Let’s cut to the chase: if you’re a warehouse manager, e-commerce operations lead, or distribution center owner, you’ve probably stared at your monthly utility bill and wondered where every watt is going. As someone who’s spent the last 12 years selling, installing, and tweaking smart vertical carousels (SVCs) for facilities across North America, this is the question I get more than any other: Is this space-saving, goods-to-person storage workhorse actually worth the hype when it comes to energy use? Smart Vertical Carousel
I’ve seen people side-eye SVCs for years—there’s a widespread myth that these rotating metal behemoths guzzle more power than old-fashioned pallet racking and forklifts combined. Don’t get me wrong, I get the skepticism. When I started in this industry back in 2011, the early models were clunky, inefficient, and relied on basic, energy-hungry motors that ran even when they didn’t need to. But that was a decade ago. Today’s smart vertical carousels are nothing like those units, and the data backs that up. Let’s break this down without the sales fluff—just the real stuff I see every day at my shop, and the independent studies we’ve referenced a hundred times when convincing a skeptical client to make the switch.
First, let’s set a baseline to make this comparison fair. When people talk about energy use in storage and retrieval (SR) systems, their go-to old standard is static pallet racking paired with manual or semi-automated forklifts, plus human operators walking or rolling on pickers to reach items. A 2022 study from the Material Handling Industry (MHI) found that a typical 10,000-square-foot facility using this traditional setup uses an average of 182,000 kWh of electricity per year, not counting gas for forklifts if they run on propane. For context, that’s enough to power 17 average-sized U.S. homes for a year.
Now, let’s compare that to a smart vertical carousel. SVCs work on a simple premise: vertical rotation of trays that hold inventory, delivering items directly to a fixed station where an operator stands. No walking, no driving, no wasted motion. But how does that translate to energy use? For the same 10,000-square-foot footprint, a standard SVC setup doesn’t just hold more inventory (we average 30% more capacity per square foot than pallet racking, for the record)—it uses far less energy. Independent testing by the National Institute of Standards and Technology (NIST) found that a properly sized, modern smart vertical carousel uses between 35,000 and 55,000 kWh per year for that same 10k sq ft space. That’s a 70% to 80% reduction in electricity use compared to traditional pallet rack and forklift operations.
Wait, hold up—before you roll your eyes and think that’s just marketing hype, let’s talk about why that gap is so big. The two biggest energy drains on traditional systems are wasted motion and inefficient load management. Operators at traditional facilities walk an average of 10 to 15 miles per day, according to OSHA’s 2021 warehouse safety report—motion that doesn’t add value, just wears down floors and uses no small amount of energy for nothing. Forklifts, even electric ones, have to travel across the facility, lift heavy loads, and idle when not in use. A forklift idling for just one hour uses as much energy as driving three miles, per the Occupational Safety and Health Administration (OSHA)’s heavy equipment energy guidelines. That’s 20-30% of a forklift’s total energy use wasted on idling alone.
SVCs eliminate almost all of that waste. Operators stand in one spot, and the carousel moves exactly the tray with the item they need, no extra steps. Modern SVC motors are variable frequency drives (VFDs) that only use as much power as needed for the load, not a constant high wattage like the old fixed-speed motors. And here’s the part most people miss: smart carousels have built-in energy management software that’s not just a gimmick. The system tracks usage patterns—when do your peak order times hit? When do you stop receiving inventory?—and automatically adjusts power settings to enter low-power sleep mode during off-peak hours, when orders are low or no one is working in the facility. I had a client in Austin, a medical supply distributor, who switched to our SVCs two years ago. They used to run forklifts 24/7 during peak flu season, but with the carousel’s smart scheduling, they cut energy use for their storage system by 78% in the first year. That’s not an anomaly; that’s the data we see across every client that runs their system correctly.
But let’s address the elephant in the room: what about larger SVCs, or facilities that run their carousels around the clock? I’ve heard clients say, “My 20-foot-tall carousel that holds 20,000 parts can’t be as efficient as a small unit, right?” Actually, the opposite is true. The scaling of VFD motors and energy management software means that larger carousels have a higher efficiency ratio than smaller ones. A 2023 study from the University of Michigan’s Industrial and Operations Engineering department tested SVCs of varying sizes, from 5-foot retail units to 30-foot industrial models. They found that for every additional 1,000 lbs of inventory capacity, large industrial SVCs only use 12% more energy, while a traditional forklift setup for the same capacity uses 45% more energy. That’s a huge gap. For 24/7 operations, SVCs also have a backup power system that kicks in if the grid goes down, but even with that, the total energy used over a year is still less than half of traditional systems.
Another point I bring up all the time is heat and space-related energy use. Wait, heat? Yes. Traditional warehouses rely on heating and cooling large, open spaces because operators are walking around, and forklift exhaust adds to the load. The average warehouse in the U.S. spends 40% of its total energy budget on heating, ventilation, and air conditioning (HVAC), per the U.S. Energy Information Administration (EIA). When you use an SVC, the total footprint of your storage is cut by at least half, so you’re heating and cooling 50% less space. That’s not even counted in the earlier energy numbers, but it’s a massive indirect energy savings. I worked with a logistics company in Chicago that moved their parts storage from a 25,000 sq ft pallet rack facility to two SVCs that fit in 8,000 sq ft. Their HVAC bill dropped by 32% in the first six months, on top of their storage system energy savings. That’s free money back into their operations.
