065 7,330
Others 0 (2)
Ending balance 78,931 [8] 70,868 [7]
Gemeng International Energy Co., Ltd.    
Book value    
Beginning balance 578,821 595,218
Acquisition 102,854 0
Disposal 0 0
Dividends received (12,527) 0
Share of profit (loss) 41,280 (233)
Other comprehensive income (loss) 565 (16,164)
Others (5,181) 0
Ending balance 705,812 578,821
PT. Cirebon Electric Power    
Book value    
Beginning balance 135,114 121,969
Acquisition 0 0
Disposal 0 0
Dividends received (10,770) (10,659)
Share of profit (loss) 7,519 14,776
Other comprehensive income (loss) 0 704
Others 2,396 8,324
Ending balance 134,259 135,114
KNOC Nigerian East Oil Co., Ltd.    
Book value    
Beginning balance 0 [9] 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (7) (11)
Other comprehensive income (loss) (213) (787)
Others 220 798
Ending balance [9] 0 0
KNOC Nigerian West Oil Co., Ltd.    
Book value    
Beginning balance 0 [9] 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (7) (10)
Other comprehensive income (loss) (196) (724)
Others 203 734
Ending balance [9] 0 0
PT Wampu Electric Power    
Book value    
Beginning balance 37,743 35,077
Acquisition 0 0
Disposal 0 0
Dividends received (3,850) (5,551)
Share of profit (loss) (268) 5,848
Other comprehensive income (loss) 224 54
Others 706 2,315
Ending balance 34,555 37,743
PT. Bayan Resources TBK    
Book value    
Beginning balance 684,719 661,289
Acquisition 0 0
Disposal 0 0
Dividends received (344,360) (515,139)
Share of profit (loss) 252,406 531,528
Other comprehensive income (loss) 26,500 7,041
Others (58) 0
Ending balance 619,207 684,719
S-Power Co., Ltd.    
Book value    
Beginning balance 141,128 122,786
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 21,637 18,342
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 162,765 141,128
Pioneer Gas Power Limited    
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 0
Eurasia Energy Holdings    
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 0
Xe-Pian Xe-Namnoy Power Co., Ltd.    
Book value    
Beginning balance 115,584 92,441
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (848) 15,582
Other comprehensive income (loss) 1,642 7,561
Others 0 0
Ending balance 116,378 115,584
PT. Mutiara Jawa    
Book value    
Beginning balance 3,597 2,569
Acquisition 0 0
Disposal 0 0
Dividends received (459) 0
Share of profit (loss) 1,936 1,197
Other comprehensive income (loss) 94 (169)
Others 0 0
Ending balance 5,168 3,597
Samcheok Eco Materials Co., Ltd.    
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 0
Noeul Green Energy Co., Ltd.    
Book value    
Beginning balance 0 3,808
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 (3,824)
Other comprehensive income (loss) 0 0
Others 0 16
Ending balance 0 0
Goseong Green Power Co., Ltd.    
Book value    
Beginning balance 288,893 260,858
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (1,240) 27,992
Other comprehensive income (loss) 0 0
Others (29) 43
Ending balance 287,624 288,893
Gangneung Eco Power Co., Ltd.    
Book value    
Beginning balance 0 [3] 2,288
Acquisition 258,100 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (3,171) (2,288)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 254,929 [10] 0 [3]
Shin Pyeongtaek Power Co., Ltd.    
Book value    
Beginning balance 133,823 93,074
Acquisition 0 0
Disposal 0 0
Dividends received (70,040) 0
Share of profit (loss) 81,258 40,713
Other comprehensive income (loss) 0 0
Others (15) 36
Ending balance 145,026 133,823
Haeng Bok Do Si Photovoltaic Power Co., Ltd.    
Book value    
Beginning balance 278 223
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 16 55
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 294 278
Dongducheon Dream Power Co., Ltd.    
