A generator set, also called a Genset, is a diesel power generator used as a mobile power source for refrigerated containers. The genset provides the electricity that is needed to run the cooling motors during transport, and through the use of this engine, you can keep your perishable cargo safe from spoilage throughout the journey.
How a Reefer Genset Works?
To keep your cargo safe, you need to know how gensets work. A genset acts as your own portable power supply; it fills the gap when you move a container away from the port’s power grid.
Its Components
- Diesel Engine: This is the main power source. It burns fuel to create energy and keep your cooling system running.
- Alternator: This part of the genset is responsible for turning the mechanical engine’s power into 460V electricity that the cooling unit needs.
- Fuel Tank: A large tank that holds the diesel fuel to supply power to the genset.
- Control Panel: This is the brain of the unit that assists the user in checking the fuel level, the status of the engine, and the power output.
Operation
Everything starts when you mount the genset to your container or trailer and plug it into the reefer’s power cable. Once you start the engine, the alternator generates electricity that copies the power found at ports.
This mobile grid allows you to keep the compressor and fans running continuously while the container is on a truck or train. Through this, the system maintains your exact temperature set point, regardless of the outside temperature.
Energy Efficiency
The modern units help you save money by using smart technology. Instead of running at full speed at all times, the engine slows down once your cargo reaches the target temperature. This design helps minimize fuel use while keeping the engine from wearing out too quickly on long hauls.
Types of Generator Set
There are different types of generator sets. Choosing the ideal one is important for an efficient cold chain. These generator sets are compatible with many different types of reefer containers and other temperature-controlled units.
Underslung Gensets
Underslung gensets are heavy-duty power units designed to mount directly to the bottom of a container chassis. They are the ideal choice for dedicated trailer fleets or local transport routes where a permanent power solution is needed. By attaching it under the frame, it keeps the front of the reefer container clear. It lets you access the cooling unit more easily.
Modern underslung units are built with high ground clearance to protect the engine from road debris while keeping the trailer stable.
Clip-On Gensets Units
Clip-on units are a special type of power source designed to clip securely onto the front upper corner casting of a refrigerated container. Unlike chassis-mounted models, these units stay with the container itself rather than the trailer. This makes them the perfect solution for intermodal transport, where the cargo may move from a ship to a train or truck without losing power.
Their plug-and-play design allows for fast installation and removal. This function gives the fleet manager the flexibility to move the power source to whichever shipment needs it most.
On-Chassis Gensets
On chassis gensets are side-mounted power units that attach to the side rail of the trailer frame. While underslung units sit centrally beneath the trailer, these are positioned on the side for maximum accessibility. This placement is ideal for operators to access the control panel or monitor fuel levels frequently without crawling under the vehicle.
On-chassis gensets are preferred when specific ground clearance requirements or chassis designs prevent the use of a standard underslung mount. This type provides an easy-to-service power source for long-haul trips.
Why Do You Need a Generator Set?
A generator set is needed because a reefer container requires a continuous electrical supply to work. You need a genset to provide power when your refrigerated container moves between places that do not have electrical access.
Here is how a genset for reefers supports your logistics needs.
Long Haul Trucking
Acts as a portable power plant to keep your temperature-controlled unit running while in motion.
Rail Transport
Maintains temperature integrity on railcars that lack an onboard power system.
Emergency Backup
Provides a vital energy supply during power outages or equipment malfunctions.
Temperature Stability
Prevents inconsistent temperatures that could spoil cargo by providing continuous and stable power.
Enhanced Cargo Safety
Protects high-value, sensitive shipments such as medicines or fresh food.
Compliance
You can use a genset to meet strict regulations that state the required temperature for your cargo. Using these units helps you adhere to the rules set by groups like the FDA.
Flexibility
Gives you the ability to keep your cargo powered anywhere, even if there are route changes.
Maintenance and Safety
Keeping your equipment in good condition is important for smooth operation. You may do these steps to manage the upkeep of your units.
Pre-trip Inspection
You should always check your genset before transport. Check the oil and the connections for leaks, and test the battery to avoid issues while on the road. Doing these helps you find small problems before they lead to cargo loss during your shipment.
Safety Protocols
Safety rules should be strictly followed when you handle high-voltage equipment. Always turn off the unit before you perform any maintenance or refueling tasks. This gives you safety while you work around your temperature-controlled unit.
Log Operating Hours
You can track the use of the unit by recording its total running time. By tracking the operating time, you stay informed of changes and replacements. Keeping a clear log helps you plan so your cargo stays protected on every trip.
Overall
Managing your generator sets correctly is important to keep a successful cold chain. By choosing the right unit and following regular maintenance, you protect your cargo from damage. These power sources give you the ability to transport goods without losing temperature control.
Using a genset also helps you follow strict industry standards while also keeping a smooth operation for every shipment.
People Also Asked:
What is the purpose of a genset?
A genset provides continuous electrical power to your reefer container. It acts as a portable power source when you move goods between locations that do not have access to the electrical grid.
What happens if I use a reefer container without a genset?
A refrigerated container cannot cool itself without electricity. If a container makes a transport without a genset or a grid connection, the cooling unit will stop, which can then spoil your cargo.
How much does a genset for a reefer container cost?
You can expect the cost to vary based on whether you buy or rent and the unit type you choose. Buying a new unit typically costs between $12,000 and $18,000.
If you prefer used equipment, refurbished units usually range from $4,000 to $9,000. For short-term needs, rental rates are approximately $100 to $150 per day.
How long can a genset run continuously?
Most units can run for 2 to 5 days before they need more fuel. This depends on the fuel tank size and the cooling needs of your cargo. You can monitor these through a log to help you plan for refueling and maintenance.
Does a genset require manual starting?
Many modern units feature automatic start functions, though some older models have manual controls. You can set these newer systems to turn on automatically when your temperature-controlled unit needs power.
You should always check the control panel during your pre-trip inspection to see which starting method your specific unit uses.
You might also find these blog posts useful:
How to Rent a Reefer Container?
Reefer Container Guide: Common Problems and Easy Repairs
How Many Pallets Can You Fit Inside a 40ft Reefer Container?
About The Author
Evan Wang
I am Evan Wang, the General Manager, Marketing Director, and SEO Expert at Sunnyda Cold Room. I have over 20 years of experience in the refrigeration industry, and my expertise is in commercial refrigeration solutions.
I’d be delighted to share practical ideas about refrigeration products, project selection, export trade, SEO, and marketing.
Let’s connect!
