Hot Water Systems in Lewisham
The 7173 postcode, covering Lewisham, Carlton, Carlton River, Connellys Marsh, Dodges Ferry, Forcett and Primrose Sands and surrounding areas, is home to around 3,864 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 Lewisham and the 7173 area, 101 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 Lewisham's climate delivering an average of 3.8 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 7173
28th
State Wide
1415th
Australia Wide
Hot Water Installation Lewisham
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 Lewisham
* Data from the Bureau of Meteorology. Closest station: N/A.
Solar Powered Hot WaterLewisham
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 Lewisham
Compare heat pump hot water systems suitable for Lewisham'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 - Lewisham, 7173
Hot Water Demographics - Lewisham
Based on the Australian Bureau of Statistics 2021 Census (ABS), Lewisham has around 3,864 private dwellings, home to approximately 6,813 people. With an average household size of 2.4 people, and around 50 litres of hot water used per person each day in Australia, Lewisham households use approximately 120 litres of hot water daily, equating to a massive 0.5 million litres of hot water used across the suburb every single day.
Other census insights reinforce Lewisham's suitability for energy-saving improvements like energy-efficient or solar-powered hot water. The Lewisham community is home to 500 couple families with children and 194 one-parent families, meaning a large proportion of households face substantial hot water demand. With 1,342 homes owned with a mortgage and 1,069 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.
Lewisham is converting hot water demand to efficient systems faster than many peers, with 2.6% of dwellings already upgraded.
Hot water systems in Lewisham
Across Lewisham and the 7173 area, more households are rethinking their old gas and electric hot water system and moving 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 2.4 people, hot showers, dishwashers and laundries add up quickly on the power bill. For many families and retirees on fixed incomes, upgrading to a more efficient hot water system is becoming the logical next step.
Lewisham’s sunny coastal climate helps. The local weather station at Forcett records an average annual solar exposure of about 13.8 MJ/m² per day, which translates to roughly 3.8 kWh/m² of usable solar energy daily over the year. That is strong support for a solar hot water heating system or a high‑efficiency heat pump hot water installation, especially when paired with rooftop solar. With around 2,921 occupied private dwellings and a high rate of home ownership (over 2,400 households either owning outright or with a mortgage), there is a big opportunity for residents to lock in long‑term energy savings by replacing ageing cylinders and gas units.
In 7173 there have been 101 efficient hot water installations recorded, combining heat pump and solar hot water installation jobs. Install numbers started to lift around 2009, peaking in 2011, and there has been a steady trickle of systems going in since. That tells you more Lewisham households are interested in electrification, lower running costs and cutting emissions. Many are comparing heat pump vs solar hot water, weighing up a compact sanden heat pump or rheem heat pump hot water unit against a roof‑mounted rheem solar hot water or chromagen solar hot water system. Others prefer a simple, well‑insulated electric hot water installation, especially if they already have rooftop solar and want to run the tank during the middle of the day.
For a typical Lewisham home, hot water can be one of the biggest single loads on the meter. Swapping to an energy efficient hot water system can make a real dent in usage. As a guide, annual bill savings might look like:
• Old electric hot water system to heat pump hot water system: around $350–$700 per year. • Gas storage to heat pump hot water: roughly $300–$600 per year. • Gas storage to solar hot water system: about $250–$550 per year. • Old electric to modern electric hot water system run on solar: around $200–$450 per year.
Brands like Rheem and Rinnai are popular for both solar and electric units, while Sanden is often chosen for premium heat pump hot water price / cost versus performance, and Chromagen has strong options in the solar hot water vs electric hot water decision. When you are comparing the best hot water system Australia can offer for your place, it is worth looking at the most efficient hot water system for your roof space, household size and budget, not just the sticker price.
Hot Water Rebates, Tariffs & Savings
Right across Lewisham TAS, there is growing interest in moving away from gas hot water to all‑electric homes using a heat pump hot water system, solar hot water heating system or super‑efficient electric hot water system. Several hot water rebate TAS programs can help with the upfront hot water system price / cost. At a federal level, Small‑scale Technology Certificates (STCs) effectively provide a discount on eligible systems like rheem solar hot water, rinnai solar hot water and many heat pump units, reducing the solar hot water price / cost and heat pump hot water price / cost at the point of sale. On top of that, state‑based schemes and occasional electric hot water system rebate offers can bring the cost down further.
For Lewisham homeowners on typical incomes (median household income is around $1,383 per week), these incentives can trim the installed solar hot water price / cost or heat pump hot water installation bill by a substantial percentage, sometimes cutting payback periods down to only a few years. Combine rebates with smart tariffs, timers or solar‑diversion controls, and an energy efficient hot water system can save hundreds of dollars a year while improving comfort. If something goes wrong, local hot water repair and solar hot water repair specialists can usually service major brands and handle solar hot water tank replacement as needed, keeping your system running efficiently.
If you live in Lewisham and your current unit is old, noisy or costing a fortune, it is a good time to check whether your home is ready for a hot water upgrade. Whether you are weighing up heat pump vs solar hot water, comparing solar hot water vs electric hot water, or just want the best heat pump hot water system for your budget, experienced hot water TAS installers can help. With Lewisham’s strong solar exposure and growing focus on sustainability, an efficient hot water system can cut bills, reduce emissions and future‑proof your home. Connect with trusted local experts for personalised advice on hot water installation and hot water repair, and find the right solution for your place.