Harvest is the highest-stakes stretch of the year, and for most wineries, it’s also the most expensive one to run. Refrigeration is the single largest energy draw in a winery, and summer heat doesn’t let up just because you need tight temperature control. The good news: energy efficiency tank insulation is one of the most direct, measurable ways to cut that cost while protecting wine quality when it matters most.

Key Takeaways

• Wineries spend roughly 60% of their energy bills on refrigeration, insulation directly attacks that number.
• PolarClad tank insulation can reduce ambient thermal energy by up to 96.5%, and has paid for itself in as little as 1.5 years for some clients.
• In one year alone, PolarClad customers collectively saved over 5 million kWh.

Why Harvest Is Your Biggest Energy Problem

During harvest, your refrigeration system runs hard. Fermentation generates heat. Ambient temperatures peak. And the tanks themselves, if uninsulated, absorb heat from the surrounding air all day.

The result: your chillers work overtime just to hold the temperatures you set. That’s not a minor inconvenience. It’s a structural inefficiency that compounds every day from crush through post-fermentation.

Most producers accept this as “just how harvest goes.” It doesn’t have to be.

What Heat Actually Does to Your Tanks

An uninsulated stainless steel tank in direct sun absorbs ambient heat through its walls. Your refrigeration system then has to overcome that heat load continuously, not just cool the wine from fermentation temperature, but fight the environment the tank is sitting in.

In hot climates that ambient load is substantial for months at a time.

This creates 3 compounding problems:

• Higher energy draw — chillers cycle more frequently and run longer
• Temperature instability — tanks in sun-exposed positions fluctuate more than shaded ones, creating lot-to-lot inconsistency
• Equipment strain — refrigeration systems running near capacity during peak harvest hours are more vulnerable to failure at exactly the wrong time

How PolarClad Tank Insulation Works

PolarClad is a sophisticated tank insulation system distributed exclusively in the USA by BevZero. (In Europe, the equivalent product is BevClad.) It’s designed to reduce the heat gain that forces your refrigeration system to work harder than it should.

The system delivers up to 96.5% reduction in ambient thermal energy absorbed by the tank. That’s not a marginal improvement, it’s a fundamental change in how much work your chiller has to do.

What PolarClad is built to do:

• Reflect and dissipate ambient heat before it reaches the tank wall
• Maintain stable internal wine temperature with less refrigeration cycling
• Protect against weather, birds, and pests
• Meet Energy Star approval standards
• Use locally sourced raw materials; 100% recyclable with zero waste stream to landfill

It also makes cold stabilization easier, an added benefit for wineries running that process post-harvest.

The Numbers Behind the Decision

The case for insulation becomes clearest when you look at aggregate performance data.

In one year, wineries running PolarClad collectively saved over 5 million kWh of energy. That’s enough energy to power 770 California homes for a full year.

For individual operations, payback periods have been as short as 1.5 years, depending on tank count, location, and current refrigeration load.

This is not a marginal operational tweak. For a winery spending 60% of its energy budget on refrigeration, reducing that load meaningfully changes the economics of production.

Cold Stabilization Gets Easier Too

Cold stabilization is one of the more energy-intensive post-harvest steps, holding wine at near-freezing temperatures for days to drop tartrate crystals. Insulated tanks hold those low temperatures more efficiently, reducing the refrigeration input needed to maintain them.

BevZero also distributes the VinFoil tank mixer, which pairs well with PolarClad for cold stabilization. VinFoil achieves cold stabilization up to 3 times faster than the pump method, with average energy savings of over 80% during that process. The two systems address complementary parts of the same problem: insulation reduces heat gain, and VinFoil reduces the time and energy needed to reach and hold cold stabilization targets.

Is This Right for Your Operation?

PolarClad makes the most sense for wineries that:

• Have tanks in sun-exposed positions or hot ambient environments
• Run refrigeration near capacity during harvest and post-harvest
• Want to reduce energy costs without changing their winemaking process
• Are looking for a sustainability improvement with a measurable ROI

It’s available in the USA through BevZero, and the European equivalent (BevClad).

What to Do Next

1. Assess your current refrigeration load
   1. Identify which tanks have the most sun exposure or run at the highest chiller demand
   2. Note any temperature inconsistency between tank positions during warm months
2. Contact BevZero to discuss your facility
   1. BevZero’s team can help you evaluate whether PolarClad is a fit for your tank configuration and climate conditions
   2. No obligation — this is a working conversation about your actual operation
3. Get a quote and timeline
   1. PolarClad installs without disrupting your production workflow
   2. BevZero handles the process from specification through installation

Cut Your Cooling Costs Before Harvest with BevZero

If refrigeration is eating 60% of your energy budget and you’re running uninsulated tanks, you’re paying for heat gain every single day. PolarClad tank insulation addresses that directly — reducing ambient thermal load, stabilizing temperatures, and lowering the demand on your chiller system.

BevZero distributes PolarClad exclusively in the USA and BevClad in Europe. Reach out and we’ll walk through your tank setup and what energy efficiency tank insulation could realistically do for your operation.

👉 Contact BevZero online now or email us at [email protected] to learn more about our PolarClad tank insulation systems.