A pallet shuttle robot can operate in frozen food cold storage, but that answer is only useful after several harder questions are answered.
At -25°C, a warehouse operator will care less about whether the robot can complete a demonstration run and more about what happens after the freezer is full, outbound volume rises, equipment runs for long hours, and maintenance eventually becomes necessary.
READLY's frozen food warehouse project is a good example.
The customer did not start with a new high-bay building designed around automation. Two existing cold rooms were selected for the first stage, each with a clear height of about 9 meters. Refrigeration equipment occupied part of the upper space, so the amount of usable volume was already fixed.
The challenge was straightforward: store substantially more frozen products in the same refrigerated space, while keeping daily pallet movement dependable.
A pallet four-way shuttle AS/RS was selected, but the success of the project depended on much more than whether the shuttle could tolerate -25°C.
Cold Storage Reliability Is Tested Over Time
Low temperature changes the working conditions of almost every moving component.
Battery output, sensors, electrical parts, lubrication, and mechanical assemblies all behave differently in a freezer. That is why cold-storage equipment needs to be designed around the target temperature from the beginning rather than adapted after installation.
For READLY, the shuttle configuration was intended for operation down to -25°C.
What mattered on site was repeatability.
The shuttle had to enter the rack, lift a loaded pallet, travel to the assigned position, stop accurately, and complete the same movement again and again under normal warehouse workload.
A customer evaluating a cold-storage shuttle should therefore ask a very practical question:
Which parts of the machine are actually designed for the specified temperature, and how is long-term low-temperature operation verified?
That tells much more than the temperature printed on a product brochure.
More Storage Only Works if Pallets Can Still Move Fast Enough
The 9-meter building height made storage density a major part of the project.
By moving pallets inside the rack rather than leaving forklift aisles between every row, the two cold rooms were ultimately planned with approximately 3,484 effective pallet positions, roughly three times the previous storage capacity.
But increasing capacity creates another problem.
If the warehouse holds three times as many pallets but retrieval cannot keep up during busy periods, the additional storage becomes a new bottleneck.
This is where the system design becomes more important than the shuttle's top speed.
In READLY's AS/RS, the four-way shuttle handles movement within the storage levels. Pallet lifters handle vertical transfer. WCS coordinates the sequence between them.
A shuttle may finish its route quickly, but if the lifter is occupied, the pallet still waits.
So throughput was not calculated around one robot. It depended on the timing between shuttle tasks, lifter availability, storage location, and outbound priority.
After implementation, overall operating efficiency increased by approximately 60%.
For a frozen food company, this is the number worth discussing. The useful question is not "How fast is the shuttle?" but "How many pallets can the complete system process when the warehouse is busy?"
Frozen Food Safety Also Depends on How Pallets Are Managed
Product safety in a freezer is not only a temperature issue.
Frozen food warehouses may hold visually similar pallets from different SKUs, production dates, or batches. Once inventory grows, incorrect retrieval becomes a real operational risk.
In an automated warehouse, the pallet's physical movement can be linked to its inventory record.
When a pallet enters storage, WMS records what it is and where it has been placed. When an outbound task is released, the system retrieves the required pallet according to the warehouse rules rather than relying on an operator to search for it manually.
READLY's project reached 99.99% inventory accuracy.
For the customer, this means fewer unnecessary pallet movements and better control over which frozen product leaves the warehouse.
There is another cold-chain benefit.
With shuttle robots handling movement deep inside the racks, forklifts and operators spend less time travelling through the freezer. Less unnecessary internal traffic also means fewer operational disturbances inside the controlled low-temperature environment.
Peak Demand Is Where Multi-Robot Systems Are Really Tested
Most frozen food warehouses do not operate at the same rhythm every day.
Holiday demand, restaurant orders, seasonal inventory changes, or customer promotions can create short periods where outbound requirements rise sharply.
A system designed only around average daily volume may look efficient most of the year and struggle exactly when the warehouse matters most.
Four-way shuttle architecture gives the warehouse another option because multiple robots can work in parallel.
WCS can assign work according to current robot position, task urgency, route conditions, and lifter status instead of making every pallet wait for one fixed machine.
This also means capacity planning should include the peak period from the beginning.
How many shuttle robots are required?
Can the lifters handle the combined task volume?
Where are the likely waiting points?
Can another shuttle take over if one vehicle becomes unavailable?
These are the questions that determine whether the warehouse can survive a busy shipping window.
In READLY's project, this coordinated operation contributed to an overall efficiency improvement of about 60%, giving the warehouse more room to absorb higher inbound and outbound demand without turning the transfer points into bottlenecks.
Maintenance Needs to Be Designed Before the Freezer Starts Running
Cold-storage maintenance deserves more attention than it usually gets during equipment comparison.
A technician working at -25°C cannot approach maintenance in the same way as in an ambient warehouse.
Fault location needs to be quick. Components should be accessible. The control system should show which piece of equipment has reported an abnormal condition before technicians enter the cold area.
Multi-robot operation also reduces dependence on a single shuttle.
If one shuttle requires maintenance, unaffected tasks can be reassigned to other available robots where the storage layout allows it. That is very different from a system where one machine failure stops an entire aisle or storage process.
The same thinking applies to pallet lifters and other shared equipment.
A frozen warehouse should be planned around both normal operation and the day when something needs to be repaired.
For a customer running year-round cold storage, maintainability is not an after-sales topic. It is part of the original system design.
What READLY's Project Shows
READLY's project is useful because the cold-storage constraints were real and easy to understand.
The customer had two existing cold rooms with only about 9 meters of clear height.
The operating environment reached -25°C.
Refrigeration equipment reduced the space available above the racks.
The warehouse still needed more capacity, enough throughput for daily operation, accurate inventory control, and less dependence on people working inside the freezer.
The final system provided approximately 3,484 pallet positions, increased storage capacity by about three times, improved operating efficiency by approximately 60%, and achieved 99.99% inventory accuracy.
So yes, a cold storage pallet shuttle robot can be used in frozen food cold storage.
But before choosing one, a frozen food operator should look beyond the temperature rating.
The better questions are whether it can keep running under continuous cold conditions, whether the complete AS/RS can meet peak throughput, whether pallet and batch information remain under control, and how quickly the warehouse can recover when equipment needs service.
Those are the conditions that decide whether a cold-storage shuttle system works well after commissioning-not just whether the robot can run at -25°C.
