An Alderney States member has told ITV News residents protesting against the FAB link project are "protesting against the island's future".
The scheme would see Alderney used as a connection point for transferring energy between France and the UK, with an electrical converter station being built on the island.
Ian Tugby says those opposed to the scheme should "think of the younger generation".
He says the project will an essential economic boost to a struggling economy.
Islanders have protested the idea in the past, with around 150 people taking part in a demonstration against the plans last September.
Last week, it was decided that islanders would be given the chance to vote on the proposals, though the States will not necessarily listen to the result.