Hot Water Systems in Hewett
The 5118 postcode, covering Hewett, Bibaringa, Buchfelde, Concordia, Gawler, Gawler Belt, Gawler East, Gawler River, Gawler South, Gawler West, Kalbeeba, Kangaroo Flat, Kingsford, Reid, Ward Belt and Willaston and surrounding areas, is home to around 7,926 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 Hewett and the 5118 area, 791 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 Hewett's climate delivering an average of 4.9 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 5118
8th
State Wide
377th
Australia Wide
Hot Water Installation Hewett
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 Hewett
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterHewett
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 Hewett
Compare heat pump hot water systems suitable for Hewett'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 - Hewett, 5118
Hot Water Demographics - Hewett
Based on the Australian Bureau of Statistics 2021 Census (ABS), Hewett has around 7,926 private dwellings, home to approximately 18,117 people. With an average household size of 2.5 people, and around 50 litres of hot water used per person each day in Australia, Hewett households use approximately 125 litres of hot water daily, equating to a massive 1.0 million litres of hot water used across the suburb every single day.
Other census insights reinforce Hewett's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Hewett community is home to 1,388 couple families with children and 451 one-parent families, meaning a large proportion of households face substantial hot water demand. With 3,201 homes owned with a mortgage and 2,390 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.
Hewett is converting hot water demand to efficient systems faster than many peers, with 10.0% of dwellings already upgraded.
Hot water systems in Hewett
Across Hewett and the 5118 postcode, more locals are switching to energy efficient hot water systems to get away from rising energy costs and ageing gas units. With most of the 7,440 dwellings being separate houses and an average household size of 2.5 people, hot water demand is steady year‑round, especially for busy families and downsizers. Upgrading from an old gas or electric hot water system to a modern heat pump hot water system, solar hot water system or efficient electric hot water system is becoming the logical next step.
Hewett gets excellent sunshine, with average annual solar exposure around 17.5 MJ/m² per day, or roughly 4.8 kWh/m² of solar energy daily. That strong solar resource means both a solar hot water heating system and a quality heat pump hot water system can perform very well here. For households with median weekly family incomes around $1,959 and many homes owned with a mortgage, cutting running costs without sacrificing comfort is a big drawcard, and annual hot water energy savings can easily reach hundreds of dollars when you move to an energy efficient hot water system.
In this part of SA, separate houses with three and four bedrooms dominate, so showers, dishwashers and washing machines all add up. Hot water energy use can account for a quarter or more of a typical home’s electricity or gas bill. That is why more Hewett homeowners are comparing heat pump vs solar hot water and even solar hot water vs electric hot water to find the most efficient hot water system for their needs. Brands like Sanden heat pump systems and Rheem heat pump hot water are popular with households chasing the best heat pump hot water system, while Rheem solar hot water, Rinnai solar hot water and Chromagen solar hot water units are common choices for a reliable solar hot water installation. For those wanting a simpler all‑electric home, a modern electric hot water system with smart controls can pair well with rooftop solar.
Typical annual bill savings in Hewett can look like this:
• Replacing an old electric hot water system with a heat pump hot water system: save roughly $350–$700 per year. • Switching from gas to a heat pump hot water system: save around $250–$600 per year. • Switching from gas to a solar hot water system: save about $200–$550 per year. • Upgrading an old electric hot water system to a new electric hot water installation and running it mostly on solar: save roughly $250–$500 per year.
Recent installs in Hewett show this shift in action. There have already been 791 efficient hot water installations (heat pump and solar) recorded in the 5118 area. Installations climbed strongly through the 2000s, with notable peaks around 2003 and 2009, and have continued at a steady pace from 2020 through to 2025. This long‑term trend reflects growing local interest in electrification, lower running costs and hot water SA households can rely on without the volatility of gas prices.
Hot Water Rebates, Tariffs & Savings
Across Hewett, more people are replacing old gas or electric units with heat pump hot water, modern electric hot water systems and solar hot water systems as hot water installation costs come down and incentives improve. Australian Government Small‑scale Technology Certificates (STCs) can reduce the upfront solar hot water price / cost or heat pump hot water price / cost at the point of sale. On top of that, SA‑based schemes and retailer offers can effectively act as a solar hot water rebate, heat pump hot water rebate or even an electric hot water system rebate for qualifying upgrades. Together, these hot water rebate SA incentives can knock a substantial percentage off the hot water system price / cost and shorten payback periods to just a few years, especially if you run your system on daytime solar or use timers and solar‑diversion controls.
Whether you need hot water repair on an older unit, a solar hot water tank replacement, a fresh heat pump hot water installation or straightforward electric hot water installation, it pays to get tailored advice. If you are weighing up electric hot water vs gas hot water or trying to decide on the best hot water system Australia for your Hewett home, now is an ideal time to explore your options.
If your current unit is ageing, noisy or costing too much to run, it is worth checking whether your Hewett home is ready for a hot water upgrade. A well‑designed heat pump hot water system, solar hot water system or efficient electric hot water system can cut bills, reduce emissions and future‑proof your place as energy prices change. Talk with experienced local hot water installers and repair specialists who understand hot water SA conditions, rebate options and brands like Sanden, Rheem and Rinnai. Connect with trusted local experts for personalised advice, hot water repair, solar hot water repair or a smooth new hot water installation that suits your budget and your household.