Which Robot Choice Fits Cold Storage Freezer Picking Versus Pallets?

Which robot choice fits cold storage freezer picking versus pallet work?

The first decision in a cold storage operation is which freezer task uses the most cold time, not which robot model to lease. Your crews work two hours at a time in freezers, so the question is whether that time goes to picking, to moving pallets, or to walking between the two. Those tasks call for different robot types, and mixing them up is the most common way a pilot goes wrong.

For pallet moves, the realistic candidate is an autonomous mobile robot, often called an AMR, or an autonomous forklift, since both carry pallets along mapped routes. For picking, the answer is less settled. Robots can carry goods or totes to a person, but reaching into packed cases on racks inside a freezer is a harder problem, and I would not expect it to remove people from the cold soon.

Start by splitting your two hours into picking time and pallet time, then ask which slice you could move out of the freezer. That is a better first step than comparing models, because it tells you which robot class to evaluate and which to drop.

Keep the two lists separate from the start. Picking work includes walking to locations, reading labels and building cases. Pallet work includes staging, moving full pallets and returning empty ones. A robot that handles one list does nothing for the other, and a plan that blends them will look like it saves more time than it does.

How large is cold storage, and where do freezer crews fit in it?

Cold storage is large in total but hard to count site by site. According to the Global Cold Chain Alliance 2026 Top 25 list, as reported in a trade publication, global top-25 cold storage capacity reached 7.76 billion cubic feet in 2026, up 6.3% year over year. That is an operator total, not a facility count, so it shows market growth rather than how many sites look like yours.

An older count is more granular. According to the International Institute of Refrigeration, its 2020 report counted 912 refrigerated warehouses worldwide and put the United States at 156 million cubic metres, the largest single country market. That is a 2020 figure, so use it for scale, not for present totals. I did not find a verified recent count of U.S. cold storage facilities.

For your planning, the national count matters less than the layout of your own building. Your 35,000 square feet may hold several freezer rooms, and the doors between them, the distance from racks to doors, and the staging space at each door decide whether a robot can run a loop or needs a route a person must restart.

Think in terms of exposure. One large freezer room is a different job from several smaller ones, because each door is a point where a robot has to cross a threshold, change temperature zones, and keep its sensors working. Count the rooms, the doors and the staging space before you count robots.

How many freezer hours do pallet moves and picks really take?

Your two-hour freezer shift is the figure to work from, and it comes from your operation, not from a study. No verified benchmark for hours per task in cold storage turned up in this research, so the time split has to come from your own records.

Walk one shift with a timer for each task. Log when a person crosses the freezer door, when they walk to a pick, when they move a pallet and when they stop for a warm-up break. Two weeks of that log will show you more than any estimate from a vendor.

The table below sorts the work by task so you can see where a robot changes cold time and where it does not. The aim is to find the tasks that cost the most cold minutes, not to promise a set number of hours saved.

Include the non-robot work too. Cleaning, inventory counts and temperature checks also take time in the freezer, and each may suit a separate robot class. Capture them in the same log, because a robot that solves one task can leave another in the cold.

Why is freezer picking harder to automate than moving pallets?

Pallet transport is the more mature use case. In the 2025 Industry Outlook Survey on warehouse automation, about 10% of companies said they use AGVs or AMRs, and 30% planned to evaluate them within one to two years. Those figures cover general warehousing, not cold storage, and one edition of that survey reported 110 qualified respondents, so read them as direction, not proof.

Robot arms are less common. The same survey reported that about 13% of companies use robotic arms or industrial robots, up from 10% the prior year, and that 32% plan to evaluate them. Adoption is rising, but that does not mean an arm can reach into mixed cases on a rack in a freezer at a dependable pick rate.

Picking is hard for reasons that show up in a freezer: frost on sensors and grippers, gloved hands, and cases packed and labeled in ways a camera has to read. A person in the freezer stays the more flexible picker. The side-by-side table below lays out where each one wins.

