Make the most of your time of use plan with GridSmart
GridSmart Hot Water Savings Calculator
Your hot water usage
Make your hot water cylinder work smarter for you.
min
min
Electricity prices
For more on electricity prices, visit sites like Billy or Powerswitch.
$
/kWh
Used as the baseline for savings
$
/kWh
$
/kWh
Your potential savings
Estimated annual hot-water savings for each type of electricity plan.
Assumptions
Cylinder charged to 70°C.
Showers at 10 litres/minute at 40°C.
Cold water at 15°C.
Charge is limited by element kW multiplied by cheaper-period hours available.
GridSmart can shift up to 75% of storage capacity into a single cheaper window.
Beyond this shift, GridSmart can shift 30% of every kWh used, without exceeding cheaper-window capacity.
For two cheaper periods, GridSmart prioritises the cheaper window. If night is cheaper than off-peak, off-peak charging is generally limited to what is needed for evening hot-water use.
