A Complete Guide to Pros and Cons, Running Costs and Upfront Investment
Hot water systems are essential in every Australian home. When it comes to choosing the right type, an electric hot water system is one of the most common options — and for good reason. Whether you’re replacing an old unit or installing a system for the first time, understanding how these systems work, their advantages and limitations, and how costs stack up can help you make the best decision for your household.
What Is an Electric Hot Water System?
An electric hot water system uses electricity to heat water, typically stored in a tank until it’s needed. This category includes different setups, but the most common in Australian homes is the electric storage hot water system. In these systems, cold water is heated in a well-insulated tank and held ready for use in showers, baths, washing machines and dishwashers.
Another type of electric hot water heater is the instantaneous or tankless electric unit, which heats water on demand without storing it. However, these are less common in standard Australian homes due to high electrical demand requirements.
Pros of Electric Hot Water Systems
Electric hot water systems offer several benefits that make them a popular choice for many homeowners.
Easy Installation
Electric systems are generally straightforward to install, especially if replacing an existing electric storage system. You don’t need gas lines or complex ventilation, which simplifies setup and reduces installation complexity.
Lower Upfront Cost
Compared with gas or solar hot water systems, electric units — particularly electric storage hot water systems — often have a lower upfront price. That makes them an attractive option for budget-aware homeowners.
Reliable Performance
Electric systems provide consistent hot water without dependency on gas supply. This is especially helpful in areas where natural gas isn’t available.
Wide Availability
Since they are common, parts and service technicians for electric hot water systems are readily available across Australia. This can make servicing more convenient and affordable.
Good for Smaller Households
For smaller homes or properties with moderate hot water usage, an electric system can be a practical and efficient solution, particularly if peak demand isn’t excessive.
Cons of Electric Hot Water Systems
No system is perfect, and electric hot water systems come with limitations that should be considered.
Higher Running Costs
Electricity usually costs more than gas per unit of energy, which means an electric hot water system can be more expensive to run compared with gas alternatives, especially in households with high hot water demand.
Heat Loss From Storage Tanks
An electric storage hot water system heats and stores water in a tank. While modern tanks are well insulated, they still experience some heat loss over time — known as standby loss — which can increase energy consumption.
Slower Recovery
After a large draw of hot water (for example, back-to-back showers), the system’s recovery time — how long it takes to reheat the tank — may be slower than commercial or high-efficiency alternatives.
Dependent on Electricity Supply
In the event of a power outage, an electric hot water heater won’t operate. This may be a consideration in areas with unreliable supply or frequent outages.
Electric Hot Water System vs Other Types
To decide if an electric system is right for you, it helps to compare it with other popular hot water options.
Gas Hot Water Systems
Gas systems generally offer lower running costs because gas prices are often lower than electricity prices. They typically heat water faster and may have a longer lifespan, but they require gas supply lines and sometimes additional ventilation, raising installation costs.
Solar Hot Water Systems
Solar is one of the most energy-efficient options and can significantly reduce running costs. It often needs a backup electric or gas booster, especially during cloudy periods, and upfront costs can be higher due to panels and installation.
Heat Pump Systems
Heat pumps use electricity more efficiently by extracting heat from the air to heat water, often cutting running costs. They have higher upfront costs and require more space and installation planning.
Upfront Cost vs Running Costs
When selecting a hot water system, it’s important to weigh both upfront investment and ongoing expenses.
Upfront Cost
Electric hot water systems are usually affordable to purchase and install. This makes them a strong option if you’re replacing an existing electric unit or want a straightforward installation without additional infrastructure.
Running Costs
Electric systems can cost more to run than gas systems, especially with higher electricity prices. If your household uses a lot of hot water, these costs can add up — particularly if the water is used throughout the day or during peak electricity pricing periods.
One way to reduce this impact is to install the system with a timer or use off-peak tariffs (if you have access). By heating water overnight when energy is cheaper, you can reduce your bills significantly.
Which Households Are Best Suited to Electric Hot Water Systems?
Electric hot water systems may be ideal in the following scenarios:
Smaller or Medium Households
If your family isn’t large and your daily hot water use is moderate, an electric storage hot water system can reliably meet your needs without excessive running costs.
Properties Without Gas Supply
For homes that do not have a natural gas connection, an electric system is often the default choice. It delivers consistent hot water without the need for additional gas infrastructure.
Budget-Focused Upgrades
When upfront cost and installation simplicity are priorities, electric systems often offer the best value compared with gas or solar options.
Tips for Maximising Efficiency With Electric Hot Water
Even with a higher running cost profile, there are ways to make your electric hot water system more energy efficient:
Choose the Right Tank Size
Oversized tanks can waste energy, while undersized systems may struggle to meet demand. A qualified plumber can recommend the best size based on your usage patterns.
Use Timers and Off-Peak Tariffs
If your energy provider offers off-peak rates, install a timer so the system heats water during cheaper times. This can significantly lower running costs.
Insulate Hot Water Pipes
Adding insulation to hot water pipes reduces heat loss between the tank and taps, meaning you use less energy overall.
Regular Maintenance
Flushing your tank yearly and checking the thermostat and heating elements helps keep your system running efficiently and extends its lifespan.
Electric Hot Water Systems and Environmental Considerations
Electric systems can have a higher carbon footprint if your electricity comes primarily from fossil fuel sources. However, as Australia’s energy grid incorporates more renewable power, electric hot water systems may become a cleaner option over time.
Pairing your system with solar panels or a solar battery can also reduce reliance on grid power, lowering both emissions and running costs.
Final Thoughts
An electric hot water system remains a popular choice for many Australian homes due to its reliability, lower upfront cost, ease of installation and widespread support. While running costs can be higher than gas or heat pump alternatives, smart usage and energy-saving strategies can help balance long-term expenses.
Understanding your household’s hot water demand, energy usage patterns and budget will help you choose the best system. Whether you’re interested in a traditional electric storage hot water unit or an efficient electric hot water heater setup with smart controls, Efficient Pure Plumbing can guide you every step of the way.
Ready to Upgrade or Install an Electric Hot Water System?
Contact Efficient Pure Plumbing for expert advice, tailored recommendations and professional installation. We’ll help you choose the right system for your home and ensure it runs efficiently for years to come.
