Northern Territory Solar Power System Grid Connection Rules & Process

Last Updated: 6th Oct 2026

The Northern Territory is an excellent location for solar, with high generation through the year, although in the Top End, it’s normally higher in winter than summer due to the wet season. Feed-in tariffs are also generous compared to the rest of the country.

Within its three main grids, properties can generally install up to 13.3 kW of rooftop solar, but can go much larger if they have three-phase power or a battery. Inverter and export limits in the NT are given on this page, along with the connection process for solar and batteries. 

Here are the pre-approved inverter and export limits for normal grid connections. Solar and battery systems within these limits have a simple and rapid approval process:

The above pre-approved connection limits allow for more than enough solar to keep your home air-conditioned and your drinks cool. But if you want something larger, a Negotiated Connection Application can be submitted for a system up to 2 MW. Expect to pay an assessment fee and wait months for approval.

NT Power and Water

Around 98% of grid-connected NT households have Power and Water as their electricity distribution network operator. In addition to a number of isolated micro-grids, it operates and maintains the Territory’s three main grids:

• Darwin-Katherine grid: Covers Darwin, Palmerston, and the Darwin rural area. Extends south to include Batchelor, Adelaide River, Pine Creek, and Katherine, with supply extending to Mataranka and Larrimah.
• Alice Springs grid: Alice Springs and surrounding rural areas.
• Tennant Creek grid: Tennant Creek and nearby rural areas.

Remote communities with their own micro-grids, separate from the NT’s three main grids, are treated differently and require pre-approval, due to potentially limited capacity to easily integrate additional rooftop solar.

Single-Phase Vs. Three-Phase Power

Most NT homes have single-phase power, while roughly 12% have three-phase. Power and Water allows three-phase properties to install higher total inverter capacity and export more, but have the following requirements:

• If the total inverter capacity is over 5 kW, it must be three-phase configured. In practice, this normally means three-phase inverters are used.
• The inverter capacity must be balanced between the phases.

Hybrid Inverters Vs. AC Coupled Battery Inverters

A hybrid inverter allows solar panels and batteries to share the same inverter capacity. But if a home has a separate AC-coupled battery, it will have its own inverter capacity that is also counted towards the total. So a single-phase household could stay within the 10 kW inverter limit by installing a 10 kW hybrid solar inverter plus batteries, or a 5 kW solar inverter plus an AC-coupled battery with a 5 kW battery inverter.

Total Solar Capacity Allowed

Nearly every solar system installed in Australia has its cost lowered by the solar rebate. If a solar system without batteries is installed using the solar rebate, its solar panel capacity can be a maximum of one-third more than the solar inverter capacity.  So, a home with a 10 kW solar inverter could install a 13.3 kW solar system. 

If a battery is installed with the solar system, the total panel capacity can be over 133% of the inverter’s capacity, provided the inverter manufacturer allows it, and still receive the solar rebate. So a home that installs a 10 kW solar inverter and a battery could potentially have solar panel capacity of 20 kW or more.

Export Limits

On the three main NT grids, single-phase properties can export up to 5 kW, while three-phase properties can export up to 7 kW. This means that for large solar systems, at times, the power consumed by the home plus what can be exported will be less than what can be produced. This extra power will not be generated by the solar inverter and effectively goes to waste. While this sounds like a serious problem, SolarQuotes estimates that a typical household with a 5 kW export limit, a 10 kW solar system, and no battery, will still consume or export around 93% of the solar energy that could be generated. With a 13.3 kW solar system, the amount would be around 81%.

For a three-phase home that can export 7 kW, with typical electricity consumption, and no battery, with a 13.3 kW solar system, we estimate it would use or export around 93% of solar energy that could be generated. With a 20 kW solar system, it would be around 76%.

The amount of solar power effectively going to waste can be reduced by shifting consumption to around midday. It can also be greatly reduced, or potentially eliminated, by installing a battery. 

NT Feed-in Tariffs & Panel Direction

Feed-in tariffs available in the NT are much higher than what’s received by most Australians. In 2026-27, the most common feed-in tariff is 9.33c per kWh exported to the grid for most of the day, but from 3 pm to 9 pm it doubles to 18.66c per kWh.

West-facing panels are often a good idea because most homes use more electricity in the afternoon than in the morning. But the high feed-in tariff from mid-afternoon makes west-facing ones especially attractive.

Households can discharge batteries to the grid to receive the feed-in tariff, although the property’s normal export limit applies.

The Territory’s high feed-in tariffs are likely to fall in the future as more solar and battery capacity is installed.

Battery Grid Charging Limits

Power and Water places strict limits on the rate batteries can be charged with grid power. The limit is 1 kW for single-phase properties and 3 kW for three-phase properties at all times. This does not apply to charging batteries with rooftop solar. 

This limit is likely to change in the future, but we don’t have information on when it may happen.

NT Solar Grid Connection Process

Solar power systems fall into three classes in the NT: Basic, Negotiated, Large Embedded Generation, and Transmission Connection. Outside of special circumstances, solar and battery installations for homes and most small businesses fall under Basic. 

Unfortunately, the Northern Territory charges high application and metering fees. In the 2026-27 financial year, these are likely to total $590 or more. 

1. Installer Submits The Connection Application

Most residential solar and battery installations fall under Power and Water’s Basic Micro Embedded Generation arrangements. The installer will normally complete and submit the Basic Connection Application using the technical details of the proposed solar/battery system. Power and Water says that once they have the retailer’s service order and all required documents, it can take up to 14 business days to schedule the connection work.

Power and Water charges a solar PV/battery application fee. In 2026-27, it is $213. 

2. Obtain Power And Water Approval And Arrange Meter Changeover/Reconfiguration

If you don’t already have a smart meter, your existing meter will need to be replaced. Your electricity retailer will send a service order/request, while Power and Water will arrange the metering work. If you have a smart meter, your electricity retailer will request that Power and Water remotely reconfigure it to record exports.

Most NT homes now have smart meters, but if you need one installed, in 2026-27, Power and Water charges $448 for a single-phase meter replacement and $519 for three-phase meter replacement. With the exception of Victoria, these are the highest meter replacement fees in the country. If you have a smart meter, there is a $376 fee for reconfiguring it to record exports, which is the highest fee for this service in the country by far. Your electricity retailer may also charge an administration fee, which is likely to be under $30.

3. System Installation And Inspection

Your installer, or a suitably qualified electrical contractor employed by them, installs and tests the approved system, completes the required commissioning information and issues an NT electrical Certificate of Compliance. NT WorkSafe receives a copy of the CoC. Installations may subsequently be selected for compliance auditing.

4. Arrange Solar Buyback With The Retailer

You will need to arrange with your electricity retailer to receive a feed-in tariff for surplus solar electricity your system exports to the grid. Normally, you will first need to provide them with an approved Power and Water connection agreement, and then they will ensure your electricity meter and account are configured for solar.