The Cost of Power
Australian electricity is among the more expensive in the developed world. Commercial sites pay roughly A$0.25–0.35 per kWh — and, just as importantly, most large customers are billed not only on the energy they consume but on the kVA demand they place on the network. For a factory, data centre, cold store or commercial estate, that combination means every percentage point of wasted current is charged twice over: once on the unit rate, and again on the demand.
Australia is not a single national grid but a liberalised, multi-retailer market: the National Electricity Market (NEM) spans the eastern and southern states, while Western Australia runs the separate South-West Interconnected System and the Northern Territory its own. Prices are set competitively over a wholesale pool, and both the unit rate and the network charges vary by state and by distribution network — so the figures here are typical ranges, not a single tariff.
| Who pays | Typical price | Notes |
|---|---|---|
| Commercial & industrial (large LV sites) | A$0.25–0.35 /kWh | Among the developed world’s higher rates; most large sites also pay a kVA demand charge |
| Demand component | kVA demand tariffs widespread | A separate charge on the capacity you draw — not just the energy you use |
| Households (residential usage rate) | ~24–45 c/kWh | Varies sharply by state — South Australia highest, Victoria and Tasmania lowest |
Commercial and demand figures are from HarmoniQ’s market research, drawing on the Australian Energy Regulator (AER) and network charging data; all prices are in Australian dollars (A$). The household range is the residential usage (consumption) rate as reported by Canstar in May 2026, and excludes daily supply charges. Prices vary by state, distribution network and retailer and are revised regularly — verify against the Australian Energy Regulator, whose Default Market Offer is the reference price for New South Wales, South-East Queensland and South Australia, at the time of reading.
How You’re Billed
The headline cents-per-kWh is only part of the story. A large, interval-metered Australian site pays for the energy itself, for the networks that deliver it, for environmental and renewable-scheme costs — and, critically for power quality, for the peak demand it places on the network, measured in kVA. On the demand-based tariffs that most large customers sit on, that demand charge moves directly when you correct power factor.
| Component | What it is | Cut by power quality? |
|---|---|---|
| Energy (wholesale / commodity) | The kWh you consume, at the pool-set price | Indirectly — lower network losses |
| Network — energy (use of system) | Delivering power over the distribution network, per kWh | Partly |
| Network — demand charge (kVA) | A charge on the peak apparent-power demand you place on the network | Yes — correcting power factor cuts billed kVA directly |
| Power factor | Poor power factor inflates the kVA you are billed for at the same real load | Yes — correction to 0.98+ lowers it |
| Environmental & renewable levies | Renewable-scheme and green-program costs passed through the bill | No |
So the answer to the question Australian operators most often ask: yes, you are billed for kVA — through the network demand charge most large sites are on — and a poor power factor inflates that demand for the same useful work. Both the billed kVA and the demand charge fall as power factor rises toward unity, which is exactly what correction delivers.
Power Factor & Regulation
Australia does not impose one nationwide power-factor penalty in the way some Gulf utilities do. Instead the cost of low power factor falls out of the kVA demand tariffs that most large customers are on: a site running at 0.85 power factor draws more apparent power — and so is billed for more kVA — than the same site corrected to 0.98+, for exactly the same real load. Around 0.90 power factor is treated as good practice on large low-voltage connections, with correction expected where loads fall below it.
On harmonics, Australian connections are governed by the AS/NZS 61000 electromagnetic-compatibility and power-quality family of standards, alongside the AS/NZS 3000 wiring rules; connection to the network follows each Distribution Network Service Provider’s own rules. As rooftop-PV inverters, variable-speed drives, rectifiers and non-linear UPS systems multiply on Australian sites, staying inside the AS/NZS 61000 planning levels increasingly requires active harmonic filtering — not just a one-off survey.
kVA demand charges and network tariffs are set per Distribution Network Service Provider and published in their tariff and connection documents; harmonic and power-quality limits follow the AS/NZS 61000 family, with AS/NZS 3000 for wiring and AS/NZS 4417 for equipment marking. The exact demand-tariff structure varies by network and state — confirm the charges and limits that apply to your connection with your network operator and retailer, as they are updated periodically.
