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Hot Water System Cost in Serpentine, WA: Heat Pump Prices & Rebates

Replacing a gas or electric hot water system in Serpentine? This guide covers heat pump pricing, because Western Australia rebates can make a heat pump one of the cheapest systems to run and cut the upfront cost sharply.

There are 80 plumbing and electrical businesses within 25km of Serpentine. 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.

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$2,400 - $4,600
After rebates
$2,900 - $5,300
Before rebates
$500 - $700
Total rebates available
28%
Homes with gas

Serpentine's warm temperate climate with moderate seasons suits heat pumps well: near-rated efficiency most of the year, with a small dip on cold mornings. Installed prices in Serpentine currently sit above the state average.

Serpentine is a quiet residential pocket in the Western Australia metropolitan area and one of the busier heat pump markets in the state.

Serpentine sits above the Western Australia average for installation costs. This typically reflects larger homes, more complex installations, or a preference for premium brands in the area.

With only 28% gas penetration, most Serpentine homes already use electric hot water. Switching from electric storage to a heat pump offers the biggest running cost savings in this area.

Available Rebates in Serpentine

Federal

Small-scale Technology Certificates (STCs)

Applied as a point-of-sale discount by your installer. Value varies by system type and climate zone.

$500 - $700
estimated value

Recommended Brands for Serpentine

iStore

Budget-conscious households wanting maximum rebate impact and simple installation

COP: 3.2Warranty: 5yrNoise: 50dB
$2,800 - $4,400
installed, before rebates

Rheem

Homeowners who want a reliable, well-supported mid-range option from a trusted Australian brand

COP: 3.5Warranty: 5yrNoise: 48dB
$3,200 - $4,800
installed, before rebates

Stiebel Eltron

Those who value German engineering and build quality at a mid-to-premium price point

COP: 3.8Warranty: 5yrNoise: 44dB
$3,500 - $5,000
installed, before rebates

Sanden

Those who want the absolute best efficiency and longest warranty, regardless of upfront cost

COP: 5.1Warranty: 15yrNoise: 38dB
$6,500 - $8,000
installed, before rebates

Reclaim Energy

Homeowners wanting premium Australian-designed quality with the quietest operation

COP: 4.5Warranty: 10yrNoise: 37dB
$6,600 - $8,000
installed, before rebates

Heat Pump Cost Calculator

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Frequently Asked Questions

How much does a heat pump hot water system cost in Serpentine?
A heat pump hot water system in Serpentine costs between $2,400 and $4,600 fully installed after all available rebates. Before rebates, expect to pay $2,900 to $5,300. The final price depends on the brand, tank size, and complexity of your installation.
What rebates are available for heat pump hot water in Serpentine?
Serpentine residents can access federal Small-scale Technology Certificates (STCs) worth $500-$700 as a point-of-sale discount. These rebates are typically applied by your installer at the point of sale.
Are heat pumps efficient in Serpentine's climate?
Serpentine has a warm temperate climate with moderate seasons. This climate zone offers good year-round heat pump performance. Moderate winters mean only a small seasonal efficiency drop. Most standard heat pump models will perform to specification. A typical household of 3-4 people will spend $200-$400 per year running a heat pump, compared to $800-$1,200 for gas or $1,200-$1,800 for electric storage.
How long does a heat pump installation take in Serpentine?
A standard heat pump hot water installation in Serpentine takes 3-5 hours for a straightforward replacement. If you're converting from gas, it may take a full day as the installer needs to connect new electrical circuits and potentially modify plumbing. Metro installers typically have availability within 1-2 weeks.
What size heat pump do I need for my Serpentine home?
For Serpentine in climate zone 5: 1-2 people need a 150-170L tank, 3-4 people need a 250-315L tank, and 5+ people should consider a 315-400L tank. Your warmer climate means the heat pump recovers quickly, so standard sizing works well.
Which heat pump brand is best for Serpentine?
Serpentine sits in climate zone 5, where all major brands perform well. For best value, iStore or Rheem offer competitive pricing with reliable performance. For premium quality, Sanden (best efficiency, CO2 refrigerant) or Daikin (10-year warranty, cold weather champion) are worth the extra investment. Rinnai has the widest installer network in metro areas, making service convenient.

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Helpful Guides

Complete Guide to Heat Pump RebatesWhat Size Heat Pump Do I Need?Best Heat Pump Brands in Australia (2026)7 Common Heat Pump ProblemsHow to Replace Your Gas Hot Water

More About Heat Pumps in Serpentine

Reclaim Energy in Serpentine$6,600 - $8,000Sanden in Serpentine$6,500 - $8,000Rheem in Serpentine$3,200 - $4,800iStore in Serpentine$2,800 - $4,400Stiebel Eltron in Serpentine$3,500 - $5,000Replace Gas in SerpentineReplace Electric in SerpentineReplace Solar in SerpentineFind Installers in Serpentine

Nearby Suburbs

MundijongByfordMandurahArmadale
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Heat Pump Hot Water Costs Across Western Australia

Compare installation costs in other Western Australia suburbs, or see the Western Australia cost guide for the statewide picture.

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