Batteries, solar, PoE and backup. Runtime declared in hours of measurement, not in generic watt-hours.
Measuring from the car at mobile stations.
Floors with no power and 40 m extension leads.
Keeping the measurement alive through mains dropouts.
Stations that run for months with no mains supply.
One cable for data and power.
The cable that takes on water halfway through the campaign.
Runtime declared in hours of measurement, not in generic watt-hours.
Knowing why the station shut down at three in the morning.
Sized on the station's real consumption, not on a guess.