Heat Pump Hot Water Calculator
Compare your current hot water with a heat pump using your energy rates, running assumptions and installed quote.
What do you have now?
Rates and running assumptions
Use hot-water energy only, from your bills or installer estimates. Divide annual household energy by household size. These assumptions scale linearly with people; actual usage may differ.
Use the tariff when your hot water runs, e.g. 0.30 for 30 cents.
Use electricity input from the proposed system estimate, including backup heating, before rooftop solar.
Your upfront costs
Include installation, electrical work and removal. If the quote is already discounted, leave the discount below at zero.
Optional. Enter only an amount you have confirmed; eligibility is not calculated.
Leave at zero to compare with keeping your existing system. Otherwise enter the alternative installed quote after discounts.