The move is “essential” for the delivery of Britain’s net-zero goals and strengthening energy security, government ministers say.
Climate Change Minister Graham Stuart signed the preliminary agreement on Sunday.
It enables the UK to work with the North Seas Energy Co-operation, which includes the European Commission, to develop renewable projects, specifically those linking energy grids and windfarms.
The agreement represents a renewal of Britain’s relations with the NSEC after Brexit.
The UK will not regain its membership, but the European Commission said it would benefit from a “privileged framework for co-operation”.
Green energy sources - in pictures
The initiative is expected to support the UK’s targets to increase offshore wind fivefold to 50GW and deliver 18GW of electricity interconnector capacity, up from 8.4GW today, by 2030.
“I’m pleased to agree even greater energy co-operation with our North Seas neighbours, which will be vital in helping the UK meet its ambitious renewables target," Mr Stuart said.
“The development of renewables in the North Sea is critical for accelerating our clean transition and boosting energy security for the UK and our European neighbours.”