Some 745 population centres, or 579,200 customers, have remained cut from power due to hostilities, the national atomic company Energoatom has said on Telegram.
Around 346,000 in Donetsk Region, over 128,000 in Luhansk Region and nearly 35,000 in Kharkiv Region are affected.
According to Energoatom, nearly 185,000 customers have lost gas supply.
Repair crews are doing the best to restore power supply.