Flexible Exports in South Australia Explained

Key Takeaways

• Flexible Exports is a program specific to South Australia, managed by SA Power Networks.
• It allows dynamic adjustment of solar exports, potentially up to 10kW per phase.
• A reliable internet connection is required for your inverter to receive dynamic export limits.
• Your actual export capacity depends on your site and local network conditions.

What are Flexible Exports in South Australia?

Flexible Exports is a smart solar technology option available in South Australia, managed by SA Power Networks, the state's electricity distribution network provider. This program allows for the dynamic adjustment of solar exports from homes and businesses, potentially enabling systems to export up to 10kW back to the grid per phase. It became a standard service offering for new and upgrading small embedded generation solar customers in eligible areas on 1 July 2023. This means that any exporting solar system installed in South Australia from 1 July 2023 must be compatible with Flexible Exports, as per new regulations introduced by the South Australian Government.

It is important to note that these rules apply specifically to South Australia. Other Australian states and territories have their own electricity distributors and network rules, which may differ significantly. You can find the name of your electricity distributor on your electricity bill.

What is actually going on

Traditionally, solar systems have a fixed export limit, meaning they can only send a set amount of power back to the grid regardless of network conditions. However, when there is a high amount of solar energy being exported and low energy demand on the grid, this can create a mismatch between supply and demand, potentially leading to network instability or unplanned outages. This is often referred to as solar curtailment.

Flexible Exports addresses this by allowing your solar system's export limit to change dynamically throughout the day. SA Power Networks can turn exports down when there is an excess of energy on the grid and turn them up to the system's full export capacity (up to 10kW) at other times. This dynamic adjustment helps to manage the flow of solar energy into the network, supporting grid stability while allowing customers to maximise their solar exports when conditions permit.

For this dynamic adjustment to work, your Flexible Exports compatible system requires a reliable internet connection. This connection allows your inverter to receive the real-time export limits from SA Power Networks. If your internet connection is lost, your solar exports will automatically ramp down to 1.5kW until the connection is restored.

The dynamic export behaviour

Flexible Exports systems do not have fixed export limits in the same way traditional systems do. Instead, their export capacity is managed dynamically by SA Power Networks.

What you can check yourself, and what you cannot

As a homeowner, you can check your inverter's internet connection status. Many modern inverters have indicator lights or a display that shows connection status. You can also check your home internet service to ensure it is operational. If your internet is down, your solar system's export will be limited to 1.5kW.

However, you cannot directly control or adjust the dynamic export limits set by SA Power Networks. These limits are managed remotely by the network operator based on real-time grid conditions. You also cannot change your inverter's grid-protection settings yourself. These settings are configured by an accredited installer to comply with Australian standards (such as AS/NZS 4777.2) and your connection agreement. Attempting to change them can breach your agreement and compromise network safety.

If you are experiencing persistent low export levels or believe your system is not operating as expected under Flexible Exports, you should contact your accredited solar installer or electricity retailer. Due to the technical nature of the information required for connection forms and system adjustments, an installer or electrical consultant must complete these processes on your behalf.

What the published sources do not tell you

While SA Power Networks provides clear information on the Flexible Exports program, some specific details are not publicly available. For instance, the exact legislative document from the South Australian Government that mandates Flexible Exports compatibility from 1 July 2023 is referenced but not directly linked or quoted in the provided materials.

Furthermore, the detailed technical specifications for each embedded generation size class (e.g., specific technical standards or sample documentation) are mentioned as available on SA Power Networks' site but are not provided in the general public information. The specific voltage trip thresholds for inverters, which are part of grid-protection settings, are defined in paid standards like AS/NZS 4777.2 and are not published by SA Power Networks. Your installer or distributor can confirm what is configured on your inverter.

The actual export capacity available to your system under Flexible Exports can vary significantly. Factors such as the size of your installed system, your household's electricity usage patterns, the volume of solar installations in your specific area, and other network capacity factors all play a role. SA Power Networks states that some sites may never be able to reach the full 10kW export limit, and some may not be able to export at all. They also anticipate that future export capacity will fall as more solar customers connect and select Flexible Exports.