SWIS isolation
WA's grid doesn't connect to the NEM. There is no AEMO wholesale market or FCAS revenue — battery business cases hinge on self-consumption, demand-charge reduction and DEBS time-of-export.
Perth · WA · Commercial Energy
Commercial solar & battery storage in Perth.
Tier-1 PV, BESS and EV charging engineered for Perth businesses by ESQ — Brisbane HQ, Western Australia project delivery.
01 — Perth market
Perth sits inside the SWIS — a standalone grid with its own rules, Western Power as monopoly DNSP, and the highest commercial PV yield of any Australian capital. ESQ designs commercial solar, battery storage and EV charging across the Perth metropolitan area and into the Pilbara, engineered for Western Power DER Roadmap export limits, DEBS feed-in tariffs and WA's industrial load profiles.
Perth energy snapshot
- DNSP
- Western Power (SWIS)
- Avg commercial tariff
- 26 — 38 c/kWh
- Demand charges
- $12 — $24 / kVA / mo
- Feed-in (DEBS)
- 2.5 — 10 c/kWh time-of-export
- Export limit
- 5 kW residential · negotiated commercial
- Avg PV yield
- 1,520 kWh / kW / yr
02 — Why Perth is different
Local engineering factors we design around.
DEBS time-of-export pricing
WA's Distributed Energy Buyback Scheme pays a premium for energy exported in the evening peak. Properly sized batteries can shift surplus PV into the high-tariff window.
Western Power DER Roadmap
Commercial export approvals require DER Hosting Capacity Assessment. ESQ manages the technical application and emergency backstop compliance.
Pilbara & remote microgrids
Off-SWIS resources, mining and remote community projects need diesel-displacement modelling. We deliver PV+BESS+diesel hybrid systems across the Pilbara and Goldfields.
04 — Service areas
Greater Perth coverage.
Perth CBDJoondalupCockburnKwinanaWelshpoolCanning ValeMalagaWangaraHendersonRockinghamMandurahBunburyKarrathaPort HedlandKalgoorlie
05 — Perth FAQs
Common Perth questions.
- Do you install commercial solar across all of Perth?
- Yes. ESQ services the entire Perth metropolitan area and delivers commercial and industrial projects across regional WA, including Bunbury, the Pilbara and the Goldfields.
- Is the Federal battery rebate available in WA?
- Yes — the Federal Cheaper Home Batteries Program applies nationally, including WA. State-level battery incentives in WA are evolving; ESQ confirms current eligibility at quote stage.
- How does DEBS work for commercial solar in Perth?
- The Distributed Energy Buyback Scheme pays time-of-export — typically lower in the day and higher in the early evening. Properly sized battery storage shifts surplus PV into the high-tariff window to maximise export revenue.
- Does ESQ deliver off-grid and microgrid projects in WA?
- Yes. We design and build PV-BESS-diesel hybrid microgrids for off-SWIS mining, resources and remote community sites across the Pilbara, Kimberley and Goldfields.
- What export limits apply to commercial PV in Perth?
- Western Power assesses commercial export case-by-case under the DER Hosting Capacity framework. ESQ manages the application, including emergency backstop compliance and inverter configuration.
Scope your Perth project with an ESQ engineer.
48-hour response on commercial briefs across Western Australia.