Who decides my solar export limit in NSW?

Your distribution network service provider — Ausgrid, Endeavour Energy or Essential Energy depending on where the property is — not your electricity retailer. The decision is made through a pre-approval application lodged by your installer before installation.

What is a typical export limit for a home in NSW?

Single-phase premises are commonly capped around 5 kW, while three-phase premises are allowed substantially more. Exact allowances vary by distributor and are revised periodically, and local network conditions can result in a lower limit than the published default.

What is a flexible export limit?

Instead of a fixed cap, your inverter responds to a signal from the network and adjusts export in real time. You typically get a much higher allowance most of the time in exchange for accepting curtailment when the local network is stressed. It requires an approved inverter and a reliable internet connection at the site.

Is solar still worth it with a zero-export limit?

Often yes, particularly for sites with strong daytime consumption. Self-consumed energy is worth your full import rate, typically several times the feed-in tariff. What a zero-export limit destroys is a business case that depended on export revenue, which is why the connection enquiry should come before the financial model.

Can I install a bigger system than my export limit allows?

Yes. The limit applies to what you send to the grid, not to what you generate or store. A larger array behind a limited inverter still improves morning, afternoon and overcast-day output, and pairing it with storage converts otherwise-curtailed generation into evening use.

Why does my inverter keep shutting down in the middle of the day?

Most commonly, grid voltage on your street has risen above the statutory limit and your inverter is tripping on over-voltage protection as designed. It usually indicates a local network condition rather than a fault in your system, and it should be reported to your distributor with the logged data.

Do export limits apply to batteries too?

Yes — the limit applies at the connection point, to everything behind it. A battery discharging to the grid counts against the same allowance as solar, and inverters are configured to the approved figure at commissioning. Batteries are also the standard response to a tight limit: they turn export you are not allowed to sell into evening consumption at full import value.

NSW Solar Export Limits & DNSP Rules Explained

There is a step between buying a solar system and being allowed to run it that most quotes treat as a formality. It is not. Your distribution network service provider — the DNSP that owns the poles and wires, not your electricity retailer — decides how much your system may export, and that decision can materially change the return you were shown.

Which network are you on?

Three distributors cover New South Wales. Your retailer is irrelevant here; the network is determined by geography.

NSW distribution network service providers
DNSP	Covers
Ausgrid	Sydney CBD, inner and northern suburbs, Central Coast, Hunter, Newcastle
Endeavour Energy	Greater Western Sydney, Blue Mountains, Southern Highlands, South Coast, Illawarra
Essential Energy	Regional and rural NSW, most of the state by area

You can confirm yours from your electricity bill — the distributor is named on it, usually alongside the fault line number.

Why limits exist

The low-voltage network was designed to deliver power outward from substations to homes. It was not designed for hundreds of homes on the same street pushing power back up the line simultaneously at 1pm.

When that happens, local voltage rises. If it rises past the statutory limit, two things follow: appliances on that street operate outside their design range, and inverters begin tripping off on over-voltage protection — frequently including the inverters causing the problem. Export limits are the network's blunt instrument for keeping voltage inside its legal envelope.

The practical symptom

If a neighbour complains their solar “keeps dropping out around midday”, that street is very likely already at its voltage ceiling. It is a strong signal that your own application will attract a constraint.

Single phase versus three phase

This is the largest single determinant of what you will be approved for.

Typical NSW residential export allowances
Connection	Common inverter allowance	Common export allowance
Single phase	Typically up to 5 kW per phase	Frequently capped, commonly at 5 kW
Three phase	Substantially higher, balanced across phases	Higher, but still subject to local conditions

Exact figures vary by distributor and are revised periodically, so treat the table as the shape of the rule rather than a quotable number. The stable principle is that three-phase premises have materially more headroom, and that the constraint is applied per phase.

Upgrading from single to three phase is possible but rarely trivial — it involves the network, a switchboard upgrade and often the service mains. Where a household is planning solar, a battery and an EV charger over several years, having that conversation once at the start is far cheaper than three separate upgrades.