Why Power Quality Matters Here
Three structural forces make power quality an Australian boardroom issue, not just an engineering one. First, the tariff and the demand charge — already covered: power is expensive, and most large sites pay for the kVA they draw. Second, rooftop solar: Australia carries the world’s densest rooftop-PV fleet — around 4 million systems, nearing 25 GW, with renewables now supplying about 40% of generation — and that inverter-heavy supply is pushing reverse power flows, midday voltage rise, voltage unbalance and inverter-injected harmonics into the very low-voltage networks our equipment connects to. Third, load growth: a fast-expanding data-centre sector and motor- and VFD-heavy industry are adding large, harmonic-sensitive loads onto those same boards.
Australia’s distribution grid is broadly reliable, though it varies by network — so unlike sites in parts of Africa or the Gulf, most Australian operators are driven by cost, demand charges and power-quality events rather than by keeping the lights on. That said, the 2016 South Australian statewide blackout was a reminder that high-renewables grids can be fragile, and that clean, stable power at the point of use is worth protecting.
The Solution
HarmoniQ installs a coordinated, solid-state system at the low-voltage switchboard — where Australian sites carry their cost, where the kVA demand charge bites, and where the solar-heavy grid injects voltage swings and distortion. We deploy three products as the site requires: the HarmoniQ Booster for real-time power factor correction, the HarmoniQ Filter (HPF) for harmonic mitigation, and HarmoniQ Alpha as the integrated platform tying correction, filtering and voltage optimisation together. No switched-capacitor steps, no contactors, and no resonance risk with the harmonics already on your system.
Real-time true power factor correction to 0.98+ across the whole network — directly reducing the kVA demand your network tariff bills against, and freeing transformer headroom so a growing site can add load without a costly connection upgrade.
Active harmonic filtering that holds distortion within the AS/NZS 61000 planning levels — the component that matters most in Australia’s inverter-rich environment, where rooftop PV, VFD-driven chillers, rectifiers and non-linear UPS systems all push harmonic levels up.
Unifies correction, filtering and voltage optimisation across multiple boards or sites — stabilising voltage against the midday rise and unbalance the rooftop fleet creates, with the visibility to prove power factor, kVA demand and harmonics at the meter, continuously.
Why not just install capacitor banks? + Read more− Close
Switched-capacitor banks correct power factor in fixed steps at the incoming feed — enough, in theory, to lift you over a kVA threshold at the meter. But they respond in steps and seconds, so they lag fast-changing loads; they sit only at the boundary, so reactive current still flows through your internal network; and on a system carrying harmonics — as nearly every modern Australian site does, with its drives, rectifiers and rooftop-PV inverters — a capacitor bank can form a resonant circuit with the supply, amplifying those harmonics.
HarmoniQ is solid-state and dynamic: it corrects continuously rather than in steps, works across the network rather than at one point, and carries no resonance risk. Paired with active filtering, it is power factor correction and harmonic mitigation designed for a plant full of drives and inverters — and for a grid reshaped by rooftop solar — not the switchgear of forty years ago.
What It’s Worth
| Lever | What changes | Effect on the bill |
|---|---|---|
| Power factor 0.80 → 0.98+ | Billed kVA demand falls for the same real load | kVA demand charge cut directly |
| Harmonic filtering to AS/NZS 61000 | Lower distortion, cooler transformers & cables | Lower losses, longer asset life |
| Voltage stabilisation | Rides out solar-driven midday over-voltage & unbalance | Protects sensitive loads, fewer nuisance trips |
| Capacity release | ~15–20% of transformer / switchgear headroom freed | Defer or avoid a connection upgrade |
| Indicative annual saving | A six-figure sum on a site of this size — plus the capacity released and the loads protected | |
Every site’s loads, tariff and reactive profile are different, and the figures above are illustrative of the mechanism — not a quote. Our engineers will model the exact power factor improvement, kVA demand avoided, losses recovered and capacity released for your specific connection — get in touch for a site assessment, or see the method on our power factor correction and demand-charge pages.