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(11)

EP 4 771 724 A1

(12)

(43) Date of publication: 08.07.2026 Bulletin 2026/28 (21) Application number: 24772004.8 (22) Date of filing: 27.08.2024

(51) International Patent Classification (IPC):  H02J 3/00(2026.01) H02J 9/06(2006.01) H02J 13/00(2026.01) (52) Cooperative Patent Classification (CPC): H02J 3/001; H02J 9/06; H02J 3/46; H02J 4/25; H02J 13/12 (86) International application number: PCT/FI2024/050443 (87) International publication number: WO 2025/046170 (06.03.2025 Gazette 2025/10)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 01.09.2023 FI 20235981 (71) Applicant: Elisa Oyj 00520 Helsinki (FI)	(72) Inventors: HOLMBACKA, Simon 00520 Helsinki (FI) SALMENKAITA, Jukka-Pekka 00520 Helsinki (FI) (74) Representative: Papula Oy  P.O. Box 981 00101 Helsinki 00101 Helsinki (FI)