Australian energy bills have risen sharply. The average household electricity bill is now $1,600-$2,200 per year, depending on your state and usage.

Some of the advice for reducing bills is useful. Some is negligible. Here’s what actually moves the needle.

The Big Three

Three things account for most household energy use: heating and cooling (40%), water heating (25%), and appliances (35%).

Reducing any of these by even 10-20% produces noticeable bill savings. Reducing all three compounds the effect.

Heating and Cooling

Set your thermostat realistically. Every degree of heating above 20°C adds about 10% to your heating costs. Every degree of cooling below 25°C adds a similar percentage.

Setting heating to 19-20°C and cooling to 25-26°C saves hundreds of dollars per year compared to 22°C heating and 22°C cooling.

Use zoning. Only heat or cool the rooms you’re using. Close doors to unused rooms. If your system has zone controls, use them.

Insulation is the highest-return investment. Ceiling insulation prevents heat escaping in winter and entering in summer. If your home is poorly insulated, insulation pays for itself in two to three years through energy savings.

Fans before air conditioning. A ceiling fan costs about 2 cents per hour to run. An air conditioner costs 20-60 cents per hour. Use fans for comfort and air conditioning only when necessary.

Hot Water

Temperature. If your hot water system is set above 60°C at the tank (50°C at the tap), you’re heating water hotter than necessary and paying for it. Check the thermostat on your system.

Shorter showers. Yes, this advice is repeated everywhere because it works. A four-minute shower instead of an eight-minute shower halves your hot water usage from showering.

Heat pump hot water. If your hot water system needs replacing, heat pump systems are dramatically more efficient than traditional electric or gas systems. Government rebates are available in most states, making the upfront cost manageable.

Appliances

Your fridge runs 24/7. Make sure the seals are intact, it’s not set too cold (4°C for the fridge, minus 18°C for the freezer is optimal), and there’s adequate ventilation behind it.

Washing in cold water saves about $100 per year compared to warm or hot washing. Modern detergents work effectively in cold water.

Dryer vs clothesline. A dryer cycle costs $1-$2. Australian sunshine is free. Air drying saves $200-$400 per year for a typical family.

LED lighting. If you still have old incandescent or halogen bulbs, replacing them with LEDs is the simplest energy efficiency upgrade. Each LED bulb saves about $15 per year in electricity. Across a house of 20 bulbs, that’s $300 per year.

Solar Panels

If you own your home, solar panels are one of the best financial investments available.

A 6.6kW system costs $4,000-$7,000 after government rebates. It saves $1,200-$1,800 per year in electricity costs. Payback period: three to five years.

After payback, you’re getting free electricity for the remaining 20+ years of the system’s life.

The economics are slightly less compelling for feed-in tariffs (you get paid less for exporting than you pay for importing), but still strongly positive.

Compare Retailers

This is the easiest, fastest saving available.

Australian energy retail is competitive. Different retailers charge different rates. Many people stay with their default retailer and pay more than necessary.

Use the government’s Energy Made Easy (energymadeeasy.gov.au) comparison tool to compare plans in your area. Switching takes ten minutes and can save $200-$500 per year.

Check again every twelve months. Plans change, and loyalty is not rewarded in energy retail.

Time-of-Use Tariffs

If your area offers time-of-use pricing, electricity is cheaper during off-peak hours (usually overnight and weekends) and more expensive during peak hours (afternoon and evening on weekdays).

Shift energy-intensive activities to off-peak times: run the dishwasher overnight, do laundry on weekends, charge devices overnight.

If you have solar panels, this becomes even more valuable: use solar during the day, shift remaining usage to off-peak times, and minimise expensive peak consumption.

Government Rebates

Various state and federal rebates are available for:

• Solar panel installation
• Heat pump hot water systems
• Home insulation
• Energy-efficient appliance upgrades

Check your state government’s energy website for current offerings. These change regularly but can significantly reduce the upfront cost of efficiency upgrades.

The Quick Win List

If you want to reduce your bill this month:

1. Compare energy retailers (potential saving: $200-$500/year)
2. Set thermostat to 20°C heating, 25°C cooling (potential saving: $200-$400/year)
3. Switch to cold water washing (potential saving: $100/year)
4. Replace remaining non-LED bulbs (potential saving: $150-$300/year)
5. Use the clothesline instead of the dryer (potential saving: $200-$400/year)

Combined, these five changes could save $800-$1,600 per year. That’s real money for minimal effort.