Hot Water Energy Cost Estimator
Compare the running costs of different hot water system types and see how much you could save.
Energy consumption varies by system type and efficiency
Electric storage typically runs 3-5 hours; heat pumps 2-4 hours
WA average is ~$0.29/kWh (check your Synergy bill)
Off-peak tariffs can significantly reduce hot water costs
Estimates based on typical energy consumption patterns. Actual costs vary based on local rates, system efficiency, usage patterns, and weather conditions.
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08 7666 2806Hot Water System Comparison
| System Type | Annual Running Cost* | Upfront Cost | Lifespan |
|---|---|---|---|
| Electric Storage | $800 - $1,200 | $1,200 - $2,000 | 8-12 years |
| Gas Storage | $400 - $700 | $1,800 - $2,500 | 10-15 years |
| Gas Instantaneous | $350 - $600 | $2,000 - $3,000 | 15-20 years |
| eco Heat Pump | $150 - $350 | $3,500 - $5,000 | 10-15 years |
| wb_sunny Solar Hot Water | $100 - $250 | $4,000 - $6,500 | 15-20 years |
*Based on family of 4 in Perth using average hot water consumption. Actual costs vary.
Understanding Hot Water Running Costs
Hot water typically accounts for 25-30% of household energy use in Australia. The type of system you choose has a major impact on your energy bills.
Why Heat Pumps Cost Less to Run
Heat pump hot water systems are up to 4 times more efficient than traditional electric storage. They work like a refrigerator in reverse, extracting heat from the air rather than generating it directly.
- Electric storage: 1 kWh electricity = 1 kWh heat
- Heat pump: 1 kWh electricity = 3-4 kWh heat
- Savings: Up to 80% reduction in hot water energy costs
Off-Peak Tariffs Can Reduce Costs
In Western Australia, controlled load (off-peak) tariffs are available for hot water systems. Your system heats water during off-peak hours when electricity is cheaper, typically overnight.
Government Rebates Available
Heat pump and solar hot water systems qualify for Small-scale Technology Certificates (STCs) which reduce the upfront cost by $500-$1,000 or more. We handle the rebate paperwork for you.
Ready to Reduce Your Energy Bills?
Get a free assessment and find out how much you could save with an energy-efficient hot water system.