Hot Water Systems in Mundamia
The 2540 postcode, covering Mundamia, 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, 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, Yalwal and Yerriyong 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 Mundamia 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 Mundamia's climate delivering an average of 4.3 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 2540
4th
State Wide
24th
Australia Wide
Hot Water Installation Mundamia
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 Mundamia
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterMundamia
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 Mundamia
Compare heat pump hot water systems suitable for Mundamia'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 - Mundamia, 2540
Hot Water Demographics - Mundamia
Based on the Australian Bureau of Statistics 2021 Census (ABS), Mundamia 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, Mundamia 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 Mundamia's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Mundamia 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.
Mundamia is converting hot water demand to efficient systems faster than many peers, with 17.6% of dwellings already upgraded.
Hot water systems in Mundamia
Across Mundamia and the wider 2540 area, more households are swapping old gas and power‑hungry units for an energy efficient hot water system. With average household sizes around 2.3 people and a big share of separate houses (over 16,000 dwellings), hot water demand is steady all year. Power prices keep climbing, so upgrading to a modern heat pump hot water system, solar hot water system or efficient electric hot water system is becoming the logical next step for many owner‑occupiers and long‑term renters.
Mundamia is well placed for efficient hot water. The Nowra Boat Shed weather station records mean daily solar exposure of about 15.5 MJ/m², which is roughly 4.3 kWh of solar energy per square metre per day over the year. That strong sunlight helps both a solar hot water heating system and a quality heat pump perform well, cutting the energy needed to keep your showers hot. With more than 13,000 locals over 65 in the postcode and a median age of 49, reliability and lower running costs matter just as much as sustainability.
Around 2540, efficient hot water systems are already making a dent in energy use, with 4,586 heat pump and solar hot water installations recorded. Many of these homes also have rooftop solar, so switching from electric hot water vs gas hot water to an all‑electric, solar‑friendly setup is a natural move. For a typical Mundamia family, hot water can be one of the biggest single energy loads, so moving to the most efficient hot water system you can afford has a direct impact on quarterly bills.
In practical terms, locals are weighing up heat pump vs solar hot water and even modern electric units that pair well with solar. Brands like Rheem heat pump hot water and Rheem solar hot water are popular for proven reliability, while Sanden heat pump models are known as some of the best heat pump hot water system options in Australia. Rinnai solar hot water and Chromagen solar hot water are also common where roof space and aspect suit a full solar hot water installation.
Typical annual bill savings in Mundamia look like this:
• Upgrading old electric to a heat pump hot water system: about $350–$700 per year. • Switching gas to a heat pump: about $250–$600 per year. • Switching gas to a solar hot water system: about $200–$550 per year. • Replacing an old electric with a modern electric hot water system timed to run on solar: about $150–$400 per year.
These savings depend on the hot water system price, household size and how much hot water you use, but they give a fair guide when comparing heat pump hot water price / cost, solar hot water price / cost and standard electric options.
Recent installs in Mundamia and the surrounding 2540 postcode show how interest has grown over time. From just 28 efficient hot water installations in 2001, numbers jumped sharply around 2008–2010, peaking at 1,176 installs in 2009 as rebates and early solar incentives took off. While annual installations have eased back to dozens per year (52 systems in 2024 and 17 already in 2025), the long‑term trend shows steady uptake as more residents look to electrification, lower running costs and cleaner hot water NSW wide.
Hot Water Rebates, Tariffs & Savings
For Mundamia homeowners, the appeal of replacing old gas or electric hot water with a heat pump hot water system, a newer electric hot water system or a solar hot water system keeps growing. Federal incentives like Small‑scale Technology Certificates (STCs) apply to eligible heat pump and solar hot water systems, effectively acting as an upfront discount. On top of that, NSW hot water rebate programs for efficient systems can further reduce the hot water system price / cost, especially for households moving away from gas.
In practice, a solar hot water rebate or heat pump hot water rebate can trim the installed cost by a substantial percentage, often bringing payback periods down to just a few years when combined with rooftop solar. Add smart controls, timers or solar diversion and your energy efficient hot water system can soak up excess solar during the day, improving savings even more. There are also electric hot water system rebate offers in some programs that support the shift from gas to efficient electric, making solar hot water vs electric hot water and electric hot water vs gas hot water comparisons tilt strongly towards efficient, all‑electric homes.
If your current unit is older, noisy or you are facing a solar hot water tank replacement or hot water repair, it is a good time to compare options. The best hot water system Australia‑wide for you might be a compact heat pump, a roof‑mounted solar hot water heating system, or a straightforward electric hot water installation that works with your existing switchboard.
Whether you need fast hot water repair, a new heat pump hot water installation, solar hot water repair or a full solar hot water installation, it pays to get local advice. To find the best heat pump hot water system or solar setup for your home, budget and tariff, talk to experienced Mundamia installers who work with proven brands and know the local conditions.
Thinking about a hot water upgrade in Mundamia? If you are on ageing gas or an old electric unit, now is a smart time to explore an energy efficient hot water system that suits your home. Work with experienced hot water NSW specialists like us to compare options, tap into any hot water rebate NSW programs, and design a solution that cuts bills, reduces emissions and future‑proofs your place—then connect with our trusted local experts for personalised advice.