It’s starting to become increasingly common - there’s a project in the offing to run a cable from Morocco to the UK to take advantage of all that Saharan sunshine. There’s long been talk of stringing a few across the Med and building large numbers of solar farms across North Africa to speed up the green transition in Europe (at one point there was talk of worried insurance companies bankrolling such projects as climate change could bankrupt them). Eventually there will be a web of such cables into and across Europe shuttling energy around - excess British being stored in Norwegian HEP facilities, etc.