Energy Audits & Upgrades
Comprehensive refrigeration energy assessments that identify savings of 20–30% on typical commercial systems — with a clear upgrade roadmap and payback analysis.
Every source of refrigeration energy waste — and how much each one costs
The 20–30% efficiency figure isn't a single fix. It's the sum of multiple inefficiency sources that have been accumulating silently. These are what our audits find most consistently across 500+ commercial sites.
Inefficiency sources found in commercial refrigeration audits — typical energy impact
Fouled condenser coils
A condenser coil with a layer of dust and grease forces the compressor to work harder to reject heat. In Queensland's ambient conditions, a dirty condenser can reduce system efficiency by 8–15% without any visible symptom. The system appears to be running — just at elevated head pressure and increased power draw.
Worn or failing door seals
Cold air escaping through degraded seals forces continuous compressor operation to compensate. On multi-door commercial fridges or cool rooms with high door frequency, multiple failing seals accumulate into a significant ongoing energy cost — entirely preventable with a seal replacement.
Incorrect defrost scheduling
Most commercial refrigeration systems run on time-based defrost cycles set at installation and never reviewed. Systems defrosting too frequently waste energy heating and re-cooling the cabinet. Systems defrosting too rarely accumulate ice on the evaporator, reducing airflow and efficiency. Optimising defrost scheduling to actual operating conditions is one of the highest-value low-cost improvements available.
Refrigerant charge out of spec
A system running with low refrigerant charge operates at reduced efficiency — the compressor runs longer to move the same amount of heat. Overcharged systems run at excessive head pressure with similar results. Both conditions are invisible without instruments and both degrade efficiency continuously.
Fixed-speed compressor on variable load
Traditional fixed-speed compressors run at full power regardless of cooling demand — cycling on and off rather than modulating output. A variable speed drive (VSD) compressor matches output to actual load, reducing energy consumption during low-demand periods. This is typically the largest single efficiency gain available and the primary capital upgrade in our upgrade roadmaps.
Oversized system running at partial load
Systems installed with excess capacity relative to actual load short-cycle — high energy draw on startup, poor part-load efficiency. Identified in audit and addressed through controls optimisation or, in replacement scenarios, right-sizing the new system.
“The first thing we find on almost every audit is a fouled condenser that's been running that way for 12–18 months. That single item is typically worth 8–12% of the site's refrigeration energy spend — and it takes 30 minutes to fix. The audit pays for itself before we've even written the report.”
— ACRO energy audit team — commercial refrigeration efficiency, SE Queensland
Putting the 30–60% electricity figure in dollar terms
Refrigeration energy waste is invisible on your bill — it's absorbed into the total. These are the numbers that make it visible for a typical commercial operation.
Typical commercial hospitality venue
$3,000–$6,000/month typical for a mid-size pub, club or hotel
35–50% of total — $1,050–$3,000/month running refrigeration
Display fridges, cool rooms, beer system, ice machines
20–30% savings = $210–$900/month recoverable
Without replacing any major equipment
$2,500–$10,800/year
From audit and targeted upgrades on existing systems
Typical commercial kitchen or food retailer
$2,000–$5,000/month typical for commercial kitchen, café group or food retail outlet
40–60% of total — $800–$3,000/month running refrigeration
Cool rooms, display cases, undercounter, blast chiller
20–30% savings = $160–$900/month recoverable
Majority from maintenance and settings — not capital spend
$1,920–$10,800/year
Based on 500+ audits across SE Queensland commercial sites
Three tiers of improvement — from same-day fixes to capital upgrades
Not every saving requires capital expenditure. Our audit output prioritises improvements by cost, payback and impact — so you can act immediately on quick wins while planning capital upgrades with full financial visibility.
Tier 1 — Quick wins
Same visit or within days. Minimal cost. Immediate return.
Maintenance and settings improvements that require no capital approval and deliver measurable savings from the day they're completed.
- Condenser coil cleaning — 8–15% efficiency gain
- Door seal replacement — 5–10% energy reduction
- Defrost schedule optimisation — 5–12% saving
- Refrigerant charge verification and adjustment
- Temperature setpoint review — running colder than needed
- Night blinds or strip curtains on display cases
Typical payback: immediate. Condenser clean alone often covers the audit cost.
