Charging hardware is largely designed and certified in climates that do not have a monsoon, a forty-eight degree afternoon or a dust season. It works here, but it fails in patterns, and the patterns are seasonal enough that you can staff and stock against them.
Heat: the failure that does not look like a failure
DC chargers derate when internal temperatures rise. A unit rated at 60kW delivering 38kW at three in the afternoon is behaving exactly as designed and costing you a third of your throughput at the hour that matters most.
- The signature is a session-length distribution that stretches through the afternoon and returns to normal after dark.
- Shade is the cheapest intervention available. A canopy over the unit — not just the parking bay — routinely recovers most of the loss.
- Filters clog. A quarterly clean on the intake is a fifteen-minute job that prevents a heat-related derate becoming a heat-related shutdown.
- Watch for the unit that never derates in a hot fleet. It usually means the temperature sensor is not being reported, not that the unit is cooler.
Water: three ways in, all preventable
Ingress complaints spike within two weeks of the first heavy rain, and the causes are consistent: cable glands not tightened at installation, enclosure doors not sealing because the gasket was pinched, and — most often — conduit entering the enclosure from above so water runs down it into the cabinet.
All three are commissioning defects that surface months later. A pre-monsoon inspection round, done once a year in May, catches nearly all of them while the fix is still a screwdriver rather than a replacement board.
Dust: the connector problem
Dust ingress into connectors raises contact resistance, which shows up as heating at the plug, which shows up as sessions terminating early. Drivers report it as "the charger keeps stopping" and the charger reports nothing unusual, because from its perspective nothing unusual happened.
Holsters that actually hold the connector off the ground fix most of it. Where they have been broken off — which happens — replacing them is a far better use of a visit than cleaning contacts repeatedly.
Plan the calendar, not the incident
| Month | Work | Prevents |
|---|---|---|
| February | Filter clean, shade check | Summer derating |
| May | Pre-monsoon seal and drainage round | Ingress failures in July |
| September | Post-monsoon earth and corrosion check | Slow-developing faults through winter |
| November | Connector and holster replacement round | Dust-season contact resistance |
Four rounds a year, each cheap, each preventing a category of fault that would otherwise arrive as an emergency on the day the site is busiest.