https://forum.awesystems.info/t/an-alternative-method-to-tap-high-altitude-winds/949/14?u=pierreb
See the “Table 5 Reference photovoltaic plant considered for hydrogen production”.
As the photovoltaic plant is onboard, some dangerous handling can be avoided.
All things considered Long permanence high altitude airships: the opportunity of hydrogen is an interesting track for all AWES.