Savings calculator

Use this savings calculator as a guide to understand your savings with GridSmart and make the most of your energy plan.

GridSmart Hot Water Savings Calculator

Your hot water usage

Make your hot water cylinder work smarter for you.

Cylinder size in litres

Cylinder element size in kW

Total morning showers 7am to 11am, minutes per day

min

Total evening showers 5pm to 9pm, minutes per day

min

For more on electricity prices, visit sites like Billy or Powerswitch.

Peak energy cost Used as the baseline for savings

/kWh

Off-peak energy cost

/kWh

Night energy cost

/kWh

Estimated hot-water savings by power plan.

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.
Savings are calculated against the peak rate.