Air conditioning costs
Use the air conditioner’s average electrical input in kW, not its cooling capacity. Multiply by hours used and the usage tariff in dollars per kWh. Inverter systems vary their draw, so a measured average is preferable.
Australian energy guides
Understand your home energy costs
Use your actual electricity bill, equipment specifications and realistic usage assumptions. These guides explain how each estimate works.
Home battery savings
Compare electricity avoided by battery discharge against the feed-in revenue you forgo when charging from surplus solar. Consider round-trip efficiency, cycling, degradation and upfront cost.
Solar panel payback
Estimate the value of self-consumed generation at the avoided retail rate and exported generation at your actual feed-in tariff. Simple payback does not include financing or the time value of money.
EV home charging
Calculate battery energy from driving distance and vehicle consumption. Divide by charging efficiency to estimate electricity drawn from the wall, then apply the relevant tariff.
Planning solar and batteries in Perth
Western Australian households should check the import tariff, export credit and any time-of-use periods on their actual electricity plan. Your roof, daytime electricity use and installation quote can substantially change estimated solar or battery payback.
For a useful comparison, run the solar payback calculator using your own bill and quote, then test a battery scenario with the battery savings calculator. These tools do not verify eligibility for government incentives or guarantee installer prices.
Before making a purchase
Tariffs, feed-in rates, incentives and product performance vary. Verify current prices and eligibility with your provider. These calculators are educational estimates, not guaranteed savings or personalised advice.