Hot Water Systems in Merton
The 3715 postcode, covering Merton, Ancona and Woodfield and surrounding areas, is home to around 273 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 Merton and the 3715 area, 25 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 Merton's climate delivering an average of 4.6 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 3715
529th
State Wide
2027th
Australia Wide
Hot Water Installation Merton
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 Merton
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterMerton
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 Merton
Compare heat pump hot water systems suitable for Merton'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 - Merton, 3715
Hot Water Demographics - Merton
Based on the Australian Bureau of Statistics 2021 Census (ABS), Merton has around 273 private dwellings, home to approximately 331 people. With an average household size of 2.3 people, and around 50 litres of hot water used per person each day in Australia, Merton households use approximately 115 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 Merton's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Merton community is home to 22 couple families with children and 4 one-parent families, meaning a large proportion of households face substantial hot water demand. With 53 homes owned with a mortgage and 75 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.
Merton is converting hot water demand to efficient systems faster than many peers, with 9.2% of dwellings already upgraded.
Hot water systems in Merton
Across Merton, more locals are swapping old gas and ageing electric units for an energy efficient hot water system that keeps bills down and showers hot. With most homes here being separate houses and an average household size of around 2.3 people, a well-sized hot water system is a simple way to trim running costs without sacrificing comfort.
Merton’s climate is ideal for efficient hot water. The town enjoys an average annual solar exposure of about 16.6 MJ/m² per day, which is roughly 4.6 kWh/m²/day. That level of sunshine supports both a modern solar hot water system and a quality heat pump hot water system, especially when paired with rooftop solar. With many households owned outright or with a mortgage and a median household income of about $1,187 a week, upgrading from older gas or electric hot water to a more efficient hot water system is a logical next step for long term savings. Over the life of the unit, Annual Hot Water Energy Savings can easily reach hundreds of dollars a year compared with older systems.
In a postcode of only 148 occupied dwellings, hot water demand is steady but not extreme, making right-sizing important. Families and couples typically find a 250–315L heat pump hot water installation or solar hot water installation is plenty, while smaller households can often go smaller again. A modern electric hot water system still has a place, especially when teamed with rooftop solar and smart timers, but many Merton homeowners are now weighing up heat pump vs solar hot water to find the most efficient hot water system for their property.
You’ll see familiar brands around Merton, including Rheem heat pump hot water and Rheem solar hot water options, along with Sanden heat pump systems and Rinnai solar hot water units. These are all strong contenders when you are comparing the best hot water system Australia has to offer, and many locals now ask specifically for the best heat pump hot water system to match their solar. For those sticking with an electric hot water system, choosing an energy efficient hot water system and using excess solar can still deliver solid savings.
Recent data shows around 25 efficient hot water systems have already been installed in the 3715 postcode, combining both heat pump and solar hot water heating system upgrades. Installations peaked around 2009, with another lift in 2015–2016 and new systems still going in as recently as 2025. This steady trickle of hot water installation work reflects growing interest in electrification, lower running costs and reliable hot water VIC wide, especially among Merton’s many over-50s planning for lower, more predictable bills.
Typical savings for Merton homes switching to efficient hot water include:
• Old electric to heat pump hot water system: save roughly $350–$700 per year on bills. • Gas to heat pump hot water: save around $250–$600 per year. • Gas to solar hot water system: save about $300–$650 per year. • Old electric to modern electric hot water system with solar: save roughly $200–$500 per year.
For many properties, the hot water system price or cost is eased by incentives. Federal Small-scale Technology Certificates (STCs) apply to eligible heat pump and solar hot water systems, effectively cutting the upfront heat pump hot water price or cost or solar hot water price or cost at the point of sale. On top of that, Victorian hot water rebate programs can offer a heat pump hot water rebate, solar hot water rebate or even an electric hot water system rebate when you are replacing inefficient units. Together, these hot water rebate VIC schemes can reduce the system cost by a substantial percentage and shorten payback times, especially when you use timers or solar diversion to run your electric hot water vs gas hot water at the cheapest times.
If your current unit is leaking, unreliable or just old, it is worth comparing solar hot water vs electric hot water, as well as electric hot water vs gas hot water, before you rush into a like-for-like replacement. A well planned hot water installation can future proof your home, and local installers can also help with hot water repair, solar hot water repair and solar hot water tank replacement when a full changeover is not yet needed.
If you live in Merton and your hot water system is ageing, now is a smart time to see if your home is ready for a heat pump hot water installation, solar hot water installation or efficient electric hot water installation. With strong solar exposure, growing interest in sustainability and generous hot water rebate VIC programs, working with experienced hot water installers like us can help you reduce bills, cut emissions and lock in reliable, energy efficient hot water for years to come. Reach out to trusted local experts for personalised advice on the right hot water systems Merton homes need today.