It really depends on how much excess capacity the north south interconnects have. You'll have to store the energy where it is produced and then get rid of it wh

It really depends on how much excess capacity the north south interconnects have. You'll have to store the energy where it is produced and then get rid of it when the windfarms are not producing (and there's demand in the south). I'm sure someone did the math on this and it is not economical at the moment, otherwise this would have been lower hanging fruit than adding interconnects.