US Vice-President Kamala Harris has pledged a $1.5bn (£1.18bn) package of aid to Ukraine, mostly for the country’s energy sector.
The funding, announced at a Ukraine peace summit in Switzerland, will help repair infrastructure damaged by Russian bombardments.
Ukrainian President Volodymyr Zelensky said on Tuesday that half of the country’s power-producing capacity had been destroyed in the war.
He has called on Western countries to provide more air defences to protect both energy infrastructure and urban population centres, and some have responded.
Russian attacks on the power grid have forced energy companies to institute rolling blackouts.
Many Ukrainians are relying on generators
The package, from USAID and the State Department, includes $500m of new money for energy assistance and $324m redirected for emergency energy needs, a White House statement said.