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Solar connections

Solar connections

Single line diagram

A single line diagram (SLD) needs to contain information on the installation wiring from the point of supply off the Western Power network, through to all the inverters on site, including where the customer’s load is connected. 

It also needs to contain information on all protection devices and switches, as well as any communications required to achieve the desired operation of the system (i.e. self-consumption, export limit, etc.).

SLDs must use correct electrical symbols (as per Table J1 of AS/NZS 3000:2018) and should contain at least, but not limited to, the following... Read more

Date effective: 1 January 2018-->

The terms used in these conditions have the same meaning as in the Electricity Networks Access Code 2004.

1. The approved inverter system must not be connected after the expiry date recorded on the approval.

2. Approval is void should the application details be subsequently found to be invalid.

3. All installations must:

Have Western Power approved import/export metering

Be installed as detailed in the approved application (including diagrams)

Have switches/breakers installed to legislative and network operator requirements

4. For new installations:

New inverters must... Read more

Your connection point has a fixed capacity. If it is shared with other customers, potentially multiple new systems could be added and exceed that capacity. This can make it unsafe and unreliable.

Shared connections must be managed to ensure that all customers have access to a safe and secure electricity supply as well as the opportunity to connect to benefit from renewable energy solutions.

Before applying to connect this type of equipment, tenants or owners with shared connections should first seek permission from their strata company or management body to use a portion of the total network capacity allocated.

Failing to do this may prevent others from connecting their equipment, or require the management body to upgrade the connection to our network to accommodate the needs of all owners and or tenants.

It's important to remember that the strata company or management body is ultimately responsible for the management of the common connection to the network and the common... Read more

Shopping centres, commercial tenancies, strata schemes and other grouped properties typically share a single connection point to our network that determines the total allocation of available electricity supply and generation capacity to be shared by all lots.

This connection point has a fixed capacity, so it's important for tenants, owners and prospective purchasers to be aware of the arrangements and obligations relating to the connection, as it may restrict their ability to install equipment such as home EV charging stations, rooftop solar panels and batteries.

The revenue meter is required to be changed or reconfigured to measure bi-directional energy flows (import – export meter registers) before the connection of the embedded generation system. Please contact your electricity retailer before applying to Western Power for technical approval of your proposed system.

If a sub-meter is associated with the connection point at which bi-directional flows will occur, you may wish to engage a licensed electrical contractor to change the sub-meter and make the necessary arrangements with you at the revenue meter.

If bi-directional flows will occur at a... Read more

Your connection will either be an individual connection or a shared connection.

Each connection has a ‘generation allocation’, or amount of solar, it can accommodate.

When you make an application to us to connect solar PVs our system will show whether the connection for the given address is individual, shared or unknown. The connection type is important to us for assessing the application. 

Individual connections have their own connection and generation allocation. 

Shared connections share a connection and generation allocation with others in the same development. 

Unknown means we must review to... Read more