Western Power Proposes 10kVA Upgrade for Single-Phase Solar in WA: What It Means for Homeowners
Brought to you by Australis Solar – Perth’s Trusted Solar and Battery Experts
A pivotal update is on the horizon for Western Australia’s residential solar sector. Western Power is currently reviewing a proposal to increase the approved inverter capacity limit for single-phase homes from 5kVA to 10kVA. If passed, this change will come into effect from 1 July 2025 and could dramatically expand what’s possible for homeowners considering or upgrading solar systems.
Understanding the Current Limitation
At present, most single-phase homes across Western Australia are limited to installing solar inverters with a capacity of up to 5kVA. While some customers work around this by using export-limited or hybrid systems, the restrictions often reduce the overall potential of a solar installation.
With the proposed change, residential properties will be able to install up to 10kVA of inverter capacity, allowing for larger solar systems that can generate significantly more energy.
Why This Matters for Homeowners
The move to a 10kVA threshold for single-phase homes is not just a regulatory update — it represents a meaningful leap in how homes can use and store renewable energy in WA.
Key benefits include:
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Greater Energy Generation
Homeowners can install more panels, generate more electricity, and reduce dependency on grid-supplied power. -
Improved Return on Investment
A larger system typically delivers better payback by increasing daytime energy self-consumption. -
Enhanced Battery Integration
Larger systems will pair more effectively with hybrid inverters and battery storage, such as the Sigenergy SigenStor. -
Future-Proofing for Growing Energy Loads
As more homes transition to electric vehicles, battery storage, and all-electric appliances, this upgrade helps ensure system scalability.
What This Means for Solar Installations in Perth
Australis Solar is already preparing for this transition. Our technical team is tracking the outcome of the Western Power meetings and preparing strategies for new installations and phased system upgrades that align with the upcoming rules.
We strongly encourage customers considering solar to start planning now. With proper system design, you can take advantage of today’s rebates while ensuring your setup is ready for tomorrow’s expanded inverter capacity.
What Should Homeowners Do Now?
If you’re currently on a single-phase supply or planning a solar or battery upgrade in 2025, here’s what we recommend:
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DISCUSS – Honest, helpful and upfront advise
Talk to Australis Solar about options and what is best fit for your energy needs. Choose inverters that are compliant and scalable, such as Sigenergy or Fronius GEN24. -
PLAN – for Expansion
We can install additional mounting infrastructure now, allowing your system to be expanded seamlessly once the 10kVA limit is officially adopted. -
SAVE – Stay Informed and Get Expert Advice
Australis Solar can help you interpret the latest Western Power guidelines and design a future-ready system that complies with all safety and technical standards.
Why Work With Australis Solar?
As a leading solar and battery provider in Western Australia, we design systems that not only meet today’s standards but anticipate tomorrow’s opportunities. With rebates, export limits, and network policies evolving rapidly, it’s never been more important to partner with a local solar provider who understands the WA energy landscape.
Whether you’re starting from scratch or looking to upgrade an existing system, we’re here to help.
Visit Contact us page or call us today to arrange a site assessment and personalised solar consultation.
Sources:
https://www.wa.gov.au/organisation/energy-policy-wa/information-industry-emergency-solar-management
The WA Residential Battery Scheme provides eligible homeowners with access to rebates and low-interest loans for solar battery installations across Western Australia. This initiative, supported by the state government, is designed to increase energy independence and reduce grid reliance by encouraging battery storage alongside solar systems. Installers and industry professionals can find full program details, compliance requirements, and application guidelines:
https://www.wa.gov.au/government/wa-residential-battery-scheme-information-industry