Brewery Electricity Costs: 8 Proven Ways to Reduce Your Bill

Electricity is the single largest utility cost in most craft breweries. Refrigeration, compressed air, lighting and motors run continuously. At current UK rates of £0.19 to £0.29 per kWh, a brewery at the 27 kWh/hl Brew Resourceful benchmark producing 10,000 hl per year is spending £65,000 to £95,000 on electricity annually.

Breweries running less efficiently can spend two to three times that for the same output.

Most of that spend is manageable. This article covers eight specific interventions, each with indicative costs and payback periods.

How much electricity does a brewery use? UK benchmarks

The metric that matters is kilowatt-hours per hectolitre of packaged beer (kWh/hl), not total consumption. Total kWh tells you nothing without knowing your throughput. Brew Resourceful's UK craft brewery benchmark is 27 kWh/hl, based on data from breweries that have completed a structured energy review.

• Best in class: below 20 kWh/hl

• Good performance: 20 to 35 kWh/hl

• Average: 35 to 60 kWh/hl

• Significant opportunity: above 60 kWh/hl

Electricity use in a typical brewery breaks down roughly as follows:

• Refrigeration (glycol chilling, conditioning tanks, cold store): 35 to 45%

• Compressed air: 15 to 25%

• Pumps and motors: 15 to 20%

• Lighting: 8 to 12%

• HVAC and ancillaries: 10 to 15%

Refrigeration dominates, which is why any serious reduction programme starts there.

1. Switch to LED lighting across your site

Lighting is the easiest win and the fastest payback. Most pre-2018 breweries still run fluorescent or metal halide high-bay fittings.

A 400W metal halide fitting replaced with a 150W LED saves 250W per unit. Running 12 hours a day across 300 operating days, that is 900 kWh saved per fitting each year, or roughly £252 at £0.28/kWh. Installed LED high-bay fittings typically cost £80 to £200, giving a simple payback of 4 to 10 months.

The approach is straightforward: audit all fittings first to capture count, wattage and hours by area, then prioritise the high-bay production spaces where wattage and run-hours are highest. Get two to three supplier quotes; the market is competitive. Most suppliers offer 0% finance schemes, and the payback is fast enough that the install can effectively self-fund. Add motion sensors in low-traffic areas for a further 30 to 50% saving in those zones.

2. Upgrade your refrigeration system

Refrigeration is where the money is. If you do one thing to reduce electricity costs, do it here.

Variable Speed Drive compressors

Fixed-speed compressors run at full load or not at all. VSD compressors modulate output to match demand. Since refrigeration load varies significantly across the brew cycle, the saving is substantial: VSD compressors typically use 20 to 40% less electricity than fixed-speed equivalents in brewery applications. Payback on a retrofit or replacement runs to 2 to 4 years. As a bonus, heat recovery from compressor discharge can offset gas costs by feeding hot water or space heating simultaneously. Even if VSD's are out of the question, more compressors help manage the load more efficiently especially when on lower loads.

Set-point optimisation: zero capital cost

Every 1°C rise in your set point improves compressor efficiency by 2 to 3%. Many breweries can raise glycol temperature by 2 to 4°C with no measurable quality impact, delivering 4 to 12% less refrigeration electricity at zero capital cost. Cold stores can often run at 5°C overnight instead of 2°C (especially in winter) without affecting products. Review your set-points before spending on equipment.

3. Install variable speed drives on motors and pumps

Halving a fan or pump motor's speed reduces power consumption by 87.5%. VSDs exploit this wherever flow does not need to be constant, and several systems in a typical brewery qualify: cooling tower fans (where speed can vary with ambient temperature and heat load), wort transfer and CIP pumps (which often run at full speed when partial flow would suffice), and HVAC supply and extract fans in production and conditioning areas.

On variable-load applications, savings typically run to 20 to 50% of motor energy. Capital cost per installation is £800 to £5,000 depending on motor size, giving a simple payback of 1 to 3 years on heavily used motors.

Practical test: if a motor has a throttling valve or bypass in its circuit, it is a strong VSD candidate. The valve is wasting energy that a VSD would eliminate.

4. Manage your half-hourly demand

Breweries above 100kW peak demand pay a demand charge based on their highest 30-minute consumption reading. Reducing that peak, even once, can have a disproportionate effect on the annual bill.

