Hot Water Systems in Yerriyong
The 2540 postcode, covering Yerriyong, Nowra Naval Po, Wreck Bay, Bamarang, Barringella, Basin View, Beecroft Peninsula, Berrara, Bewong, Bolong, Boolijah, Bream Beach, Browns Mountain, Brundee, Buangla, Burrier, Callala Bay, Callala Beach, Cambewarra, Cambewarra Village, Comberton, Comerong Island, Cudmirrah, Culburra Beach, Currarong, Erowal Bay, Ettrema, Falls Creek, Greenwell Point, Hmas Albatross, Hmas Creswell, Huskisson, Hyams Beach, Illaroo, Jerrawangala, Jervis Bay, Kinghorne, Longreach, Mayfield, Meroo Meadow, Mondayong, Moollattoo, Mundamia, Myola, Nowra Hill, Numbaa, Old Erowal Bay, Orient Point, Parma, Pyree, Sanctuary Point, St Georges Basin, Sussex Inlet, Swanhaven, Tallowal, Tapitallee, Terara, Tomerong, Tullarwalla, Twelve Mile Peg, Vincentia, Wandandian, Watersleigh, Wollumboola, Woollamia, Worrigee, Worrowing Heights, Wrights Beach and Yalwal and surrounding areas, is home to around 26,054 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 Yerriyong and the 2540 area, 4,586 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 Yerriyong's climate delivering an average of 4.4 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 2540
4th
State Wide
24th
Australia Wide
Hot Water Installation Yerriyong
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 Yerriyong
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterYerriyong
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 Yerriyong
Compare heat pump hot water systems suitable for Yerriyong'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 - Yerriyong, 2540
Hot Water Demographics - Yerriyong
Based on the Australian Bureau of Statistics 2021 Census (ABS), Yerriyong has around 26,054 private dwellings, home to approximately 43,985 people. With an average household size of 2.3 people, and around 50 litres of hot water used per person each day in Australia, Yerriyong households use approximately 115 litres of hot water daily, equating to a massive 3.0 million litres of hot water used across the suburb every single day.
Other census insights reinforce Yerriyong's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Yerriyong community is home to 2,934 couple families with children and 967 one-parent families, meaning a large proportion of households face substantial hot water demand. With 5,226 homes owned with a mortgage and 8,495 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.
Yerriyong is converting hot water demand to efficient systems faster than many peers, with 17.6% of dwellings already upgraded.
Hot water systems in Yerriyong
Across Yerriyong and the wider 2540 area, more households are quietly upgrading to an energy efficient hot water system to get off old gas and power-hungry units. With an average household size of around 2.3 people and more than 18,000 occupied dwellings in the postcode, reliable, affordable hot water is a big part of everyday life. Many homes were built with basic gas or electric hot water, but with power prices rising and a strong local focus on sustainability, shifting to a modern heat pump hot water system, solar hot water system or efficient electric hot water system is becoming the logical next step.
Yerriyong enjoys solid sunshine, with Nowra’s mean daily solar exposure sitting at about 15.7 MJ/m² – roughly 4.4 kWh/m² per day. That makes a solar hot water heating system or heat pump hot water installation a strong option, especially for owner-occupiers (over 13,700 households across the postcode own their home outright or with a mortgage). For many families and retirees on fixed incomes, the annual hot water energy savings from upgrading can make a real difference to weekly budgets, while cutting emissions at the same time.
In practical terms, most Yerriyong homes will be looking at a 250–315L hot water installation for smaller households, and 315–400L systems for larger families. Hot water can account for 20–30% of household energy use, so choosing the most efficient hot water system you can afford matters. Local trends show strong uptake of efficient hot water systems: there have already been 4,586 heat pump and solar hot water installations recorded in the 2540 postcode. Brands like Rheem heat pump hot water and Rheem solar hot water are common choices, along with premium options such as Sanden heat pump units and Rinnai solar hot water or Chromagen solar hot water for those chasing the most efficient hot water system possible.
Typical annual bill savings in Yerriyong look like: • Old electric hot water system to heat pump hot water system: $400–$800 per year • Gas hot water to heat pump hot water: $300–$700 per year • Gas hot water to solar hot water system: $250–$600 per year • Old electric to modern electric hot water installation paired with rooftop solar: $200–$500 per year
These savings depend on your tariff, usage and whether you use timers or solar diversion, but they give a realistic feel for the payback time when you compare heat pump vs solar hot water or solar hot water vs electric hot water. Many locals weigh up heat pump hot water price / cost against solar hot water price / cost and decide based on roof space, shade and when they use most of their hot water.
Looking at recent installs in Yerriyong’s postcode, you can see how interest has grown and then stabilised. From just 28 efficient systems in 2001, installations surged to 1,176 in 2009 and 630 in 2010 as rebates and early solar incentives kicked in. Since then, numbers have stayed steady, with 148 installs in 2018, 84 in 2019 and around 50–80 systems most years through to 2024. Even in 2025 there are already 17 new systems on the books. This long-term trend shows a clear local move towards electrification, lower running costs and more energy efficient hot water system choices.
Hot Water Rebates, Tariffs & Savings
For hot water NSW households, there is strong interest in replacing old gas or electric units with efficient options such as heat pumps, modern electric hot water or a solar hot water installation. Australian Government Small-scale Technology Certificates (STCs) apply to eligible systems, reducing the upfront hot water system price / cost at the point of sale. On top of that, state programs can offer a heat pump hot water rebate, solar hot water rebate or even an electric hot water system rebate in some schemes, further trimming the heat pump hot water price / cost or solar hot water price / cost. In real terms, these hot water rebate NSW incentives can knock a substantial percentage off the installed price, and when you combine them with rooftop solar and smart timers, many Yerriyong homes see payback periods shrink to just a few years while saving hundreds of dollars per year.
If your existing gas or electric unit is getting old, noisy or unreliable, it is a good time to check whether your Yerriyong home is ready for a hot water upgrade. Whether you are comparing heat pump vs solar hot water, looking at the best heat pump hot water system, asking which is the best hot water system Australia wide, or simply weighing electric hot water vs gas hot water, experienced local installers can help you choose. From solar hot water tank replacement and solar hot water repair through to hot water repair on older units and full electric hot water installation, working with trusted specialists ensures your new energy efficient hot water system is sized correctly, eligible for rebates and set up to make the most of your solar. With Yerriyong’s strong solar resource and growing interest in sustainability, now is a smart time to talk to local experts for personalised advice with us and future-proof your home’s hot water.