Well, there are 350 amps of additional (surplus to needs) electrical power available now on every Series 400 aircraft produced. If a customer needs more power than that (perhaps they plan to run an electric-arc blast furnace installation in flight)
, we can provide higher amperage generators, because this is consistent with what I said earlier: All of the "special options" that de Havilland ever offered - this includes additional electrical capacity - are available from Viking on new build aircraft.
Seriously, though, electrical power needs on aircraft (of all types) to run comparable types of equipment have been steadily declining over the past 30 years. My guess is that an aircraft fitted with survey, photographic, or research equipment today would require far less electrical power than an aircraft fitted with similar capability equipment 30 years ago.
Michael