v3.26.1
Schedule of summarized financial information (Details) - SEK (kr)
kr in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]          
Revenue kr 263,547 kr 216,484 kr 457,840 kr 388,377  
Net profit before taxation (1,118,055) (887,444) (1,721,676) (967,611)  
Non-current assets 3,000,878   1,392,407 1,501,694  
Current assets 940,951   432,964 247,986  
Total assets 3,941,829   1,825,371 1,749,680  
Current liabilities 2,172,326   1,151,415 784,593  
Non-current liabilities 1,980,498   731,956 952,894  
Total liabilities 4,152,824   1,883,371 1,737,487  
Group’s share in equity - 9% (2024: 9)% kr (210,995) kr 90,275 (58,000) 12,193 kr 690,896
Polar charge AB [Member]          
IfrsStatementLineItems [Line Items]          
Revenue     6,969 4,750  
Net profit before taxation     18,316 3,148  
Taxation     (2,725) (12)  
Net profit for the year     15,592 3,136  
Group’s share in net profit for the year - 9% (2024: 9)%     1,403 282  
Non-current assets     142,592 128,490  
Current assets     8,046 9,648  
Total assets     150,638 138,138  
Current liabilities     3,200 9,316  
Non-current liabilities     2,725  
Total liabilities     5,925 9,316  
Net assets     144,713 128,822  
Group’s share in equity - 9% (2024: 9)%     kr 13,024 kr 11,594