cooling capacity

size

power consumption

But in outdoor / harsh environments, many failures come from internal architecture + component choices, not from the nameplate.
What this cutaway + component views highlight (3 reliability drivers):

Core refrigeration module (compressor system stability)

Your capacity may be correct, but long-term reliability depends on stable operation under 24/7 load—protection strategy, oil return conditions, and tolerance to high ambient stress.
Airflow module (fans )

In sealed cabinets, airflow is the heat highway. If airflow drops (dust buildup, bearing wear, blockage), cabinet temperature can rise quickly—triggering alarms and accelerating aging.

Environment interfaces (seals, coatings, drainage paths)
Outdoor performance is often lost through small gaps and long-term exposure—dust, humidity, salt air, and rain.

   Capacity tells you if it can cool today. These details decide if it can last for years.