Book value    
Beginning balance 89,300 [11] 74,198
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (2,568) 15,086
Other comprehensive income (loss) 0 0
Others 471 16
Ending balance [11] 87,203 89,300
Jinbhuvish Power Generation Pvt. Ltd.    
Book value    
Beginning balance 0 [3] 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance [3] 0 0
Daejung Offshore Wind Power Co., Ltd.    
Book value    
Beginning balance 1,555 1,704
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (72) (149)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 1,483 1,555
GS Donghae Electric Power Co., Ltd.    
Book value    
Beginning balance 260,145 243,772
Acquisition 0 0
Disposal 0 0
Dividends received (21,846) 0
Share of profit (loss) 21,240 15,717
Other comprehensive income (loss) 0 0
Others (454) 656
Ending balance 259,085 260,145
Daegu Photovoltaic Co., Ltd.    
Book value    
Beginning balance 2,849 2,342
Acquisition 0 0
Disposal 0 0
Dividends received (408) (268)
Share of profit (loss) 363 775
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 2,804 2,849
Busan Green Energy Co., Ltd.    
Book value    
Beginning balance 4,395 5,032
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (1,137) (667)
Other comprehensive income (loss) 0 0
Others 1 30
Ending balance 3,259 4,395
Gunsan Bio Energy Co., Ltd.    
Book value    
Beginning balance 0 [3] 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 0 [3]
Korea Electric Vehicle Charging Service    
Book value    
Beginning balance 0 1,250
Acquisition   0
Disposal   (1,293)
Dividends received   0
Share of profit (loss)   43
Other comprehensive income (loss)   0
Others   0
Ending balance   0
Hansuwon KNP Co., Ltd. (formerly, Korea Nuclear Partners Co., Ltd.)    
Book value    
Beginning balance 280 219
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 187 61
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 467 280
Korea Electric Power Corporation Fund    
Book value    
Beginning balance 28,842 [12] 47,983
Acquisition 0 0
Disposal (2,266) (25,297)
Dividends received 0 0
Share of profit (loss) (2,865) 7,966
Other comprehensive income (loss) (290) (1,810)
Others 0 0
Ending balance [12] 23,421 28,842
Energy Infra Asset Management Co., Ltd.    
Book value    
Beginning balance 1,184 [3] 1,066
Acquisition 0 0
Disposal 0 0
Dividends received (89) 0
Share of profit (loss) 118 118
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 1,213 [13] 1,184 [3]
Daegu clean Energy Co., Ltd.    
Book value    
Beginning balance 12 12
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others (12) 0
Ending balance 0 12
YaksuESS Co., Ltd.    
Book value    
Beginning balance 486 716
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (201) (230)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 285 486
Nepal Water & Energy Development Company Private Limited    
Book value    
Beginning balance 69,940 [14] 66,333
Acquisition 40,103 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (325) (923)
Other comprehensive income (loss) 855 4,530
Others 0 0
Ending balance [14] 110,573 [10] 69,940
Gwangyang Green Energy Co., Ltd.    
Book value    
Beginning balance 25,044 25,466
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (406) (422)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 24,638 25,044
PND Solar Co., Ltd.    
Book value    
Beginning balance 1,403 1,229
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 107 174
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 1,510 1,403
Hyundai Eco Energy Co., Ltd.    
Book value    
Beginning balance 7,631 [3] 5,572
Acquisition 0 0
Disposal 0 0
Dividends received (874) 0
Share of profit (loss) 1,198 2,058
Other comprehensive income (loss) (8) 1
Others 0 0
Ending balance [3] 7,947 7,631
YeongGwang Yaksu Wind Electric Co., Ltd.    
Book value    
Beginning balance 156 [3] 233
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (23) 143
Other comprehensive income (loss) 0 0
Others 0 (220)
Ending balance [3] 133 156
Green Energy Electricity Generation Co., Ltd.    
Book value    
Beginning balance 1,571 1,713
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (1,563) (142)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 8 1,571
Korea Energy Solutions Co., Ltd.    