Flexible exports

Distributors across the National Electricity Market have been shifting from fixed caps toward flexible or dynamic export arrangements. Instead of a permanent limit, your inverter accepts a signal from the network and adjusts its export in real time according to local conditions.

The trade-off is genuine on both sides. You typically receive a much higher export allowance most of the time, in exchange for accepting curtailment during the relatively rare periods when the local network is stressed. For most sites this nets out well ahead of a permanent fixed cap.

What it requires:

An inverter on the approved list for the relevant distributor's flexible export arrangement.
A reliable internet connection to the site.
Correct commissioning of the control interface — a step that is sometimes skipped and only discovered when the system is later found to be permanently curtailed.

The application process

Pre-approval application lodged by your installer with the DNSP, specifying inverter model, capacity and proposed export.
Network assessment against local conditions — transformer loading, existing generation on the feeder, voltage measurements.
Outcome: approved as proposed, approved with a lower export limit, approved with a flexible arrangement, or declined pending network work.
Installation and inverter configuration to the approved limit.
Certificate of Compliance for Electrical Work (CCEW) lodged by the licensed contractor.
Notification to the DNSP and your retailer, and meter reconfiguration so exports are actually recorded and paid.

The step people miss

Metering. A system can be installed, compliant and generating, and still not be paid for a single exported kilowatt-hour because the meter has not been reconfigured. If your feed-in credits do not appear on the first bill after commissioning, chase it immediately — retrospective correction gets harder with time.

If you are export limited

An export cap is not a reason to abandon the project. It changes the optimisation from “generate as much as possible” to “consume as much of your own generation as possible”, and there are several effective responses.

Add storage

An export cap limits what leaves the property. It does not limit what you generate or store. A battery converts otherwise-curtailed midday generation into evening consumption, which is worth several times the feed-in tariff anyway. Export limits are one of the strongest arguments for storage.

Shift load into daylight

Pool pumps, hot water, dishwashers, EV charging. On a constrained connection each unit moved into the generation window is worth the full import rate rather than a feed-in tariff you may not even be permitted to earn.

Keep the array, cap the inverter

Export limits apply at the point of connection, not to the array. A larger array behind a limited inverter still delivers more energy in the morning and evening shoulders and on overcast days — exactly when your load is more likely to absorb it.

Spread the orientation

East and west facing panels shift generation away from the midday peak toward morning and afternoon. On a capped connection this flattens the curve under the limit and increases total useful yield, even though it reduces theoretical peak output.

Commercial connections

Commercial applications are assessed differently and the outcomes are less predictable. Larger systems can trigger detailed technical studies, and zero-export arrangements are common where the local network has no capacity to accept generation.

A zero-export connection is entirely viable for a business with a strong daytime load — the energy is worth more consumed than exported anyway. It is fatal to a business case built on export revenue. The sequence that avoids this is straightforward: establish the likely connection outcome first, then build the financial model. Anyone who models the returns before making the enquiry is presenting a number they cannot support.

Questions to ask before you sign

Which DNSP is this property connected to, and is the connection single or three phase?
What export limit are you applying for, and what will you do if the network approves less?
Is the quoted return based on the requested export limit or an approved one?
Is the proposed inverter on the flexible-export approved list for this distributor?
Who lodges the pre-approval, the CCEW and the metering notification, and by when?
If the approved limit comes back lower, does the contract allow me to withdraw or renegotiate?

That last question is the one that matters most, and it is the one most rarely asked. A deposit paid before pre-approval is a deposit paid on an unknown outcome.

Sources & further reading

Ausgrid — connection of embedded generation and inverter energy systems
Endeavour Energy — small-scale embedded generation connection requirements
Essential Energy — embedded generation and export limit arrangements
AS/NZS 4777.1 and 4777.2 — grid connection of energy systems via inverters
NSW Fair Trading — Certificate of Compliance for Electrical Work requirements

Export limits and DNSP connection rules in NSW: what your network will actually approve