Electric Hot Water Systems Perth

Electric hot water systems are the most common type in Australian homes. While they have higher running costs than heat pumps or gas, they offer simple installation, reliable operation, and lower upfront costs.

Electric Storage Systems

Traditional tank systems heat water using electric elements. A thermostat maintains the set temperature.

How They Work

1. Cold water enters the tank
2. One or two heating elements warm the water
3. Hot water rises to the top of the tank
4. Thermostat maintains temperature (usually 60°C for compliance)
5. Hot water drawn from top when taps opened

Tank Sizes

Standard sizes for Perth households:

Off-peak users typically need larger tanks to store enough hot water through peak periods.

Electric Instantaneous Systems

Point-of-use units heat water on demand. Best for specific applications rather than whole-house supply.

Best for:

• Single-point applications (under-sink units)
• Remote fixtures far from main water heater
• Low-usage situations

Not recommended for whole-house supply due to high electrical demand and installation costs.

Running Costs: The Reality

Electric storage systems are typically the most expensive to run:

This is why we often recommend heat pump upgrades when replacing old electric systems.

When Electric Makes Sense

Electric storage remains appropriate when:

• Budget constraints prevent heat pump purchase
• Upgrading to heat pump isn’t structurally feasible
• As a temporary solution
• In rental properties where tenant pays electricity
• Off-peak tariffs are available and tank can be sized accordingly

We provide honest advice about your options.

Off-Peak Tariffs

Synergy offers cheaper electricity rates during off-peak hours. Connecting your water heater to off-peak can reduce running costs by 30-40%.

Requirements:

• Separately metered circuit
• Tank large enough to provide hot water through peak hours
• Timer or controlled load arrangement

We can arrange off-peak connection during installation or as a standalone upgrade.

Maintenance and Lifespan

Electric systems need periodic maintenance:

Anode Replacement

The sacrificial anode protects the tank from corrosion. It should be checked every 3-5 years and replaced when depleted. This is the single most important maintenance task for extending tank life.

Element Replacement

Heating elements can fail, especially in hard water areas. Signs include:

• No hot water
• Slow heating
• Tripped circuit breaker

Element replacement is straightforward and far cheaper than tank replacement.

Temperature and Pressure Relief Valve

Should be tested annually to ensure it operates correctly. This valve is a critical safety device.

Upgrade Path to Heat Pump

When your electric system needs replacement, consider upgrading to a heat pump:

• Uses same basic plumbing connections
• Often fits in same location
• STCs rebate reduces price gap
• Running cost savings deliver payback in 4-6 years
• Lower emissions

We assess your situation and provide honest recommendations about whether upgrading makes sense for you.