How much hydro electric power could Iceland produce if it went into top gear exporting electricity (as hydrogen or whatever) to the rest of the world?

I can understand Skarpi (or any Icelander) having an interest in this as Iceland has very few exports - energy, fish and tourism are almost all it has. Fish is in danger of running out, while energy prices are likely to rise, so it's easy to see where they're heading for the future.

Anahata