National power grid operator Ukrenergo said several hours earlier that 30% of electricity supplies were still out, and asked people to cut back on their energy use. "Repairs crews are working around the clock," it said in a statement on Telegram.
Zelenskiy went to the town of Vyshhorod just north of Kyiv on Friday to look at a four-storey building damaged by a Russian missile. He also visited one of the many emergency centers that have been set up to provide heat, water, electricity and mobile communications.
"Together we will be able to go through this difficult path for our country. We will overcome all challenges and we will definitely win," he said in an earlier video statement.
Moscow says the attacks on basic infrastructure are militarily legitimate, and that Kyiv can end the suffering of its people if it yields to Russian demands. Ukraine says attacks intended to cause civilian misery are a war crime.
The European Union will step up efforts to provide Ukraine with support to restore and maintain power and heating, the head of the European Commission said.
Russia insists it does not target civilians in the "special military operation" it launched in late February. International human rights officials say that is difficult to reconcile with attacks on civil infrastructure.
"Millions are being plunged into extreme hardship and appalling conditions of life," U.N. human rights chief Volker Turk said in a statement.
Moscow says it launched its operation in Ukraine to protect Russian speakers in what President Vladimir Putin has called an artificial country carved from Russian territory.
"Russia is first and foremost about people, their culture, their traditions, their history, which is passed down from generation to generation and absorbed with mother's milk," he said during a televised meeting with mothers of soldiers.
Putin said he shared the women's' pain, telling them that "the main guarantee of our success is our unity."