Ask any vendor for references in cold storage specifically. A demonstration in a warm warehouse tells you about navigation, not about frost, battery draw or gloved handling. Ask for a demonstration at your freezer temperature, and ask who services the unit when it fails in the cold.

What should a freezer-rated robot be checked for before any test?

Freezer-rated is a claim to verify, not a label to accept. Ask for the operating temperature range in writing and check that it covers your freezer, not just a cooler. Batteries and sensors are the two parts most sensitive to cold, so the rated range should appear in the specification for both.

Battery life drops in cold, which changes how long a unit runs between charges. Plan charging outside the freezer, in a warm area, and count charge time as part of the shift. A unit that runs a full shift in a warm test may need a planned charge partway through a cold one.

Floors and doors matter as much as the robot. Condensation and ice on the floor, door thresholds, and changes in pallet height can all stop a route. Map the route with actual pallet positions rather than the floor plan, and test it on a shift you actually run, not on a quiet morning.

Compare the stated range with the coldest and warmest spots in your freezer, not the setpoint on the wall. Air in large rooms is rarely uniform, and corners near evaporators or doors can differ from the average. Measurements at those points tell you whether the specification applies to your building.

Does a robot cut cold exposure, and what do the rules still require?

A robot takes no warm-up breaks, but the people who still enter the freezer do. According to the U.S. Bureau of Labor Statistics industry page for warehousing and storage (NAICS 493), the 2024 total recordable case rate was 4.8 per 100 full-time workers. Cases with days away, job restriction, or transfer were 4.1, and days-away cases alone were 1.5. Those figures cover all warehousing, not freezer work alone.

Refrigerated warehousing has its own figures, but they are weaker. A safety training article, citing BLS data, gives 3.4 recordable cases per 100 full-time workers for refrigerated warehousing and storage in 2024. I could not check that against the BLS table, and another page gives 5.5 with no year, so I would not use either without the primary table.

OSHA has no specific cold-stress standard, but its guidance is consistent on the basics. According to a secondary summary of that guidance, it recommends the following.

• Frequent warm-up breaks in a warm location
• Training for supervisors on cold stress
• Gradual acclimatization for workers new to the cold
• Monitoring workers for signs of cold stress

How do staffing shortages and turnover change the robot case?

A figure of about 49 percent turnover shows up often in warehouse statistics, attributed to 2023 BLS data. A warehouse statistics article repeats it, but I could not confirm that attribution, so keep it out of any budget memo. Use your own turnover records for freezer roles and count how many shifts you covered with overtime last quarter.

Turnover in freezer roles matters because each new hire needs cold-stress training before a first shift. If training and churn take a meaningful share of the year, a robot that stays on the job can change the staffing math, but only for the tasks it actually covers.

The safest way to use this section is to test one route before a whole-site plan. A pilot on one pallet route, with a measured log, tells you more than any national turnover figure, and it keeps the cold exposure question contained while the crew learns the system.

Consider the shift pattern too. Two-hour freezer work often means staggered crews, so a robot that runs during the gaps can keep pallets moving without asking someone to enter the cold. Note which hours carry the most pallet movement and whether the robot would cover them.

How do we move from a freezer task list to a quote?

We are an OEM-neutral integrator for US businesses. We pick the right robots across manufacturers, then lease them through financing, deploy and integrate them, train staff, and service every unit under our service plan, backed by regional service engineers in each state we service. One partner covers the whole lifecycle, so you do not have to coordinate several vendors for one freezer.

Robots are leased through financing, and the payment comes in a quote after a free site assessment. That assessment is where we check the freezer rating, the pallet route, the charging location and the backup plan, which are the same points in the checklist below. A fixed robot lease payment only means something once those points are settled.

If you want to test before committing to a full site, ask for a pilot with one leased unit on one pallet route. Measure the cold minutes before and after, and let that log decide whether to expand.

Bring three things to the site visit: your freezer task split between picking and pallet work, any cold-minute logs you already have, and a sketch of doors, freezer rooms and staging points. The more of that you bring, the more precise the quote can be.