Hot Water Systems in Carnegie
The 3163 postcode, covering Carnegie, Booran Road Po, Glen Huntly and Murrumbeena and surrounding areas, is home to around 15,914 households. With many households already generating their own clean solar power, many are now looking at how they can make their entire home energy system more efficient, with hot water heating often the logical next step.
With hot water roughly accounting for a quarter of the average home's energy use, switching to an energy-efficient hot water system is one of the biggest opportunities for savings. Across Carnegie and the 3163 area, 653 homeowners have already switched from older electric storage and gas hot water systems to solar hot water or air-source heat pump systems that draw on clean, renewable power while also claiming the hot water rebates to reduce their hot water heater system cost. These highly-efficient systems not only help cut energy bills but also reduce carbon emissions and improve overall energy independence.
With Carnegie's climate delivering an average of 4.2 kWh/m² per day, conditions are ideal for hot water systems and hybrid heat pump systems that harness both sunlight and ambient air temperature to heat water efficiently all year round. When paired with existing rooftop solar power or solar batteries, the result is hot water that costs far less to run and is powered by clean, self-generated energy.
Hot Water Ranking
Postcode 3163
117th
State Wide
463rd
Australia Wide
Hot Water Installation Carnegie
Estimated daily energy to heat household water, comparing a resistive electric element with a high-efficiency heat pump. Demand shifts month-to-month using local climate patterns.
Energy Efficient Hot Water & Solar Power Carnegie
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterCarnegie
Illustrates how a typical 6.6 kW rooftop solar system can offset the daytime energy demand of a COP 5 heat pump hot water unit.
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Heat Pump Hot Water Systems for Carnegie
Compare heat pump hot water systems suitable for Carnegie's climate. These energy-efficient systems are designed to work in local temperature conditions and can significantly reduce your hot water energy costs.
Community Hot Water Statistics - Carnegie, 3163
Hot Water Demographics - Carnegie
Based on the Australian Bureau of Statistics 2021 Census (ABS), Carnegie has around 15,914 private dwellings, home to approximately 31,245 people. With an average household size of 2.2 people, and around 50 litres of hot water used per person each day in Australia, Carnegie households use approximately 110 litres of hot water daily, equating to a massive 1.8 million litres of hot water used across the suburb every single day.
Other census insights reinforce Carnegie's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Carnegie community is home to 2,650 couple families with children and 378 one-parent families, meaning a large proportion of households face substantial hot water demand. With 4,203 homes owned with a mortgage and 3,771 owned outright, many residents also have the homeownership and growing equity that make switching to efficient hot water systems a practical way to lower expenses.
Carnegie is converting hot water demand to efficient systems faster than many peers, with 4.1% of dwellings already upgraded.
Hot water systems in Carnegie
Across Carnegie, more homeowners and businesses are rethinking their hot water system and moving away from old gas or power‑hungry electric units. With an average household size of around 2.2 people and more than 14,000 dwellings, reliable and efficient hot water is a big part of everyday life. Rising energy costs and strong local interest in sustainability mean options like a heat pump hot water system, solar hot water system and modern electric hot water system are becoming the logical next step for many homes.
Carnegie’s climate helps too. Nearby Caulfield Racecourse records an average annual solar exposure of about 15.1 MJ/m² per day, which is roughly 4.2 kWh/m² per day. That level of sunlight supports excellent performance from both a solar hot water heating system and high‑efficiency heat pump hot water. For families juggling mortgages (with a median monthly repayment over $2,000) and renters watching every bill, upgrading from an older gas or electric unit can deliver meaningful annual hot water energy savings without sacrificing comfort.
In 3163, the mix of separate houses and thousands of flats and apartments means there is no one‑size‑fits‑all solution. Smaller apartments often lean towards compact electric hot water installation, while larger family homes can benefit from a dedicated heat pump hot water installation or full solar hot water installation with roof collectors and a well‑sized solar hot water tank replacement. Brands like Rheem solar hot water and Rinnai solar hot water are popular on established homes, while Sanden heat pump and Thermann or EvoHeat style systems are often chosen by households chasing the most efficient hot water system with very low running costs.
When you look at heat pump vs solar hot water, local roof space, shading from trees, and existing solar PV all matter. A solar hot water system can be ideal for sunny, unshaded roofs, while a best heat pump hot water system can suit shaded sites or multi‑unit buildings with limited roof area. Many Carnegie homes already have rooftop solar, so pairing a smart electric hot water system or heat pump with daytime solar can turn excess generation into free showers, making solar hot water vs electric hot water a much closer contest on cost.
Recent installation data shows this is more than just talk. There have been 653 efficient hot water installations (heat pump and solar) recorded in the Carnegie postcode, with strong growth from 2007 onwards. Install numbers peaked around 2009, 2010 and again in 2015 and 2018, and there has been steady activity through to 2024 and 2025. This trend reflects growing local interest in electrification, lower running costs and energy efficient hot water system choices that support an all‑electric home.
For a typical Carnegie household, hot water can account for a quarter or more of total energy use. Swapping to a modern system can trim bills significantly. Typical annual bill savings can look like this:
• Old electric to heat pump hot water system: save around $350–$700 per year • Gas to heat pump hot water system: save around $250–$550 per year • Gas to solar hot water system: save around $200–$500 per year • Old electric to modern electric hot water with rooftop solar: save around $200–$450 per year
Of course, every home is different and hot water system price or cost will vary with size, brand and installation complexity. A quality heat pump hot water price or cost is usually higher upfront than a basic electric unit, but much lower to run. Likewise, a solar hot water price or cost is higher again but can be very attractive when combined with rebates and good solar exposure. Many Carnegie households find that when they factor in lower bills, they are effectively paying for the upgrade out of their energy savings.
Hot water repair and replacement are common triggers to rethink your setup. If your old tank is leaking or your gas burner is on its last legs, it can make more sense to upgrade to an energy efficient hot water system than to spend money on another short‑lived repair. Local installers can help you compare options like Rheem heat pump hot water, Rinnai solar hot water, Sanden heat pump and Chromagen solar hot water against your current electric hot water vs gas hot water costs, and work out the best hot water system Australia has to offer for your particular home.
Hot Water Rebates, Tariffs & Savings
Carnegie residents are increasingly taking advantage of incentives to move from older gas and electric units to efficient options like heat pump hot water, solar hot water or high‑efficiency electric hot water. Australian Federal Government Small‑scale Technology Certificates (STCs) apply to eligible systems, effectively acting as an upfront discount. On top of that, Victorian programmes can offer a heat pump hot water rebate or solar hot water rebate, and in some cases an electric hot water system rebate, to reduce the initial outlay even further.
For many households, these hot water rebate VIC schemes can cut the system cost by a substantial percentage, sometimes shaving thousands off the invoice. That means payback periods can drop from ten years or more down to just a handful of years, especially when you combine rebates with solar PV and smart controls. Using timers or solar‑diversion devices to run your heat pump or electric hot water system during the middle of the day lets you soak up cheap or free solar power, further improving savings and making your hot water VIC bills much easier to manage.
If you are in Carnegie and your current unit is ageing, noisy or expensive to run, it is a good time to check whether your home is ready for a hot water upgrade. Whether you are switching from gas to a heat pump, adding a solar hot water heating system, or planning an electric hot water installation that works with your rooftop solar, experienced local hot water installers can guide you through the options. With growing interest in sustainability and strong solar potential in the area, efficient hot water systems can help you cut bills, reduce emissions and future‑proof your home. Reach out to trusted local experts for personalised advice and see which rebates and systems will work best for your place in Carnegie.