Book value    
Beginning balance 93 123
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 77 (30)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 170 93
ITR Co., Ltd.    
Book value    
Beginning balance 0 32
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (33) (32)
Other comprehensive income (loss) 0 0
Others 33 0
Ending balance 0 [15] 0
STN Co., Ltd. (formerly, Structure test network Co., Ltd.)    
Book value    
Beginning balance 366 306
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 25 60
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 391 366
Namjeongsusang Solar Power Operation Co., Ltd.    
Book value    
Beginning balance 373 [16] 361
Acquisition 0 0
Disposal (217) 0
Dividends received 0 0
Share of profit (loss) (156) 12
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 373 [16]
Indeck Niles Development, LLC    
Book value    
Beginning balance 302,038 246,273
Acquisition 0 0
Disposal 0 (4,289)
Dividends received 0 0
Share of profit (loss) 32,067 21,975
Other comprehensive income (loss) (3,623) 21,840
Others 4,919 16,239
Ending balance 335,401 302,038
Indeck Niles Asset Management, LLC    
Book value    
Beginning balance 94 111
Acquisition 0 0
Disposal 0 0
Dividends received (337) (497)
Share of profit (loss) 334 472
Other comprehensive income (loss) 0 0
Others 2 8
Ending balance 93 94
Hanwha Corporation-linked Sunlight Power Special Private Equity Investment Trust No. 1    
Book value    
Beginning balance 6,932 7,138
Acquisition 0 0
Disposal (428) (202)
Dividends received (373) (392)
Share of profit (loss) 366 389
Other comprehensive income (loss) (1) (1)
Others 0 0
Ending balance 6,496 6,932
Suwon New Power Co., Ltd.    
Book value    
Beginning balance 919 1,035
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 103 (116)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 1,022 919
KPGE Inc.    
Book value    
Beginning balance 0 309
Acquisition   0
Disposal   (317)
Dividends received   0
Share of profit (loss)   8
Other comprehensive income (loss)   0
Others   0
Ending balance   0
Gwangbaek Solar Power Investment Co., Ltd.    
Book value    
Beginning balance 5,133 4,806
Acquisition 0 0
Disposal 0 0
Dividends received (644) 0
Share of profit (loss) 666 327
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 5,155 5,133
Go deok Clean Energy Co., Ltd    
Book value    
Beginning balance 4,420 4,302
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 303 118
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 4,723 4,420
SureDataLab Co., Ltd.    
Book value    
Beginning balance 177 128
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (63) 49
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 114 177
SEP Co., Ltd.    
Book value    
Beginning balance 0 7
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 (7)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 0
Hankook Electric Power Information Co., Ltd.    
Book value    
Beginning balance 220 [17] 161
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (6) 121
Other comprehensive income (loss) 0 0
Others 0 (62)
Ending balance [17] 214 220
Tronix Co., Ltd.    
Book value    
Beginning balance 66 [17] 109
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 154 (37)
Other comprehensive income (loss) 0 0
Others 0 (6)
Ending balance [17] 220 66
O2&B Global Co., Ltd.    
Book value    
Beginning balance 36 35
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (15) 1
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 21 36
Muan Sunshine Solar Power Plant Co., Ltd.    
Book value    
Beginning balance 2,562 1,268
Acquisition 0 0
Disposal 0 0
Dividends received (340) 0
Share of profit (loss) 600 1,294
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 2,822 2,562
Bigeum Resident Photovoltaic Power Co., Ltd.    
Book value    
Beginning balance 0 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (414) 0
Other comprehensive income (loss) 414 0
Others 0 0
Ending balance 0 0
Goesan Solar Park Co., Ltd.    
Book value    
Beginning balance 2,591 1,927
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 286 664
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 2,877 2,591
Saemangeum Heemang Photovoltaic Co., Ltd.    
Book value    
Beginning balance 13,010 10,238
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 1,410 2,772
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 14,420 13,010
Bitgoel Eco Energy Co., Ltd.    