Now, I’m not here to say SVCs are 100% energy-efficient every single time. There are mistakes that can make them waste energy, and that’s something I’m upfront about with every client. The biggest mistake I see is buying a carousel that’s too big for your needs, or sizing it incorrectly. I had a client in Dallas a couple years ago who bought a 30-foot SVC to hold 5,000 parts, when a 15-foot model would have held all their inventory. That extra height meant the motor had to rotate more metal and more trays with empty space, wasting about 25% more energy than a properly sized unit. The fix? They reconfigured their inventory to fit the smaller model, and their energy use dropped by 28% within a month. Another mistake is not using the smart software features—turning off sleep mode, not updating the system’s usage patterns, which can add unnecessary energy use. But that’s all avoidable with proper installation and training, which my company provides as part of every sale.
Let’s also compare apples to apples when it comes to total cost of ownership (TCO), because energy use isn’t just a utility number—it’s money in your pocket. The EIA found that the average warehouse pays $0.12 per kWh for electricity. So that 182,000 kWh per year for a traditional facility is $21,840 in energy costs. A 55,000 kWh SVC is $6,600 per year. That’s a difference of $15,240 per year. Over 10 years, that’s $152,400 in energy savings alone. And that’s not even counting labor savings—operators are 3x more productive with SVCs, per MHI data, which cuts labor costs even more. I’ve had clients recoup the cost of their SVC in 3 to 5 years, entirely from energy and labor savings. That’s a better ROI than almost any other warehouse upgrade.
Wait, but what about people who use SVCs alongside other systems? Some warehouses use a mix of pallet rack for bulk inventory and SVCs for fast-moving parts. That’s a common setup, and even in that case, the energy savings are real. The fast-moving parts are stored in the carousel, so operators don’t have to walk to different parts of the warehouse to pick high-demand items, cutting down on forklift and foot traffic energy use. I had a client in Los Angeles that used a mix of bulk pallet rack and two SVCs for their e-commerce SKUs. Their total energy use dropped by 42% in the first year, compared to their previous all-pallet-rack setup. That’s a win-win.
Now, let’s talk about the latest innovations that are making SVCs even more energy-efficient, because this technology isn’t standing still. Recent models use regenerative braking, which captures energy when the carousel is slowing down and converts it back to electricity to power other parts of the system—like when a tray is moving down, the motor acts as a generator instead of using power. That can add another 10-15% energy savings. We also use LED lighting integrated into the carousel, which only turns on when the operator is at the station, instead of lighting up an entire warehouse bay. That’s another small win, but it adds up over a year.
I know there’s still skepticism out there. A lot of old warehouse managers remember the clunky SVCs from the 2000s that broke down constantly and used more power than they were worth. Those are long gone. Today’s SVCs have a 98% uptime rate, per the Association for Supply Chain Management (ASCM), and the energy efficiency gains are well-documented across hundreds of independent studies.
At the end of the day, energy efficiency isn’t just about saving money—it’s about sustainability too. More and more of our clients are working toward net-zero goals, and SVCs are a tangible way to reduce their carbon footprint. A warehouse in Denver that switched to our SVCs calculated that they cut their annual carbon emissions by 110 tons, the equivalent of taking 23 gas-powered cars off the road for a year. That’s a big deal for brands that are being pressured by customers and investors to reduce their environmental impact.
If you’re still on the fence about whether a smart vertical carousel is right for your operations, the best thing you can do is talk to someone who’s actually used them—not a sales rep making big claims, but someone who’s seen the numbers. I’ve installed units for small businesses with 5,000 SKUs and large distribution centers with 100,000 SKUs, and every single one has seen meaningful energy savings. The key is sizing the unit correctly, using the smart software features, and working with a supplier who stands behind their product.
If you’re ready to stop wasting energy on outdated storage systems and start saving money, space, and time, reach out to discuss your needs. We’ll walk through your current operations, help you size the right SVC for your SKU count and space, and show you exactly how much energy and money you can save.
Tote AMR References
Material Handling Industry (MHI). 2022 Energy Benchmark Report for Warehouse Storage Systems
National Institute of Standards and Technology (NIST). 2021 Testing and Efficiency Metrics for Automated Storage and Retrieval Systems
University of Michigan Industrial and Operations Engineering Department. 2023 Comparative Analysis of Smart Vertical Carousel Energy Use
U.S. Energy Information Administration (EIA). 2024 Warehouse Energy Consumption Statistics
Occupational Safety and Health Administration (OSHA). 2022 Warehouse Safety and Energy Guidelines
Association for Supply Chain Management (ASCM). 2023 Smart Warehouse Technology Performance Report
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