Heat Pump Hot Water in the Northern Territory (2026): cost, rebates and what to know

By PumpSwap. Updated 23 September 2026. How we check

In the Northern Territory, a heat pump hot water system typically costs $2,600 - $5,200 installed after rebates. At NT energy prices a four-person home pays about $316 a year to run it, against $846 for gas storage and $1,230 for electric storage. That saves about $530 a year against gas storage and $914 against electric storage, so the extra cost over a like-for-like swap is paid back in roughly 2.9 years against gas and 2.5 against electric at these averages. A premium model or low hot water use stretches that towards the 3 to 5 years most households see.

A typical Northern Territory suburb has 119 plumbing and electrical businesses within 25km. You do not need to ring around them. Tell us about your system and up to 3 who cover your street will send you a quote.

$2,600 - $5,200

modelled installed price after NT rebates

$316 a year

to run, four-person home, at 29c/kWh

$2,600 - $5,200

full range across 36 Northern Territory suburbs

Are heat pumps worth it in the Northern Territory?

The case rests on running cost. A heat pump moves heat from the air instead of making it, so it uses a fraction of the electricity of an element. At NT energy prices (29c/kWh electricity, 4c/MJ gas), a four-person home that uses about 200 litres of hot water a day pays roughly:

System	Running cost a year	Installed cost
Heat pump	$316	$2,600 - $5,200 after rebates
Gas storage	$846	$1,200 - $3,500
Electric storage	$1,230	$800 - $2,500

That saves about $530 a year against gas storage and $914 against electric storage, so the extra cost over a like-for-like swap is paid back in roughly 2.9 years against gas and 2.5 against electric at these averages. A premium model or low hot water use stretches that towards the 3 to 5 years most households see.

About 10% of Northern Territory households are on mains gas, so for most of them the comparison is with gas storage.

In July, usually the coldest month, Darwin averages a minimum of 19.3°C at the Bureau of Meteorology's Darwin Airport station, and in January a maximum of 31.8°C. A heat pump never sees cold-weather conditions here and the boost element is rarely needed. Bureau of Meteorology, climate statistics for Darwin Airport

Running costs are PumpSwap's model at the state average tariffs above, for a 45°C temperature rise and a heat pump coefficient of performance of 3.5. Your tariff and usage will move the numbers.

What a hot water system costs installed in Darwin and the Northern Territory (2026)

System	Installed, before rebates	Rebates
Heat pump	from $2,500 (brands below); $2,600 - $5,200 after rebates	Federal STCs
Electric storage	$800 - $2,500	None
Gas storage	$1,200 - $3,500	None
Gas continuous flow	$1,500 - $3,000	None
Solar hot water	$4,000 - $7,500; $3,500 - $6,000 after STCs	Federal STCs

National installed bands for the other systems come from the two 2026 cost guides in the sources below. The heat pump figures are PumpSwap's modelled prices for the Northern Territory.

Modelled heat pump prices across Northern Territory

Area	After rebates
Palmerston	$2,700 - $4,800
Alice Springs	$3,200 - $5,200
Katherine	$3,100 - $5,200
Humpty Doo	$3,000 - $5,200
Howard Springs	$2,900 - $5,100
Darwin CBD	$2,900 - $5,000
Durack	$2,600 - $4,700
Karama	$2,700 - $4,800

Heat pump rebates in the Northern Territory

The Northern Territory has no territory heat pump hot water incentive in 2026. The federal STC discount, typically $500 to $800, is taken off the installer's quote. The NT Home and Business Battery Scheme covers batteries, not hot water.

The federal STC discount is typically $500 to $800 for a 2026 install and steps down every 1 January until 2030. Darwin postcodes are in Clean Energy Regulator zone 1 for air source heat pumps, the warmest of the five zones, and on the regulator's register a model earns fewer certificates in warmer zones. Clean Energy Regulator, postcode zones for solar water heaters and heat pumps

Northern Territoryheat pump rebates: who qualifies, how to claim, and what is changing →

Heat pump brands sold in the Northern Territory

Installed prices before rebates, from PumpSwap's model. Warranty years are the maker's tank and compressor terms; noise is the quietest model's rated level.