Book value    
Beginning balance 8,951 4,356
Acquisition 0 3,240
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 3,443 1,355
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 12,394 8,951
Jeju Gimnyeong Wind Power Co., Ltd.    
Book value    
Beginning balance 872 911
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (626) (39)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 246 872
Seoroseoro Sunny Power Plant Co., Ltd.    
Book value    
Beginning balance 859 721
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 82 138
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 941 859
Muan Solar park Co., Ltd.    
Book value    
Beginning balance 7,838 6,083
Acquisition 0 0
Disposal 0 0
Dividends received (2,680) (600)
Share of profit (loss) 1,672 2,377
Other comprehensive income (loss) 0 (22)
Others 0 0
Ending balance 6,830 7,838
YuDang Solar Co., Ltd.    
Book value    
Beginning balance 586 565
Acquisition 0 0
Disposal 0 0
Dividends received (100) (160)
Share of profit (loss) 84 181
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 570 586
Anjwa Smart Farm & Solar City Co., Ltd.    
Book value    
Beginning balance 8,662 6,784
Acquisition 0 0
Disposal 0 0
Dividends received (1,400) 0
Share of profit (loss) 403 1,878
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 7,665 8,662
KPE Green Energy Co., Ltd. (formerly, Daewon Green Energy Co., Ltd.)    
Book value    
Beginning balance 4,485  
Acquisition 0  
Disposal 0  
Dividends received 0  
Share of profit (loss) 3,294  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 7,779 4,485
Daewon Green Energy Co., Ltd.    
Book value    
Beginning balance 4,485 3,877
Acquisition   0
Disposal   0
Dividends received   0
Share of profit (loss)   608
Other comprehensive income (loss)   0
Others   0
Ending balance 7,779 4,485
G.GURU Co., Ltd.    
Book value    
Beginning balance 300 403
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (133) (103)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 167 300
UD4M Co., Ltd.    
Book value    
Beginning balance 161 144
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (11) 17
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 150 161
Dongbu Highway Solar Co., Ltd.    
Book value    
Beginning balance 352 265
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 28 87
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 380 352
Seobu Highway Solar Co., Ltd.    
Book value    
Beginning balance 316 289
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 90 27
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 406 316
Korea Energy Data Co., Ltd.    
Book value    
Beginning balance 62 62
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (26) 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 36 62
Gangneung Sacheon Fuel Cell Co., Ltd.    
Book value    
Beginning balance 4,277 1,878
Acquisition 0 3,745
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 3,593 (1,310)
Other comprehensive income (loss) 0 (36)
Others 0 0
Ending balance 7,870 4,277
KOSTURE Co., Ltd.    
Book value    
Beginning balance 1 [3] 0
Acquisition 6 1
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 1 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance [3] 8 1
Digital Innovation Growth Fund    
Book value    
Beginning balance 0 9,890
Acquisition   0
Disposal   0
Dividends received   0
Share of profit (loss)   (204)
Other comprehensive income (loss)   0
Others   (9,686)
Ending balance   0
Taebaek Gadeoksan Wind Power Co., Ltd.    
Book value    
Beginning balance 20,040 16,495
Acquisition 0 0
Disposal 0 0
Dividends received (3,723) (1,784)
Share of profit (loss) 3,109 5,644
Other comprehensive income (loss) 0 0
Others 0 (315)
Ending balance 19,426 20,040
Chuncheon Green Energy Co., Ltd.    
Book value    
Beginning balance 9,155 3,372
Acquisition 0 6,140
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (204) (357)
Other comprehensive income (loss) (51) 0
Others 0 0
Ending balance 8,900 9,155
Yeomsubong Wind Power Co., Ltd.    
Book value    
Beginning balance 62 [18] 95
Acquisition 1,316 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (507) (40)
Other comprehensive income (loss) 0 0
Others 0 7
Ending balance 871 [19] 62 [18]
Yeongyang Wind Power Corporation II    
Book value    
Beginning balance 7,461 7,965
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 2,639 (504)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 10,100 7,461
Haeparang Energy Co., Ltd.    
