Hot Water Systems in St Lawrence
The 4707 postcode, covering St Lawrence, The Percy Group and Collaroy and surrounding areas, is home to around 172 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 St Lawrence and the 4707 area, 21 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 St Lawrence's climate delivering an average of 5.7 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 4707
350th
State Wide
2093rd
Australia Wide
Hot Water Installation St Lawrence
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 St Lawrence
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterSt Lawrence
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 St Lawrence
Compare heat pump hot water systems suitable for St Lawrence'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 - St Lawrence, 4707
Hot Water Demographics - St Lawrence
Based on the Australian Bureau of Statistics 2021 Census (ABS), St Lawrence has around 172 private dwellings, home to approximately 208 people. With an average household size of 2 people, and around 50 litres of hot water used per person each day in Australia, St Lawrence households use approximately 100 litres of hot water daily, equating to a massive 0.0 million litres of hot water used across the suburb every single day.
Other census insights reinforce St Lawrence's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The St Lawrence community is home to 15 couple families with children and 4 one-parent families, meaning a large proportion of households face substantial hot water demand. With 26 homes owned with a mortgage and 54 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.
St Lawrence is converting hot water demand to efficient systems faster than many peers, with 12.2% of dwellings already upgraded.
Hot water systems in St Lawrence
In St Lawrence, more locals are rethinking their old gas and electric hot water system and switching to energy‑efficient options like a heat pump hot water system, solar hot water system and modern electric hot water system. With most homes here being separate houses and an average household size of around two people, hot water demand is steady but energy costs still bite, especially for families on a median household income under $1,000 a week. Upgrading to an energy efficient hot water system is a simple way to trim bills without changing how you live.
St Lawrence is blessed with serious sunshine. The local weather station records mean daily solar exposure of about 20.4 MJ/m², which works out to roughly 5.7 kWh of solar energy per square metre per day over the year. That strong solar resource makes both a solar hot water heating system and a quality heat pump hot water system perform really well, particularly when paired with rooftop solar. For many long‑term residents and retirees (the median age here is 52, with a good share of over‑65s), lower running costs and fewer surprises on the power bill are just as important as reliability.
Across the 4707 postcode there are 111 occupied private dwellings and 172 dwellings in total, so every hot water installation decision adds up. Many homes still rely on older gas or resistive electric units, which are some of the least efficient options. Switching to a modern system can cut hot water energy use by more than half, and in some cases by up to 70%, delivering strong Annual Hot Water Energy Savings for St Lawrence households.
For a typical St Lawrence home, the most common sizes are 250–315 litre tanks for families and 135–160 litres for couples or singles. Hot water energy use can be one of the biggest single loads in the house, especially if you are still on an old storage electric hot water system. Brands like Rheem, Rinnai, Sanden and Thermann are popular choices locally, offering everything from rheem solar hot water and rheem heat pump hot water through to rinnai solar hot water and premium sanden heat pump units. These are often shortlisted when people search for the best hot water system Australia wide or the best heat pump hot water system for our climate.
When you look at heat pump vs solar hot water, both can be the most efficient hot water system for different homes. A heat pump hot water installation suits shaded roofs or smaller properties, while a solar hot water installation with roof collectors is ideal if you have clear northern sun. Either way, pairing a hot water system with solar PV or timers can turn it into a truly energy efficient hot water system and improve the overall hot water system price / cost over its life. Even a modern electric hot water installation controlled to run during solar hours can be a smart step up from old electric hot water vs gas hot water.
In St Lawrence there have already been 21 efficient hot water systems installed, combining heat pump and solar hot water installations. Installations peaked around 2009 with 10 systems in a single year, followed by steady interest in 2011 and 2012, and more recent installs in 2017, 2019 and 2022. This pattern shows how local homeowners are gradually embracing electrification, lower running costs and cleaner hot water QLD wide, especially as energy prices rise.
Average annual bill savings will vary, but typical ranges for St Lawrence homes are:
• Old electric to heat pump hot water system: $350–$700 per year • Gas to heat pump hot water system: $250–$550 per year • Gas to solar hot water system: $250–$600 per year • Old electric to modern electric hot water system with solar: $200–$450 per year
These savings help offset the heat pump hot water price / cost or solar hot water price / cost over time. When your existing solar hot water tank replacement is due, it can be the perfect moment to reassess which option is right for you. Local installers can also help with hot water repair, solar hot water repair and ongoing servicing to keep your system running efficiently.
Hot Water Rebates, Tariffs & Savings
Across QLD, including St Lawrence, there is growing interest in replacing old gas or electric units with efficient options like a heat pump hot water system, newer electric hot water system or a solar hot water system. Federal incentives such as Small‑scale Technology Certificates (STCs) apply to eligible solar hot water and heat pump units, effectively acting as an upfront solar hot water rebate or heat pump hot water rebate. QLD‑specific programmes and occasional electric hot water system rebate offers can further cut the initial outlay.
Depending on the system, these discounts can reduce the installed hot water system price / cost by a substantial percentage, and when you add in annual bill savings of a few hundred dollars, the payback period can shrink to just a handful of years. Smart controls, off‑peak tariffs, timers and solar‑diversion units can boost savings even more by ensuring your hot water system runs when energy is cheapest or when your solar is exporting. For many homes weighing up solar hot water vs electric hot water or electric hot water vs gas hot water, the combination of rebates and lower running costs is what tips the balance. A good installer will also explain any current hot water rebate qld options and tariffs that suit your usage.
If you live in St Lawrence and your hot water is getting noisy, rusty or just expensive to run, it is a great time to check whether your place is ready for a hot water upgrade. Whether you are moving from gas to an all‑electric home with a heat pump, upgrading to a solar hot water system, or planning an electric hot water installation that works with your solar, experienced local hot water installers can help you choose the right setup. With strong sun, a community already interested in sustainability and solid potential for lower bills, efficient hot water systems are a smart way to cut emissions and future‑proof your home. Connect with trusted local experts for personalised advice, hot water installation and hot water repair support tailored to St Lawrence.