Hot Water Systems in Mulgrave
The 3170 postcode, covering Mulgrave and Waverley Gardens and surrounding areas, is home to around 7,228 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 Mulgrave and the 3170 area, 574 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 Mulgrave's climate delivering an average of 4.1 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 3170
139th
State Wide
511st
Australia Wide
Hot Water Installation Mulgrave
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 Mulgrave
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterMulgrave
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.
Want Solar Finance Options?
Compare lenders and get tailored loan offers.
Heat Pump Hot Water Systems for Mulgrave
Compare heat pump hot water systems suitable for Mulgrave'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 - Mulgrave, 3170
Hot Water Demographics - Mulgrave
Based on the Australian Bureau of Statistics 2021 Census (ABS), Mulgrave has around 7,228 private dwellings, home to approximately 19,073 people. With an average household size of 2.8 people, and around 50 litres of hot water used per person each day in Australia, Mulgrave households use approximately 140 litres of hot water daily, equating to a massive 1.0 million litres of hot water used across the suburb every single day.
Other census insights reinforce Mulgrave's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Mulgrave community is home to 1,775 couple families with children and 292 one-parent families, meaning a large proportion of households face substantial hot water demand. With 2,521 homes owned with a mortgage and 2,604 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.
Mulgrave is converting hot water demand to efficient systems faster than many peers, with 7.9% of dwellings already upgraded.
Hot water systems in Mulgrave
Across Mulgrave, more households are upgrading to an energy efficient hot water system – whether that’s a heat pump hot water system, a solar hot water system or a modern electric hot water system that works with rooftop solar. With an average household size of around 2.8 people and more than 5,600 families in the 3170 postcode, reliable hot water is non‑negotiable, but power prices keep climbing. For many locals, moving away from older gas or ageing electric hot water towards efficient hot water technology is the obvious next step.
Mulgrave’s strong solar exposure helps. The local weather station at Springvale Necropolis records mean daily solar exposure of about 14.9 MJ/m², which is roughly 4.1 kWh/m² per day across the year. That level of sunshine supports both a solar hot water heating system on the roof and a high‑performance heat pump hot water system drawing warmth from the air. With around 7,228 dwellings and a high proportion of separate houses, there’s plenty of roof space and yard room for a well‑sized solar hot water installation or heat pump hot water installation that can slash running costs compared with old gas hot water.
In Mulgrave 3170, most homes are three or four bedrooms, and many are owned outright or with a mortgage, so long showers, kids’ baths and regular laundry loads all add up. Hot water can easily be a quarter of a typical power bill, which is why the most efficient hot water system you can reasonably install makes such a difference. Popular choices locally include Rheem solar hot water and Rheem heat pump hot water units, Rinnai solar hot water systems and Japanese‑engineered Sanden heat pump models, all known as contenders for the best heat pump hot water system or best hot water system Australia wide.
When you look at hot water system price or cost, it helps to factor in realistic savings. As a guide, Mulgrave households commonly see bill reductions such as:
• Old electric to heat pump: around $350–$700 per year • Gas to heat pump: around $250–$600 per year • Gas to solar hot water: around $200–$550 per year • Old electric to modern electric with solar: around $200–$500 per year
Since 2004, there have been 574 efficient hot water installations recorded in the 3170 postcode, covering both heat pump and solar hot water systems. Installations really picked up around 2007–2011, with peak years like 2011 seeing 77 new systems, and there has been steady interest again from 2018 through to 2024. This trend mirrors Mulgrave’s wider shift towards electrification, lower running costs and cleaner energy, as more residents compare heat pump vs solar hot water and even solar hot water vs electric hot water backed by rooftop PV.
Hot Water Rebates, Tariffs & Savings
For Mulgrave homeowners thinking about replacing an old gas or electric hot water unit, there has never been a better time to consider an energy efficient hot water system. Federal incentives such as Small‑scale Technology Certificates (STCs) can apply to eligible solar hot water systems and heat pump units, effectively cutting the solar hot water price or cost and the heat pump hot water price or cost by a sizeable amount. On top of that, Victorian hot water rebate programmes can offer a dedicated heat pump hot water rebate, solar hot water rebate or even an electric hot water system rebate in some schemes, helping to bring down the upfront cost of electric hot water installation when moving away from gas.
In practice, these hot water rebate VIC options can reduce the installed cost by thousands, trimming payback periods to just a few years, especially if you run your system on a solar tariff, timer or solar‑diverter. Many Mulgrave homes with rooftop PV are now using their excess daytime generation to power a heat pump or efficient electric hot water system, creating one of the most efficient hot water system setups available and making hot water repair and running costs far more predictable. Where needed, solar hot water repair and solar hot water tank replacement can also be combined with upgrades to more modern brands like Chromagen solar hot water, Rheem or Rinnai.
If you live in Mulgrave and your current unit is more than 10 years old, noisy, rusty or running on gas, it is worth checking whether a hot water upgrade could work for you. Comparing electric hot water vs gas hot water, or heat pump vs solar hot water, with an experienced local installer helps you find the right balance of upfront cost, rebates, and long‑term savings. With strong solar resources, solid household incomes and growing interest in sustainability, hot water VIC upgrades in Mulgrave are a smart way to cut bills, reduce emissions and future‑proof your home. To explore options from Sanden heat pump systems to Rheem solar hot water and more, connect with trusted local hot water specialists for personalised advice and a tailored hot water installation or hot water repair plan that suits your property and budget.