What Is the Price of Hot Water Systems?

Navigating the price range of hot water systems can feel like a puzzle, but understanding the key factors behind those costs can help you piece it together. From the type of system you choose to its size, brand, installation complexity, and energy efficiency, each aspect plays a role in determining the final price.

Whether you’re drawn to the affordability of electric systems, the long-term savings of solar, or the efficiency of heat pumps, each option comes with its own cost considerations. And while reputable brands might have higher price tags, they often offer superior warranties and quality.

Don’t forget, installation costs can vary too. Replacing an existing system is typically more budget-friendly than a brand-new installation. And when it comes to energy efficiency, investing in a high-efficiency system might mean a higher upfront cost, but it can lead to significant savings on running costs down the line.

Balancing your budget, household needs, and energy efficiency goals is the key to finding your perfect hot water system. Explore each factor in detail, and you’ll be well-equipped to make the most cost-effective decision for your home.

This table shows estimated running costs based on a one-year period using an average of 150 litres per day, which is the current average for a 4-person home and the target for the ‘Love Water‘ promotion by the Central Coast Council.

The indicative installed cost is the all-in figure: unit supply, fittings, valves, removal of the old system, tempering valve (required by NSW regulations on any new install), compliance certificate, and labour. Your actual quote depends on capacity, brand, location of the unit, condition of existing pipework, and whether any electrical, gas, or framing work is required.

The running costs of hot water systems are a crucial factor to consider, as they can vary significantly based on the type of system and brand. The figures below come from Rheem’s running cost calculator, using current Australian tariff averages, to give a clearer picture of long-term cost differences between system types.

The standout figure is the heat pump at under $500 per year, compared with over $1,500 for a traditional electric storage unit on the same tariff. Over a 10-year system life, that’s a $10,000+ difference in running cost alone, which is why heat pumps continue to take market share even with a higher upfront price tag.

• Lowest upfront cost: Cheapest system type to buy and install.
• Easy installation: Can be fitted in most locations without complex requirements.
• Reliable: Mature, proven technology with widely available replacement parts.

• Highest running costs: Electricity is more expensive per unit of heat than gas or solar.
• Slower recovery: Takes longer to reheat than gas storage.
• Environmental impact: Higher carbon emissions unless paired with rooftop solar or off-peak metering.

$1,400 – $2,800 fully installed for a standard 160-315L electric storage unit, including removal of the old system, tempering valve, and compliance certificate. Off-peak metered installs (Tariff 31 or 33) sit at the lower end of the range and significantly reduce running costs. If you’re considering an electric storage unit, it’s worth understanding how off-peak hot water works and whether your home is eligible.

Ideal for households without gas supply, off-peak tariff customers, and those wanting the lowest upfront cost for a like-for-like replacement.

• Endless hot water: Heats water on demand, so there’s no tank to run dry.
• No standby heat loss: Only fires when hot water is being used, which keeps running costs down.
• Long lifespan: Typically 15 to 20 years versus 8 to 12 years for a storage tank.
• Space saving: Wall-mounted unit, no large tank required.

• Higher upfront cost than gas storage.
• Flow rate matters: Multiple simultaneous hot water outlets need a properly sized unit (typically 20-26L/min for family homes).

$1,900 – $3,800 fully installed for a 16-26L/min unit, including removal of the old system, tempering valve, and compliance certificate. For a deeper dive on how the technology works, see our explainer on how continuous flow hot water systems work.

Ideal for households on mains gas wanting unlimited hot water, lower standby losses, and the longer service life that comes with no tank to corrode.

• Environmentally friendly: Uses renewable solar energy, reducing carbon footprint.
• Lowest running costs: Significant savings on energy bills once installed.
• STC discount: Eligible systems attract a federal Small-scale Technology Certificate discount at point of sale.

• Highest upfront cost.
• Weather dependent: Efficiency drops in cloudy or rainy conditions, so a gas or electric booster is required.
• Roof requirements: Needs a north-facing roof with good year-round sun exposure.

$4,000 – $7,500 fully installed for a residential solar hot water system with gas or electric boost, after the federal STC discount has been applied at point of sale.

Ideal for households with a north-facing roof, larger upfront budget, longer-term outlook on running cost savings, and a preference for renewable hot water generation.

• Most energy-efficient electric option: Uses around a quarter of the electricity of a traditional electric storage unit.
• Reduced running costs: Often the lowest running cost on the market after solar.
• Eligible for NSW rebates: Point-of-sale discounts through the NSW Energy Savings Scheme typically save $1,000 to $2,000.
• Year-round operation: Works efficiently in the Central Coast’s mild climate.

• Higher upfront cost than electric storage.
• Clearance required: Needs space around the unit for airflow.
• Compressor noise: Slightly louder than a storage tank in operation.

$3,800 – $6,500 fully installed before the NSW Energy Savings Scheme rebate is applied. With the rebate factored in, most Central Coast households pay between $1,800 and $4,500 out of pocket for a quality heat pump replacement.