The approach is to identify when peak periods occur (typically Monday start-up or when brewing, refrigeration and CIP run together simultaneously), then stagger start-up sequences so the largest loads come on with a short delay between each. Scheduling CIP when refrigeration load is low rather than at maximum helps significantly. If your metering system supports demand alerts, set them. For sites below 100kW, this is less relevant; for larger operations, demand management alone can cut costs by 5 to 15% without touching total consumption.

5. Time your high-load processes off-peak

On a time-of-use tariff, peak versus off-peak rates can differ by 2 to 3x. Moving energy-intensive work to off-peak windows directly reduces spend without any capital investment.

Refrigeration defrost cycles can be programmed to run midnight to 6am. A 6am mash start instead of 8am shifts significant load to cheaper periods. Overnight CIP of conditioning tanks can usually be scheduled without affecting production flow. EV or forklift charging should run off-peak by default.

Review your tariff structure first. On a flat rate, the disruption to working patterns may not justify the saving. With a ToU contract carrying a 50% or more differential, it usually does.

6. Fix compressed air leaks

Generating compressed air is energy-intensive: 1 kWh of useful pneumatic energy costs 8 to 10 times more to produce than using electricity directly. Leaks are silent, invisible under normal conditions, and run continuously.

The scale tends to surprise people. Industry average is 15 to 30% of compressed air output lost to leaks before it reaches the application. A single 3mm leak at 7 bar loses approximately 1,500 litres of air per minute. For a 75kW compressor running 8 hours a day with a 20% leak rate, that translates to £8,000 to £12,000 per year in wasted electricity.

How to find and fix leaks

1. Night audit: run the compressor with all production off, record pressure drop over 15 minutes to calculate your leakage rate

2. Ultrasonic detection: a technician can survey the full site in a few hours; rental equipment is available if you want to do it in-house

3. Fix in severity order: hose connections, quick-release couplings and thread fittings fail most often

4. Retest after fixing to quantify the improvement and track progress over time

This is one of the very few electricity-saving measures with near-zero capital cost. Payback is measured in weeks, not years.

7. Consider on-site solar PV

Solar PV economics have improved significantly as panel costs fell and electricity prices rose. For daytime operational breweries, self-consumption profiles are strong.

For a small brewery producing 1,000 to 5,000 hl per year, a 20 to 50 kWp system is typically appropriate; mid-size operations at 5,000 to 30,000 hl generally suit 50 to 200 kWp.

Installed cost for a commercial roof-mounted system runs to £700 to £900 per kWp. UK generation comes in at 900 to 1,050 kWh per kWp annually for a south-facing, unshaded roof. With self-consumption at 70 to 90%, most of what you generate displaces imported electricity at 25 to 35p/kWh rather than exporting at 4 to 8p/kWh, giving a simple payback of 4 to 6 years at current costs.

Always model using your specific roof orientation. Actual generation can be 20 to 30% below headline figures if shading or pitch is not ideal. Request a site survey, not just a generic quote.

8. Get a brewery energy audit

The seven measures above apply to most breweries. Which ones apply to yours, in which order, depends on your specific equipment, tariff and operating profile.

A brewery electricity audit typically covers half-hourly data analysis to identify peak loads, overnight baseload and demand profile; an equipment survey looking at age, condition and efficiency of all significant electrical loads; and a tariff review to check whether your contract structure suits your load profile. The output is a prioritised opportunity list with each measure ranked by annual saving and payback, and a clear split between what requires capital investment and what is an operational change.

Breweries that have been through a structured electricity audit typically identify savings of 15 to 30% of their bill. For a brewery spending £150,000 per year on electricity, a 20% saving is £30,000 annually.

How do your brewery electricity costs compare?

The benchmarks above give you an approximate position. The free brewery benchmarking report gives a more precise comparison against breweries of similar scale, covering electricity per hl, water per hl, gas per hl and overall utility cost per hl.

If your kWh/hl is significantly above the benchmarks, start with refrigeration and compressed air. If you are close to average, demand management, solar and operational scheduling are the next tier.

Book a free brewery energy assessment to identify your specific electricity-saving priorities and quantify the saving available at each.