Western Power
Western Power runs the network that makes up most of the South West Interconnected System — Perth and the connected south-west. Everything outside that footprint is Horizon Power's, on separate systems, so the first question on any regional job is which of the two the site actually sits on.
Who they supply
The south-west corner of Western Australia, Perth included — the network that makes up the vast majority of the South West Interconnected System.
Western Power — what we do · checked 2026-09-28
Western Australia is not one network. Outside the interconnected south-west, supply is Horizon Power’s, on systems that are separate from this one — so a regional WA site is not a Western Power job until the bill or the NMI record says it is. Getting this wrong means the wrong portal, the wrong technical requirements and the wrong commissioning path. Horizon Power — who we serve
A Western Power site is not always on the grid. In some regional areas the poles and wires have been replaced with a stand-alone power system, and the network’s own guidance is that customer solar and batteries there run for self-consumption, configured not to export and outside the buyback schemes. On a regional job, establish whether the site is on a stand-alone system before the design is priced. Western Power — stand-alone power systems FAQs
What they assess
- Application before installation
- An embedded generation connection application is required before the work, not after it. Approval is a precondition of the install rather than a formality that follows it.
- Covers changes, not just new systems
- Changing or relocating an existing inverter, or adding a second generation source such as a battery, opens an application in its own right — an existing approval does not carry over to the altered system.
- Assessed against a rated capacity band
- The pathway is banded by inverter rated capacity, so establishing which band the system falls in decides which process, and which page, applies before anything else.
Where it snags
The connection is the property owner's, not the installer's. An installer can lodge and track it, but only once the owner has authorised them to apply on their behalf — worth settling at quoting, because it is a prerequisite to lodging rather than a step inside it. Western Power — inverter system connection
A strata or otherwise shared connection has to go through the management body before the application, not alongside it. On multi-dwelling sites that consultation, not the network, is usually what sets the timeline. Western Power — inverter system connection
Lodging and tracking happen in different places. The application is submitted from the connection page, then followed in a separate status portal — so a job with no visible progress is often being tracked on the wrong surface.
Go straight to
Confirm the distributor from the bill, NMI record or connection approval before relying on this page. Embedded networks, remote grids and private networks may use a different authority. The connection offer and the site-specific approval override anything general, here or on the distributor’s own site. Reviewed 2026-09-28.
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