A letter or email asking you to arrange an inverter test can feel like another cost attached to owning solar. But if you are asking who needs anti islanding compliance, the short answer is: solar owners whose grid-connected system has been identified by the electricity network as requiring verification. It is not a sales exercise or an optional performance check. It is a safety requirement that helps ensure your system disconnects from the grid when it should.

For Canberra and ACT solar owners, the usual trigger is a notification from Evoenergy requesting anti-islanding testing. If you have received one, arrange the test within the stated timeframe. Leaving it unattended can create compliance issues and may put continued grid connection at risk.

What anti-islanding compliance actually means

Your solar inverter does more than turn panel-generated DC power into usable AC electricity. It continually monitors the electricity grid. When the grid supply fails – because of a fault, planned work or storm damage – a compliant inverter must stop exporting power quickly.

This is called anti-islanding protection. An “island” is a section of local network that remains energised by a private generator, such as rooftop solar, even though the wider grid has gone down. That situation can be dangerous for line workers trying to repair a fault. It can also cause unstable voltage and frequency conditions that may damage equipment.

Anti-islanding compliance confirms that the inverter’s protection settings and shutdown response are working as required. The test is completed at the inverter by a qualified electrician using appropriate test equipment. It is not the same as simply looking at the inverter screen, checking that panels are producing power, or confirming that there are no error messages.

Who needs anti-islanding compliance?

The people who most clearly need anti-islanding compliance are owners of grid-connected solar systems who have received a network notice requesting it. These notices are commonly issued for systems with particular inverter models, installation eras or network connection conditions. The network may need confirmation that the inverter continues to meet the applicable protection requirements as equipment ages and standards change.

This can include homeowners with a standard rooftop system, landlords with solar on a rental property, small businesses, strata-managed properties, and sites with multiple inverters. A system does not need to be large to need testing. A modest home system can still export electricity and must safely disconnect during a network outage.

Older systems deserve particular attention. Inverters, isolators, cabling and communications equipment all experience heat, cold, moisture and electrical wear over time. Canberra’s hot summers, frosts and severe weather can expose weak points in outdoor electrical equipment. A system that has quietly generated for years may still need its safety response verified.

If you have received an Evoenergy notification

Treat the notice as an action item. It will generally identify what is required and provide a due date or response timeframe. Book a qualified electrician experienced in solar inverter testing, keep a copy of the notification available, and make sure the test results are submitted or recorded in the required format.

Do not assume your original installer is the only business able to help. Many installation companies focus on new systems and may no longer service older equipment. The key requirement is a licensed electrician with the right solar and testing capability, who can perform the work correctly and provide clear documentation.

If you have not received a notice

You may not currently need a formal anti-islanding compliance test. That does not mean your solar system should be ignored. If your inverter is ageing, has shown faults, has been affected by hail or water ingress, or has stopped producing as expected, a system health check is sensible.

There is also a difference between being compliant today and being able to prove compliance when requested. Regular inspection helps identify issues before a network notice, insurance claim or inverter failure turns a small problem into a more expensive repair.

Systems that need a closer look

Some solar systems have a higher chance of needing investigation before or during testing. If your inverter has been replaced, settings have been changed, the system has expanded, or a battery has been added, protection settings should be checked as part of the electrical work. Alterations can affect how equipment interacts with the grid.

Multi-inverter systems also require care. Each inverter must be assessed properly, rather than assuming one passing result covers the entire installation. On larger homes and small commercial premises, systems may have been added in stages, with different inverter brands or ages in service.

Physical condition matters too. Cracked isolator housings, UV-damaged cable, loose fittings, signs of water entry and weather-related panel damage may not stop an inverter from generating immediately, but they are not issues to leave unresolved. An electrician may identify these while accessing the system for compliance testing.

What happens during an anti-islanding test?

A proper test begins with confirming the system details and checking that the inverter is safe to access. The electrician then carries out the required protection testing to verify that the inverter responds correctly when grid conditions move outside acceptable limits.

Depending on the system and the required test method, this can include checking disconnection behaviour under simulated voltage and frequency conditions, reviewing relevant inverter settings, and confirming the installation’s basic electrical condition. The aim is to establish that the inverter will not continue energising the network during an outage.

Once testing is complete, the result needs to be documented. A pass provides the evidence required for the network’s compliance process. If the inverter does not pass, the next step depends on the fault. It may be a settings issue, a component problem, an installation defect, or an inverter that is no longer capable of meeting the required standard.

That distinction matters. Replacing an inverter before checking the cause can waste money. Equally, repeatedly resetting an inverter that cannot meet protection requirements is not a solution. Good testing identifies the issue first, then gives you a practical repair or replacement path.

Compliance testing is different from a solar performance check

Anti-islanding testing is focused on electrical safety and grid protection. It does not automatically tell you whether every panel is producing at its best, whether a string has degraded, or whether your system’s generation is lower than it should be.

A full solar health check goes further. It may investigate output history, inverter faults, visible panel condition, isolators, wiring, rooftop components and signs of water ingress or storm damage. For an owner dealing with disappointing bills or unexplained low generation, that broader assessment often has more financial value than compliance testing alone.

The sensible approach depends on your reason for booking. If you have a network notice and the system appears healthy, the required anti-islanding test may be all you need. If the system is older, underperforming or has had a hard time through hail or weather, combining compliance work with a detailed inspection can reduce repeat call-outs and help protect the return on your solar investment.

What to do before the electrician arrives

Make access straightforward where possible. The inverter should be accessible, and any gates, garages or utility areas needed to reach equipment should be unlocked. Keep your network notification handy. If you know the inverter model, installation date, or have records of previous faults and repairs, those details can help.

It is also worth checking your monitoring app before the appointment. Note any recurring warnings, unusual production drops or periods when the system stopped reporting. Monitoring data is useful context, but it does not replace electrical testing.

Avoid attempting to change inverter settings yourself. Solar equipment contains live electrical components, and incorrect settings can affect both safety and network compliance. A licensed electrician should assess and adjust protection settings where necessary.

Choose a specialist who can give a clear outcome

The right service should leave you knowing whether the system passed, what evidence has been produced, and what needs to happen if it did not. Ask whether the provider is licensed, whether they perform the required anti-islanding test rather than a visual check, and whether they can investigate related faults if one is found.

Solar Testing and Maintenance focuses on post-installation testing and fault finding, so ACT owners can get a practical assessment rather than a generic sales conversation. The goal is simple: confirm your system is safe to remain connected, identify any problems honestly, and help you make a sensible decision about repairs.

A network notice is a good reason to act promptly, but it can also be a useful checkpoint for an ageing solar system. Arrange the required test, keep the paperwork, and use the visit to address any warning signs before they affect safety, compliance or your next electricity bill.