IN Brief:
- Evergreen is operating around 58,000 reefer containers equipped with IoT monitoring technology.
- Connected units transmit location, temperature, humidity, equipment status, and exception alerts in real time.
- Variable-speed compressors, predictive maintenance, and controlled-atmosphere systems extend the technology beyond basic temperature monitoring.
Evergreen Marine is operating around 58,000 refrigerated containers equipped with Internet of Things technology, extending continuous condition monitoring across a large part of its global reefer fleet.
The connected units transmit location, temperature, humidity, and equipment status in real time, while alerts can flag temperature deviations, unauthorised door openings, and equipment faults. The system gives operations teams a continuous record of container conditions during transit rather than relying on isolated checks at terminals, depots, or destination.
Evergreen is also using data from the fleet for remote diagnostics, allowing potential equipment problems to be identified before a failure develops into a cargo claim or forces emergency intervention. The approach supports preventive maintenance on equipment that may spend weeks moving between vessels, ports, depots, and inland transport legs.
The scale of the deployment is notable because reefer telematics have moved well beyond pilot use. Evergreen’s 2023 sustainability reporting said the company procured 2,000 reefers with remote monitoring systems that year and planned to install IoT capability on more than 27,000 existing units, with the longer-term aim of extending connectivity across the fleet.
Cold chain control expands beyond temperature
The monitoring programme sits alongside Evergreen’s use of controlled-atmosphere reefer technology for fresh produce. Controlled-atmosphere systems regulate oxygen and carbon dioxide concentrations inside the container, slowing ripening and deterioration during longer voyages and helping sensitive cargo retain quality over extended transit times.
Temperature remains the basic control variable, but humidity, door status, machinery condition, and location data add context when an exception occurs. A temperature deviation recorded alongside compressor status and container position gives a different operational picture from a single out-of-range reading discovered only after arrival.
That broader data set can also improve incident investigation. A reefer dispute that once depended on set-point records and occasional terminal checks can now be examined against a continuous timeline showing where the container was, how its internal conditions changed, and whether the refrigeration system was operating normally at the time.
Connected monitoring does not remove physical risk. Compressors still fail, electrical supply can be interrupted during terminal handling, doors can be opened unexpectedly, and cargo can be damaged by an incorrect set point. The difference is that the network has more information available while the shipment is still moving and, in some cases, enough warning to intervene before the problem reaches destination.
That capability is particularly relevant on long, multi-port services. Refrigerated cargo can pass through several handling environments, power connections, and transshipment points before delivery, so a location-aware alert can help identify where an abnormal condition is developing and whether inspection or repair is possible before the next leg.
Efficiency becomes part of reefer specification
Evergreen is also introducing variable-speed compressors on newer reefer units. Instead of operating at a fixed output whenever cooling is required, the compressor can vary its speed to match the cooling load, reducing energy use while maintaining the specified internal conditions.
The efficiency gain matters across a large fleet because refrigerated containers draw power at sea, in terminals, and at depots. Energy performance therefore becomes part of the operating cost of the cold chain, while equipment data can be used to compare how units perform over time rather than treating every reefer as an identical asset.
There is a maintenance consequence as well. Remote diagnostics can help operators distinguish between a cargo-condition problem and an equipment problem, allowing engineering attention to be directed at units showing signs of deterioration rather than waiting for a failure to become obvious during inspection.
Cargo owners can use the more detailed operating record for faster exception handling and clearer post-voyage evidence, particularly for food, pharmaceuticals, and other temperature-sensitive goods. Claims teams can also distinguish more precisely between prolonged temperature excursions and short handling events that remained within cargo tolerance. The value of that visibility still depends on response procedures across carriers, terminals, depots, and customers; an alert has limited value if nobody can act on it before the next handover.
Evergreen’s 58,000 connected reefers show that smart cold chain equipment is becoming fleet infrastructure rather than an optional premium service. The next operational measure is whether carriers can turn the additional data into fewer cargo excursions, faster maintenance decisions, and more consistent intervention across the many handovers that still define refrigerated transport.
