During a discussion on the EU-Ukraine energy partnership and cooperation, Polyakova said that, in the wake of Russia's invasion, renewable energy became critical for energy security in Ukraine and for the decentralization of its energy system.
"Since last summer, the possibility of self-supply and self-generation has been extremely important for Ukrainian households," Polyakova told Radio Poland's Danuta Isler.
"It is now a matter of energy security in its direct sense," she added.
The Warsaw conference was held by Polish think tank Forum Energii and the European Council on Foreign Relations (ECFR).
Click on the audio player above to listen.