South Australia Solar Power System Grid Connection Rules & Process

Across Australia, Distributed Network Service Providers (DNSPs) – entities that own and maintain electricity networks – have different rules concerning inverter limits. In South Australia, there’s only one DNSP – SA Power Networks (SAPN). The following information is current as of September, 2026.

Single Phase Vs. Three Phase

Most SA homes have single-phase power, while around one quarter have three-phase power. Inverter capacity plus export limits are determined by the number of phases, so three-phase homes can potentially have three times as much of both as single-phase homes.

Flexible Vs. Fixed Exports

In South Australia, households that have solar installed can choose between flexible or fixed exports.

With flexible exports, a home can export up to 10 kW per phase. But when the grid is congested, the maximum amount that can be exported is reduced. With fixed exports, a home can export up to 1.5 kW per phase at any time, whether the grid is under stress or not. While with flexible exports, the amount of power that can be exported is sometimes reduced, it will still allow much greater total energy exports for nearly all systems. The exception is for systems with low total solar inverter capacity. It will depend on how much power a home draws during the day and if a battery is present, but in general, a solar inverter would need to be below 3 kW for a home to benefit from fixed rather than flexible exports. 

Rural SWER Lines

In rural areas, properties are often on SWER (Single Wire Earth Return) lines. Subject to a site assessment, these properties can be allowed flexible exports of up to 10 kW. But if they aren’t offered or you don’t want flexible exports, your export limit will normally be 0 kW, preventing power exports.

SA Solar Grid Connection Process

In South Australia, it’s a fairly simple process to have your solar power system connected to the mains grid, with your solar installer doing much of the work in terms of paperwork.

1. Network Approval

Your installer submits a Small Embedded Generation application through the SA Power Networks Portal. Standard applications can be automatically approved where the proposal meets SAPN’s technical requirements and there are no identified network constraints. Some sites in areas where the local grid is constrained, or on rural SWER lines, require additional assessment.

2. Installer To Contact Your Energy Retailer

Most SA homes now have smart meters, but analog “spinning dial” meters and older digital meters are required to be replaced when solar and/or a battery is installed. Also, if you have a smart meter and this is the first time solar is installed at the site, it will need to be remotely reconfigured to record exports. Your installer will send the SEG approval number along with other details to your energy retailer, who will arrange for your electricity meter to be changed or reconfigured.

3. Meter Installation Arrangements

If a meter changeover is required, your energy retailer will then arrange with their own sub-contractors to install your electricity meter. This used to take 4-6 weeks, but  varied depending on the retailer. Under the National Electricity Rules, the retailer must provide a meter installation for a new connection or perform a simple meter exchange by a date agreed on with you. In the absence of any agreement, the retailer is required to complete a simple meter exchange within 15 business days, or within 6 business days for a new connection.

In South Australia, a meter isolator is normally required for a customer-initiated meter installation associated with solar, so your installer should ensure a suitable isolator is present before a meter replacement.

Your solar power system can be installed before or after a new smart meter is installed or an existing smart meter is reconfigured.

4. System Installation

Once work on your solar system is completed, your installer should demonstrate to you that it works and instruct you on how to turn it on. Then, if your electricity meter has not already been replaced or reconfigured, it should be shut down. Once you receive confirmation that the meter is ready, you can switch it on. 

Sit back and enjoy the solar savings!

Note: If you haven’t done so already, you may wish to shop around for electricity deals as feed-in tariffs can vary retailer to retailer – and bear in mind the best feed-in tariff doesn’t always represent the best electricity deal overall for solar owners, especially if they also have a battery.