Hot Water Systems in South Lake
The 6164 postcode, covering South Lake, Atwell, Aubin Grove, Banjup, Beeliar, Cockburn Central, Hammond Park, Jandakot, Success, Treeby and Yangebup and surrounding areas, is home to around 24,340 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 South Lake and the 6164 area, 4,253 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 South Lake's climate delivering an average of 5.3 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 6164
6th
State Wide
28th
Australia Wide
Hot Water Installation South Lake
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 South Lake
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterSouth Lake
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 South Lake
Compare heat pump hot water systems suitable for South Lake'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 - South Lake, 6164
Hot Water Demographics - South Lake
Based on the Australian Bureau of Statistics 2021 Census (ABS), South Lake has around 24,340 private dwellings, home to approximately 62,814 people. With an average household size of 2.8 people, and around 50 litres of hot water used per person each day in Australia, South Lake households use approximately 140 litres of hot water daily, equating to a massive 3.4 million litres of hot water used across the suburb every single day.
Other census insights reinforce South Lake's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The South Lake community is home to 7,016 couple families with children and 1,447 one-parent families, meaning a large proportion of households face substantial hot water demand. With 12,414 homes owned with a mortgage and 4,491 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.
South Lake is converting hot water demand to efficient systems faster than many peers, with 17.5% of dwellings already upgraded.
Hot water systems in South Lake
Across South Lake and the wider 6164 area, more households are swapping old gas and electric units for a modern hot water system that is cheaper to run and kinder to the environment. With an average household size of around 2.8 people and more than 22,000 occupied dwellings, reliable hot water is a big part of daily life. At the same time, power prices are biting, even for households on a solid median income of about $2,210 per week, so an energy efficient hot water system is becoming an obvious next upgrade after rooftop solar.
South Lake is well placed for efficient hot water. The local climate data from nearby Murdoch shows mean daily solar exposure of about 19.2 MJ/m², which is roughly 5.3 kWh/m² of sun per day over the year. That strong solar resource supports both a solar hot water system and a heat pump hot water system, especially when paired with existing solar PV. Families paying a typical $1,950 a month mortgage are looking for long‑term savings, and moving from older gas or off‑peak units to a modern heat pump hot water system or solar hot water heating system can trim a big chunk off annual energy use.
In South Lake and surrounding suburbs, most homes are separate houses with three or four bedrooms, so hot water demand is steady, especially for families with kids. Many properties still run gas or an older electric hot water system, but the share of homes installing efficient options is growing. Brands like Rheem, Rinnai, Sanden and Thermann are common on quotes and installs, whether you are looking at a compact rheem heat pump hot water unit, a roof‑mounted rinnai solar hot water system, a premium sanden heat pump, or a rheem solar hot water package with ground tank. Locals increasingly ask about the best hot water system Australia can offer for their situation, and how heat pump vs solar hot water stacks up over time.
For a rough idea of savings, here are typical annual bill reductions many South Lake homeowners see when they upgrade:
• Old electric to heat pump hot water system: $400–$800 per year • Gas to heat pump hot water system: $300–$600 per year • Gas to solar hot water system: $250–$550 per year • Old electric to modern electric hot water installation with solar diversion: $200–$450 per year
Across the 6164 postcode there have already been 4,253 efficient hot water installations, combining heat pump hot water installation and solar hot water installation. Installations climbed strongly through the mid‑2000s, peaking around 2005–2007, then settling into steady numbers of around 100–200 systems a year from 2010 onwards. Even in recent years, with 2023 and 2024 both recording 86 systems and 2025 already adding more, this trend shows ongoing interest in electrification, lower running costs and the most efficient hot water system choices for South Lake homes.
When it comes to hot water WA incentives, many South Lake households can tap into a mix of Federal and State support. Small‑scale Technology Certificates (STCs) effectively act as an upfront solar hot water rebate or heat pump hot water rebate, cutting the solar hot water price / cost or heat pump hot water price / cost by a substantial percentage. WA schemes and retailer offers can add an extra electric hot water system rebate or discount, especially when replacing gas. With the right combination of incentives, the solar hot water price / cost or the installed cost of a high‑efficiency heat pump can drop enough to shorten payback to just a few years, particularly if you also use timers or solar diversion to maximise self‑consumption. For many households weighing solar hot water vs electric hot water, or electric hot water vs gas hot water, the numbers increasingly favour an energy efficient hot water system that runs mostly on sunshine.
If your current unit is ageing, unreliable, or you are facing a solar hot water tank replacement or hot water repair, it is a good time to compare options. Whether you are interested in a chromagen solar hot water upgrade, a rheem solar hot water repair, a new electric hot water installation, or shifting to one of the best heat pump hot water system brands on the market, local specialists can walk you through hot water system price / cost, hot water rebate wa options and running‑cost estimates.
South Lake is quietly becoming more sustainable, with strong solar uptake and growing awareness of efficient hot water. If you are ready to replace old gas or electric with a modern hot water system, talk with experienced hot water WA installers who understand local conditions. They can help you compare heat pump vs solar hot water, explain hot water rebate wa incentives, and recommend the best hot water system Australia has to offer for your home. Connect with trusted local experts for personalised advice, lower bills, fewer emissions and a future‑proof hot water upgrade that suits the way you live in South Lake.