The law significantly raises the EU's renewable energy targets, requiring 42.5% of EU energy to be renewable by 2030, replacing a current 32% target for that date.
It faced a tough passage through negotiations among EU countries' governments, and only secured support after France won carve-outs for nuclear energy - which is low-carbon, but not renewable.
EU countries and lawmakers had negotiated a deal on the renewable energy law in March which was supposed to be final, but was held up by countries seeking greater recognition of nuclear power.
A Commission spokesperson said on Tuesday it was aware of the difficulties and was in touch with renewable energy manufacturers to discuss possible solutions.
Europe got 22% of its energy from renewable sources in 2021, the latest year for which official EU data are available.
Persons:
Pascal Rossignol, Markus Pieper, Pieper, Kate Abnett, Ed Osmond, David Evans
Organizations:
REUTERS, Rights, Union, France, European, EU, Thomson
Locations:
Bevillers, France, Rights BRUSSELS, EU, Brussels, China, Europe