Norway doesn't have enough interconnection capacity to do that. And even if it did, the real issue is how to supply power when the sun don't shine and the wind

Norway doesn't have enough interconnection capacity to do that. And even if it did, the real issue is how to supply power when the sun don't shine and the wind don't blow, i.e. windstill winter days. During such periods Norway does not have sufficient excess in hydro power generation to satisfy neighboring countries needs.