Book value    
Beginning balance 2,188 2,241
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (84) (53)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 2,104 2,188
Saemangeum Sebit Power Plant Co., Ltd.    
Book value    
Beginning balance 23,199 [20] 6,000
Acquisition 7,249 7,788
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (709) 4,855
Other comprehensive income (loss) 0 0
Others 7,452 4,556
Ending balance 37,191 [21] 23,199 [20]
Boulder Solar III, LLC    
Book value    
Beginning balance 744 0
Acquisition 0 715
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 0 0
Other comprehensive income (loss) 0 0
Others 10 29
Ending balance 754 744
PlatformN. Co., Ltd    
Book value    
Beginning balance 84 0
Acquisition 0 105
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (84) (21)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 0 84
PT. Cirebon Energi Prasarana    
Book value    
Beginning balance 69,035 [16] 0
Acquisition 0 24,052
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 7,328 35,315
Other comprehensive income (loss) (891) 6,963
Others 1,125 2,705
Ending balance [16] 76,597 69,035
Green Radiation Co., Ltd    
Book value    
Beginning balance 11 0
Acquisition 0 0
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 15 (9)
Other comprehensive income (loss) 0 0
Others 0 20
Ending balance 26 11
Future Convergence Technology Laboratory. Co., Ltd    
Book value    
Beginning balance 50 0
Acquisition 0 76
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (14) (26)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 36 50
Eco motion Co., Ltd. (formerly, SC E&G. Co,. Ltd.)    
Book value    
Beginning balance 214 0
Acquisition 0 90
Disposal 0 0
Dividends received 0 0
Share of profit (loss) 53 124
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 267 214
REC's Innovation Co., Ltd. (formerly, Wang San Engineering. Co,. Ltd.)    
Book value    
Beginning balance 166 0
Acquisition 0 81
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (72) 85
Other comprehensive income (loss) 0 0
Others 26 0
Ending balance 120 [13] 166
ACE    
Book value    
Beginning balance 20 0
Acquisition 0 20
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (18) 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 2 20
Environment and Energy Co., Ltd    
Book value    
Beginning balance 10 [17] 0
Acquisition 0 11
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (1) (1)
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance [17] 9 10
Santiago Solar Power SpA    
Book value    
Beginning balance 13,373 0
Acquisition 0 13,853
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (1,522) (379)
Other comprehensive income (loss) (82) (100)
Others 0 (1)
Ending balance 11,769 13,373
Yanggu Floating Photovoltaic Power Plant Inc.    
Book value    
Beginning balance 903 0
Acquisition 0 903
Disposal 0 0
Dividends received 0 0
Share of profit (loss) (143) 0
Other comprehensive income (loss) 0 0
Others 0 0
Ending balance 760 903
Power Embedded [Member]    
Book value    
Beginning balance 0  
Acquisition 70  
Disposal 0  
Dividends received 0  
Share of profit (loss) 0  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 70 0
Changwon SG Energy Co Ltd [Member]    
Book value    
Beginning balance 0  
Acquisition 900  
Disposal 0  
Dividends received 0  
Share of profit (loss) (117)  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 783 [17] 0
Donpyung Technology Co Ltd [Member]    
Book value    
Beginning balance 0  
Acquisition 125  
Disposal 0  
Dividends received 0  
Share of profit (loss) 154  
Other comprehensive income (loss) 0  
Others (25)  
Ending balance 254 0
HORANG ENERGY Inc [Member]    
Book value    
Beginning balance 0  
Acquisition 4,240  
Disposal 0  
Dividends received 0  
Share of profit (loss) (91)  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 4,149 0
Hoenggye Renewable Energy Co Ltd [Member]    
Book value    
Beginning balance 0  
Acquisition 2,375  
Disposal 0  
Dividends received 0  
Share of profit (loss) 0  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 2,375 0
Haman Green Energy Co Ltd [Member]    
Book value    
Beginning balance 0  
Acquisition 4,771  
Disposal 0  
Dividends received 0  
Share of profit (loss) (1,790)  
Other comprehensive income (loss) 0  
Others 0  
Ending balance 2,981 0
Songsan Green Energy Co Ltd [Member]    
Book value    
Beginning balance 0  
Acquisition 0  
Disposal 0  
Dividends received 0  
Share of profit (loss) 0  
Other comprehensive income (loss) 0  
Others 8,323  
Ending balance ₩ 8,323 [22] ₩ 0
[1] The Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn't started the active selling procedures as of December 31, 2022.
