Why Is My Solar Export Limited to 1.5kW in NSW?

If a new or upgraded NSW solar system is subject to the 2026 communication requirements, an extended loss of its required internet connection can cause exports to be limited to 1.5kW. Some properties also have a fixed 1.5kW export approval. But exporting 1.5kW at one moment does not, by itself, prove that a limit is active: your home might simply be using most of the electricity generated.

Your solar system does two jobs: it generates electricity for your home and sends unused electricity into the grid. The electricity you generate, the electricity you use and the electricity you export are different figures. A 10kW-class system may generate several kilowatts at a sunny point in the day while exporting much less because the home is consuming the electricity or an approved export setting is restricting grid feed-in.

Example: If solar generates 4.5kW while the home uses 3kW, it might export 1.5kW without any export restriction. If exports repeatedly stop at exactly 1.5kW during strong sunshine when there should be surplus generation, an approved cap or communication fallback becomes more plausible. This is an illustrative energy-flow example, not a diagnosis from one app screenshot. Before assuming there’s a fault, check whether the number in your monitoring app is solar production or grid export. MPV Solar explains the distinction in How Much Should My Solar System Produce Each Day in Sydney?.

NSW has started introducing the Emergency Backstop Mechanism and a new Consumer Energy Resources (CER) Installer Portal for eligible new or upgraded rooftop solar systems. These changes are being introduced in phases and are designed to let compatible inverters communicate with electricity networks.

The portal’s commissioning requirements begin for relevant Endeavour Energy applications approved from 2 November 2026, and for Ausgrid and Essential Energy from 23 November 2026. Emergency Backstop requirements are phased separately by network and postcode; they do not suddenly apply to every existing solar system. See the NSW Government’s current CER Installer Portal guidance and MPV Solar’s broader guide to New NSW Solar Rules 2026.

Affected smart inverters need a reliable internet connection to communicate with the distribution network. If required communication remains unavailable, a protective export setting may restrict exports to 1.5kW until the connection is restored.

Common triggers include changing your internet provider, replacing the modem, updating the Wi-Fi password, switching off the router or having weak signal at the inverter. Your panels may still supply electricity to your household. The restriction primarily affects how much unused solar can be sent to the grid.

Yes. Not every 1.5kW reading means something is broken. For example, Endeavour Energy offers a fixed export option with a 1.5kW limit. Other site-specific connection approvals can also restrict exports.

Your installer should be able to confirm which export arrangement was approved, whether the system supports flexible exports and whether a communication-related fallback is active. See Flexible Solar Exports NSW 2026.

Look for a repeatable ceiling, not a single reading. Compare generation, home consumption and grid export on several sunny periods. Then check the approved export setting and whether the inverter has a communications warning. Not every installation measures household consumption directly.Start with the information you can review safely:

• Compare solar generation against the export figure in your app.
• Check whether the app has current data or an offline warning.
• Confirm your home internet and router are working.
• Think about whether the Wi-Fi name, password or modem recently changed.
• Find your original network approval or export setting if available.

Do not open the inverter, change grid-protection settings or attempt electrical repairs. If connection instructions supplied by the manufacturer do not resolve the issue, contact your installer.

What to distinguish first: Normal self-consumption, a documented fixed export approval, a communications fallback and an equipment or monitoring fault each need a different response. Approved network export settings cannot simply be overridden.

Potentially. If your system usually exports more than 1.5kW, a lower limit can reduce feed-in tariff credits. The effect depends on how much electricity you use at home during solar hours, your tariff and whether you have battery storage. An export restriction is also different from the Emergency Backstop being activated in a rare grid emergency. Both involve network controls, but they are not identical situations.

MPV Solar can review inverter monitoring, connection settings, export history and the condition of your solar system to help determine whether the reading is expected or needs attention.

If you are unsure, send our Sydney team your inverter model, a screenshot of your solar app and the approximate date the export figure changed. For general inverter communication faults, see MPV Solar’s existing Why Is My Solar Inverter Offline? article, or enquire about solar inverter and system repairs.