Tier 2 — Component upgrades
Weeks to months. Moderate investment. 6–18 month payback.
Targeted component replacements that deliver sustained efficiency gains beyond what maintenance alone can achieve.
- EC fan motor replacement — 30–50% fan energy reduction
- LED lighting retrofit in display cases and cool rooms
- Electronic expansion valve (EEV) installation
- Controls and thermostat upgrade for tighter setpoint control
- Anti-sweat heater controls — reduces door frame heating energy
Typical payback: 6–18 months depending on system size and usage hours.
Tier 3 — Capital upgrades
Planned investment. 18 month–3 year payback. Largest savings.
System-level upgrades that deliver the largest efficiency gains and extended equipment life. Each assessed with full payback analysis before recommendation.
- VSD compressor upgrade — 10–20% system energy reduction
- System replacement for end-of-life equipment
- Refrigerant conversion to lower-GWP alternatives
- Heat reclaim systems — recovering compressor waste heat
- Multi-compressor rack systems for large cold storage
Full payback period and projected savings provided in writing before any capital works are approved.
Post-upgrade measurement and verification — how we prove what we claimed
Any contractor can promise energy savings. We measure and report actual savings after every upgrade so you know exactly what was delivered against what was projected.
| Stage | What we measure | What you receive |
|---|---|---|
| Baseline audit | Current energy consumption per asset. Operating hours, compressor run time, head pressure, refrigerant charge, defrost frequency and door seal condition across all refrigeration assets. | Written audit report with current efficiency benchmark, inefficiency sources identified, and prioritised upgrade recommendations with projected savings and costs per measure. |
| Post Tier 1 (quick wins) | Compressor run time reduction after condenser clean and settings optimisation. Temperature stability before and after seal replacement. | Before/after efficiency comparison. Annualised saving calculation based on measured run time reduction. Delivered within days of works completion. |
| Post Tier 2 & 3 (upgrades) | 30-day post-upgrade energy monitoring using smart monitoring integration. Actual consumption compared against pre-upgrade baseline for equivalent operating conditions. | Verified savings report — actual kWh reduction, annualised dollar saving and comparison against projected payback period. Available for sustainability reporting. |
| Ongoing tracking | Continuous monitoring flags efficiency drift — if a newly upgraded system starts consuming more energy, the cause is identified before it becomes a fault. | Annual efficiency review included in maintenance plans. Savings protected long-term, not just at upgrade date. |
“We provide a projected saving before every upgrade and a verified saving report after. If the actual saving comes in below projection, we find out why and fix it. The payback period we quote isn't a marketing figure — it's something we're accountable for.”
— ACRO energy audit team — refrigeration energy upgrades, SE Queensland
What's Included
For most food businesses, refrigeration accounts for 30–60% of total electricity costs. Our energy audits systematically identify every source of inefficiency — from dirty condensers and worn door seals to oversized systems and poor defrost scheduling.
Discuss Your NeedsKey Benefits
- Full system audit with efficiency benchmarking
- Prioritised recommendations with savings estimates
- Payback analysis for each upgrade
- Condenser cleaning and tune-up included
- VSD compressor upgrade assessment
- Post-upgrade measurement and verification
How It Works
Baseline Audit
We measure current energy consumption and identify all inefficiency sources across your refrigeration assets.
Recommendations
Prioritised upgrade plan with projected savings, costs and payback periods for each measure.
Implement Upgrades
Our team carries out approved upgrades — from quick wins like coil cleaning to compressor upgrades.
Verify Savings
Post-upgrade monitoring confirms actual savings delivered against projections.
Frequently Asked Questions
How much can I realistically save?
Most commercial refrigeration systems have 20–35% efficiency headroom. Our audits consistently find savings within this range.
Do I need to replace my whole system?
Rarely. The majority of savings come from maintenance, settings optimisation and targeted component upgrades.
How long does an audit take?
A typical commercial site audit takes 2–4 hours on-site, with a written report delivered within 5 business days.
Refrigeration Emergency? We're On Call 24/7.
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