[2] the Company is planning to sell its investments in YTN Co., Ltd. based on the resolution of the Board of Directors on November 23, 2022, but investments in YTN Co., Ltd. are not classified as assets held-for-sale as the Company hasn’t started the active selling procedures as of December 31, 2023.
[3] The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint directors to the board of directors of the entity, and by strict decision criteria of the Company’s financial and operating policy of the board of directors.
[4] The effective percentage of ownership is 100%. However, the Government regulates the Company’s ability to make operating and financial decisions over the entity, as the Government requires maintaining arms-length transactions between KPX and the Company’s other subsidiaries. Accordingly, the entity is not classified as a consolidated subsidiary. The Company can exercise significant influence by virtue of right to nominate directors to the board of directors of the entity.
[5] After additional acquisition of the shares, the effective percentage of ownership is more than 50%. However, the Company does not hold control over relevant business while it exercises significant influence by participating in the board of directors by the shareholders’ agreement. Accordingly, the entity is classified as an associate.
[6] The effective percentage of ownership is more than 50%. However, by the shareholders’ agreement, the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision committee. Accordingly, the entity is classified as an associate.
[7] The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2023.
[8] The Company is planning to sell its investment in SPC Power Corporation, KEPCO SPC Power Corporation, and KV Holdings, Inc. The timing of and proceeds from such sales transaction is not specified as of December 31, 2022.
[9] The effective percentage of ownership is less than 20%. However, the Company can exercise significant influence by virtue of its contractual right to appoint one out of four members of the steering committee of the entity. Moreover, the Company has significant financial transactions, which can affect its significant influence on the entity.
[10] The effective percentage of ownership changed due to the disproportionate capital reduction of financial investors during the year ended December 31, 2023.
[11] The effective percentage of ownership is 34.01% considering the conversion of redeemable convertible preferred stock into ordinary stock.
[12] The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[13] Although the Company’s effective percentage of ownership is less than 20%, the Company can exercise significant influence on the entity through its contractual right to appoint one director to the entity’s board of directors.
[14] The effective percentage of ownership is more than 50% but the Company does not hold control over the entity according to the shareholders’ agreement. Accordingly, the entity is classified as an associate.
[15] Although the Company’s effective percentage of ownership is less than 20%, the entity has been classified as an associate as the Company has significant influence on the entity considering the fact that ordinary resolutions passed at the shareholders’ meeting require the majority decision and the Company has the right to elect the entity’s directors.
[16] The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the decisions related to finance and operation.
[17] The effective percentage of ownership is less than 20%. However, the entity is classified as an associate because the Company exercises significant influence over the entity.
[18] The effective percentage of ownership decreased due to the disproportionate paid-in capital increase, and the effective percentage of ownership is less than 20%. However, the Company exercises significant influence over all decisions related to finance and operation.
[19] The effective percentage of ownership decreased due to the disproportionate paid-in capital increase.
[20] The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2022. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[21] The effective percentage of ownership decreased due to the disproportionate paid-in capital increase during the year ended December 31, 2023. The effective percentage of ownership is more than 50% but the Company does not hold control over relevant business while it exercises significant influence by participating in the Investment Decision Committee. Accordingly, the entity is classified as an associate.
[22] The effective percentage of ownership is more than 50%. However, decisions in relevant activities must be agreed by all ownership parties. Accordingly, the entity is classified as a joint venture.