Suitable for households replacing an old electric storage unit, properties without mains gas, and anyone prioritising lowest-possible running costs over upfront price.

Regular maintenance is essential to ensure the longevity and efficiency of hot water systems. Maintenance costs vary depending on the type of system and the specific services required. Here’s an overview:

Electric Hot Water Systems

• Typical maintenance: Checking thermostats, heating elements, electrical connections, and the sacrificial anode.
• Cost factors: Parts like heating elements are relatively inexpensive, but costs increase if major repairs are needed. Tank flushes and anode replacements are the main preventive jobs.

Gas Hot Water Systems

• Typical maintenance: Inspecting burners, gas connections, ventilation, and pilot or ignition systems.
• Cost factors: Regular servicing by a licenced gas fitter is crucial for safety and efficiency, which can add to the annual maintenance cost.

Solar Hot Water Systems

• Typical maintenance: Checking solar panels, pumps, valves, and the anti-freeze level in closed-loop systems.
• Cost factors: Solar components can be more expensive to replace, but less frequent maintenance is required compared to electric and gas systems.

Heat Pump Systems

• Typical maintenance: Inspecting the compressor, refrigerant levels, air filters, and the storage tank.
• Cost factors: Specialised servicing may be needed, potentially increasing maintenance costs versus a basic electric system.

General Maintenance Tips

• Regular servicing: Annual or biannual servicing is recommended for most systems to ensure optimal performance and warranty compliance.
• DIY checks: Homeowners can perform simple checks like inspecting for leaks or ensuring clearances around the unit.
• Long-term savings: Regular maintenance prevents costly repairs and extends the system’s lifespan.
• Anode rod replacement: Maintaining your anode rod protects your water heater tank from corrosion, extending its lifespan and saving you money on costly replacements. See our guide on hot water anode replacement for what’s involved.

Investing in an energy-efficient hot water system helps the environment and can lead to significant cost savings thanks to various rebates and incentives. Understanding the financial assistance available for eco-friendly hot water systems can be key in making your decision.

Available Rebates and Incentives in NSW

NSW residents replacing an older hot water system with a heat pump or solar unit can access two main rebate schemes that significantly reduce the upfront cost:

• NSW Energy Savings Scheme (ESS) and Peak Demand Reduction Scheme (PDRS) — point-of-sale discounts on eligible heat pump installations, calculated on the energy savings the new system will deliver over its lifetime. Read more on the NSW Government rebate page.
• Federal Small-scale Technology Certificates (STCs) — applied to eligible solar and heat pump systems at point of sale, calculated on the renewable energy the system is expected to generate or displace.

The combined rebate amount depends on the system type, your zone, the brand and model installed, and the age of the unit being replaced. For most Central Coast households replacing an old electric storage unit with a quality heat pump, the combined rebate typically reduces the installed price by $1,000 to $2,000.

How Rebates Reduce Your Out-of-Pocket Cost

Both schemes work as point-of-sale discounts rather than after-the-fact rebates, so you pay the discounted price upfront. As an accredited installer, we handle all the rebate paperwork end to end so the discount is applied at the till, not chased afterwards. You’ll see the rebate amount itemised on your quote and invoice.

A recent survey from Canstar Blue found that Solahart, known for solar hot water systems, received high customer satisfaction ratings, earning five stars in areas like features, performance, design, and overall satisfaction. It got four stars for value for money. Solahart specialises in rooftop and split system solar hot water heaters, using the sun’s energy, which can reduce energy costs and possibly increase home value. They also offer heat pump water heaters as an alternative.

In second place was Chromagen, who received a high customer satisfaction rating, earning five stars for value and four stars across other categories such as design, performance, features, and overall satisfaction. The brand offers various hot water systems including gas, heat pumps, and solar options. Its gas range features high energy efficiency, while the heat pump models come in different capacities. The solar options, appealing to eco-conscious consumers, include roof and split systems, available in 200L or 300L sizes.

In third place was Rinnai who received four stars for features, performance, design, and overall satisfaction, and three stars for value for money. The brand offers a variety of hot water systems, including continuous flow and solar systems, plus storage options. Its Infinity range, known for electronic gas flow systems, boasts energy efficiency ratings up to seven stars depending on the model. The Instantaneous line, including the compact Flowmaster 10, caters to those with minimal hot water needs, not requiring a power point for operation.

While brand surveys are a useful starting point, the right brand for your home depends on system type, capacity, your existing connections, and how long you plan to stay in the property. We service all major brands and give honest advice on which one suits your situation, with no manufacturer alignment driving the recommendation.

TrueFlow Plumbing and Drains is committed to delivering reliable hot water systems at competitive prices. We work with all leading brands in the industry to offer dependable advice and installations without a commercial bias toward any one manufacturer. With Dylan personally running every hot water callout across the Central Coast, you get a licenced local plumber who will quote honestly, install properly, and stand behind the work with a Lifetime Labour Guarantee.

If you’re researching pricing as a first step, head over to our hot water systems on the Central Coast service page for repair, replacement, and installation detail, or call Dylan on 0411 438 760 for a same-day written quote.