  As global demand for green hydrogen rises, potential hydrogen exporters move
into the spotlight. However, the large-scale installation of on-grid hydrogen
electrolysis for export can have profound impacts on domestic energy prices and
energy-related emissions. Our investigation explores the interplay of hydrogen
exports, domestic energy transition and temporal hydrogen regulation, employing
a sector-coupled energy model in Morocco. We find substantial co-benets of
domestic climate change mitigation and hydrogen exports, whereby exports can
reduce domestic electricity prices while mitigation reduces hydrogen export
prices. However, increasing hydrogen exports quickly in a system that is still
dominated by fossil fuels can substantially raise domestic electricity prices,
if green hydrogen production is not regulated. Surprisingly, temporal matching
of hydrogen production lowers domestic electricity cost by up to 31% while the
effect on exporters is minimal. This policy instrument can steer the welfare
(re-)distribution between hydrogen exporting firms, hydrogen importers, and
domestic electricity consumers and hereby increases acceptance among actors.
