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Inverter system greater than 30kVA to 150KVA

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Who is this for?

You want to connect an embedded generation system (such as solar panels) Inverter system greater than 30kVA to 150KVA. 

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How long will it take?

We will contact you within approximately three business days with the invoice. Once proof of payment has been received, we will assign for assessment and provide you with an estimated turnaround time.

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How much will it cost?

Enquiry fee - $250 plus GST.

Application fee - $5,000 plus GST.

Western Power offers a large range of connection services to a diverse range of customer groups and maintains a fairness policy for the management of applications to ensure an equitable service to customers. Like most industries, due to COVID-related impacts we’re currently experiencing supply chain constraints and delays. Additionally, an increase in market demand for construction and design service specialists means we’re working with limited and restrained resourcing to meet project needs, which has increased our regular times for scheduling/delivery of projects. We acknowledge these delays are frustrating and assure customers we’re working to improve wait times.

What will I need to complete this application?

Permission from your strata company (if applicable)

Application process


The enquiry stage involves a high-level feasibility assessment, which usually determines whether there are any network impediments to the generator connecting. If there is sufficient hosting capacity we'll provide you with an application form.


Western Power will conduct various studies and prepare Technical Schedules for the generator.

Request for Approval to Operate

Assessment of your commissioning report and updated Technical Schedules.

Additional information you need to know

  • The services of a National Engineering Register (NER) engineer will be required to advise in general on the process to be followed, the system design, and the equipment to use.
  • Installation needs to be compliant with the requirements of the Technical Rules, AS/NZS 4777.1, 4777.2, AS/NZS 3000, WASIR, WAER and other relevant Standards and Good Industry Practice.
  • Customer needs to provide a copy of the off-take agreement for the requested export capacity. The permitted export shall be the lowest value of the off-take agreement and the value determined by the network impact assessment – the default export limit value is 30% of the total inverter nameplate capacity to manage hosting capacity on the network. Without an off-take agreement, the installation shall be export limited to 5% of the total inverter capacity. This is a soft export limit based on the requirements of AS/NZS 4777.1 and AS/NZS 4777.2.
  • The site’s electrical retailer is required to submit an ETAF (Electricity Transfer Application Form) to Western Power and a service request to change the site’s meter to bi-directional (required regardless of whether the generator is exporting or not). These must be completed before an Approval to Operate can be released.

Reminder when filling in the enquiry form:

  1. Check the box applying on behalf of someone else.
  2. In the Applicant 1 section, enter the details of the sales/installation/engineering company. This is the company that is applying for the solar system on behalf of the end customer (and who will receive the invoice).
  3. In the Applicant 2 section, enter the details of the end customer. This is the organisation that will be using the solar system.

Ready to apply?

I've got my site map and single line diagram ready. Estimated time to complete: 10 mins