[ephbit]

Even with HVDC I'm very sceptical that we'll soon see enough transmission capacity (electrical) from northern africa to europe or other regions in the world for that to become a relevant part of the eurafrican grid.

Why? Because we'd need lots of these.

Take this project as a reference: https://en.wikipedia.org/wiki/Southern_Hami%E2%80%93Zhengzho...

Capacity: 8 GW Cost: ~ 3 billion EUR

Assuming 10 kW each, with one such HVDC connection you could charge/discharge 800000 cars simultaneously. That is quite a lot less than the current number of cars and 10 kW is a lot less than the charging speeds which are currently being offered.