The Problem with Traditional Backup Power
Australian businesses lose an average of $15,000-$50,000 per hour during power outages (depending on industry). The traditional solution — a diesel generator — addresses the symptom but creates new problems:
| Factor | Diesel Generator | Battery Storage |
|---|---|---|
| Capital cost (100kW) | $50,000-$120,000 | $120,000-$180,000 |
| Annual maintenance | $5,000-$15,000 | $1,000-$3,000 |
| Fuel cost per outage | $200-$500/hour | $0 (stored energy) |
| Revenue when not in use | $0 | $25,000-$55,000/year |
| Startup time | 10-30 seconds | <20 milliseconds |
| Emissions | 2.7kg CO₂/litre diesel | Zero |
| Noise | 75-95 dB | Silent |
| Indoor installation | No (ventilation required) | Yes |
| Lifespan | 10,000-30,000 hours | 10-15 years (daily cycling) |
| End-of-life value | Scrap | Recyclable (lithium recovery) |
The critical difference: a battery earns revenue every single day through demand management and energy arbitrage. A generator sits idle, depreciating, waiting for an event that may happen 2-5 times per year.
"We installed a 150kW/300kWh battery system at a medical imaging centre in Macquarie Park. They needed uninterruptible power for MRI and CT scanners — previously running a $180,000 diesel generator with $12,000/year maintenance. The battery provides seamless backup (20ms switchover vs 15-second generator startup), saves $42,000/year in demand charges, and paid for itself in 4.2 years. The generator is now decommissioned." — Mark Willis, Head of Renewables & Electrification, Cable Co
How Batteries Generate Revenue While Providing Backup
Revenue Stream 1: Demand Charge Reduction
Most commercial electricity bills include demand charges — a fee based on your peak 30-minute consumption in the billing period. Rates range from $15-$45 per kVA per month.
A battery monitors your consumption in real-time and discharges during peak periods to "shave" the demand spike. Result: lower peak demand recorded, lower demand charges.
| Peak Demand Reduction | Monthly Saving ($25/kVA) | Annual Saving |
|---|---|---|
| 50 kVA reduction | $1,250/month | $15,000/year |
| 100 kVA reduction | $2,500/month | $30,000/year |
| 200 kVA reduction | $5,000/month | $60,000/year |
Revenue Stream 2: Energy Arbitrage (Time-of-Use Shifting)
Charge the battery during off-peak periods ($0.12-$0.18/kWh) and discharge during peak periods ($0.35-$0.55/kWh). The spread generates $0.17-$0.37 per kWh cycled.
| Battery Size | Daily Cycles | Annual Arbitrage Revenue |
|---|---|---|
| 50kWh | 1 cycle/day | $3,100-$6,750/year |
| 100kWh | 1 cycle/day | $6,200-$13,500/year |
| 200kWh | 1 cycle/day | $12,400-$27,000/year |
Revenue Stream 3: FCAS / VPP Participation
Batteries can participate in Frequency Control Ancillary Services (FCAS) markets or Virtual Power Plant (VPP) programs, earning additional revenue for grid stability services.
- FCAS revenue: $2,000-$8,000/year per 100kW of capacity
- NSW PDRS VPP: $36-37/kWh of enrolled capacity (one-time payment)
Sizing Guide: Battery for Business Continuity
| Business Type | Critical Load | Recommended Battery | Backup Duration | Total Cost | Annual Revenue |
|---|---|---|---|---|---|
| Small office (500m²) | 20kW | 20kW/40kWh | 2 hours | $35,000-$50,000 | $8,000-$12,000 |
| Medical/dental practice | 40kW | 40kW/80kWh | 2 hours | $65,000-$95,000 | $15,000-$25,000 |
| Retail store | 30kW | 30kW/60kWh | 2 hours | $50,000-$75,000 | $12,000-$18,000 |
| Restaurant/café | 50kW | 50kW/100kWh | 2 hours | $80,000-$120,000 | $18,000-$30,000 |
| Manufacturing (critical) | 100kW | 100kW/200kWh | 2 hours | $120,000-$180,000 | $25,000-$55,000 |
| Data centre (edge) | 200kW | 200kW/400kWh | 2 hours | $220,000-$340,000 | $45,000-$90,000 |
| Hospital/aged care | 300kW | 300kW/600kWh | 2 hours | $320,000-$480,000 | $65,000-$120,000 |
The Financial Model: Backup Power That Pays for Itself
Example: 100kW/200kWh System for a Manufacturing Facility
| Item | Value |
|---|---|
| System cost (installed) | $150,000 |
| Federal battery STC rebate | -$7,600 |
| Net cost | $142,400 |
| Demand charge savings | $30,000/year |
| Energy arbitrage | $12,000/year |
| FCAS/VPP revenue | $4,000/year |
| Avoided generator maintenance | $8,000/year |
| Total annual benefit | $54,000/year |
| Payback period | 2.6 years |
| 10-year net benefit | $397,600 |
Plus: seamless blackout protection for critical loads, zero emissions, silent operation, and no fuel storage compliance requirements.
Industries Where Battery Backup Is Critical
Healthcare & Medical
- MRI/CT scanners require uninterruptible power (data loss on outage)
- Refrigerated medications and vaccines
- Life support and monitoring equipment
- Battery provides <20ms switchover (vs 15-30 second generator)
Food & Beverage
- Cold chain integrity ($50,000-$500,000 stock at risk per outage)
- Production line continuity (batch loss on power interruption)
- HACCP compliance requires documented power continuity
Data & Technology
- Server rooms and edge computing
- Telecommunications equipment
- Point-of-sale systems (retail)
- Security systems (CCTV, access control)
Manufacturing
- CNC machines (job loss on power interruption)
- Furnaces and kilns (thermal shock damage)
- Clean rooms (contamination on HVAC failure)
- Robotic systems (position loss, recalibration)
Solar + Battery: The Complete Energy Independence Package
When combined with rooftop solar, battery economics improve dramatically:
- Solar charges the battery for free during the day
- Battery discharges during evening peak (highest rates)
- Demand charges eliminated during solar + battery hours
- Grid independence reaches 70-90% for many businesses
Combined solar + battery payback: 2-3.5 years (vs 3-5 years battery-only)
Cable Co's Commercial Battery Capability
Cable Co installs commercial battery systems from 20kWh to 2MWh+ across all Australian states. Our integrated service includes:
- Load analysis and demand profiling
- Battery sizing and financial modelling
- Electrical design and grid connection
- Installation and commissioning
- Energy management system programming
- 24/7 monitoring through our Command Centre
- All rebate paperwork (STCs, PDRS, VPP enrolment)
Call: 1800 117 177 | Email: renewables@cable-co.com.au