Brand	Installed, before rebates	Warranty (tank / compressor)	Sizes	Noise
MideaChina	$2,500 - $4,100	5 / 5 years	170, 200, 280L	50 dB
EmeraldAustralia	$2,750 - $3,750	7 / 5 years	220, 270, 320L	49 dB
iStoreAustralia	$2,800 - $4,400	5 / 5 years	180, 270L	49 dB
ChromagenIsrael	$2,800 - $4,200	5 / 5 years	170, 235, 280L	48 dB
HaierChina	$3,000 - $3,650	7 / 5 years	195, 246, 330L	43 dB
ApricusAustralia	$3,000 - $3,250	6 / 6 years	260L	43 dB
RheemAustralia	$3,200 - $4,800	10 / 5 years	180, 270L	47 dB
QuantumAustralia	$3,250 - $4,450	5 / 2 years	150, 200, 270, 340L	48 dB
DuxAustralia	$3,300 - $3,850	7 / 3 years	200, 270, 285L	Not published
RinnaiJapan/Australia	$3,350 - $6,000	7 / 5 years	250, 280, 340L	45 dB
Stiebel EltronGermany	$3,500 - $5,000	5 / 5 years	302L	44 dB
DaikinJapan	$5,500 - $8,500	10 / 10 years	250, 315L	40 dB
SandenJapan	$6,500 - $8,000	15 / 6 years	250, 315L	37 dB
Reclaim EnergyAustralia	$6,600 - $8,000	10 / 5 years	315L	37 dB

Beware of quotes that look too cheap

Because rebates come off the price, the Northern Territorysees advertised "from" prices that leave out half the job. Before comparing quotes, check each one covers:

removing and disposing of the old system, and capping the gas line if you are leaving gas
any electrical work, including a new circuit if the switchboard needs one
a tempering valve and the pipework changes for a new tank position
a base or pad for the unit, and the outdoor position that keeps noise away from bedrooms
every rebate as its own line, with the model's certificate count, so you can see what was assigned to the installer

Two installers quoting the same model can differ by more than the rebate. That is why PumpSwap sends your request to up to 3 local installers rather than showing one price.

The downsides, in the Northern Territory

Noise. The outdoor unit is a small compressor and fan, and each brand's quietest model is rated between 37 dB and 50 dB, on the makers' own figures. It runs in bursts to reheat the tank, so position it away from bedrooms and a neighbour's windows, and set it to run in the day if you have solar.

Recovery time. A heat pump reheats a tank more slowly than gas, which is why sizing matters: a 270L or 315L tank suits most three to four person homes, and larger homes go bigger rather than relying on the boost element.

Cold nights. In cold weather the unit draws less heat from the air and works harder, and many models switch on an electric boost element on the coldest nights, so winter running costs sit above the annual average. In July, usually the coldest month, Darwin averages a minimum of 19.3°C at the Bureau of Meteorology's Darwin Airport station, and in January a maximum of 31.8°C. A heat pump never sees cold-weather conditions here and the boost element is rarely needed.

Water quality. Power and Water says the Territory's groundwater supplies are characterised by hard water, with surface water softer and blended where possible, so check the tank warranty's water quality conditions before you buy. Power and Water, water quality

Space. Most units are a single tank with the heat pump on top, taller than the gas or electric tank they replace; split systems put the compressor beside the tank and need a little more room.

Who can install a heat pump in the Northern Territory

In the Northern Territory only advanced tradesman licence holders may contract for and carry out plumbing work. NT WorkSafe issues a restricted electrical endorsement for disconnecting and reconnecting water heaters, which does not cover installation work. NT Plumbers and Drainers Licensing Board, licensing and NT WorkSafe, electrical licences and endorsements

Northern Territory heat pump questions

Is a heat pump hot water system worth it in the Northern Territory?

How much does a heat pump cost installed in Darwin?

PumpSwap's modelled installed price after rebates in the Northern Territory is $2,600 - $5,200, and across 36 Northern Territory suburbs it runs from $2,600 - $5,200. The brands sold here start from $2,500 installed before rebates. The exact price depends on the model, your home and the installer, which is why we show quotes rather than one number.

What heat pump rebates are available in the Northern Territory?

Does a heat pump hot water system work in Darwin's winter?

Yes. In cold weather a heat pump draws less heat from the air and works harder, and many models switch on an electric boost element on the coldest nights, so winter running costs sit above the annual average. In July, usually the coldest month, Darwin averages a minimum of 19.3°C at the Bureau of Meteorology's Darwin Airport station, and in January a maximum of 31.8°C. A heat pump never sees cold-weather conditions here and the boost element is rarely needed. Heat pumps also earn more federal certificates in colder climate zones, because they displace more electric heating there.

How noisy is a heat pump hot water system?

Across the brands sold in the Northern Territory, each brand's quietest model is rated between 37 dB and 50 dB, on the makers' own figures. Makers measure at different distances, so treat the numbers as a guide rather than a like-for-like ranking. The outdoor unit runs in bursts, mostly when hot water is being reheated, so where it sits and when it runs matter more than the number.