https://www.mro-network.com/maintena...56298bcc40bc30
A few quotes from the article:
Rather than the 400-Hz AC electrical ground power used by generations of aircraft, the F-35 uses 270-volt DC power. Its systems, including its electrically powered flight controls, require more power than previous fighters.“The F-35 is a very smart aircraft,” says Bryan Bullerdick, CEO of North Carolina-based design and equipment supplier B GSE Group, which has worked on most of the extant F-35 hangars. He explains that if the power provided to the F-35 is not the perfect voltage, amperage or harmonics, the aircraft will not turn on when the ground crew needs to perform functional checks. Centralized electric power systems with long, sensitive supply cables do not work. Not only is such cabling a vulnerable obstacle, the DC current it provides degrades over distances.
Accordingly, in each F-35 hangar work is done above service pits—under-floor spaces from which electric power, cooling and other services are provided at the aircraft, obviating the need to run cables from remote inverters/converters.
...and...
Cooling is another issue. The F-35’s multiple electronic systems generate significant heat. During maintenance, the fighter requires preconditioned air (PCA) cooling at just the right temperature. The air must be very dry at a higher pressure than standard commercial PCA. Sending cool air from specialized high-pressure air conditioners through an underground trunk line which is ducted off to individual service pits is one way to ensure proper cooling.
I am ignorant but it doesn't sound very expeditionary.