The 27 are expected to back an alternative price benchmark for liquefied natural gas and joint gas buying, after earlier agreeing to cut consumption and introduce levies on windfall profits in the energy industry.
But they remain as split as they were months ago on whether and how to cap gas prices to stem high inflation and stave off recession, after Russia cut gas flows following its invasion of Ukraine.
They will also discuss emergency spending to mitigate the effects the acute energy crunch has on their economies and 450 million citizens.
But given EU countries' diverse energy mix and interests, the meeting risks falling short on concrete action, with other concerns being whether a gas cap would enable Britain to buy cheaper energy or compromise stability of supplies.
EU energy ministers meet again next week but another senior EU diplomat said they did not expect more detailed decisions before November.