How much does hot water really cost?
Hot water needs the same amount of energy either way. What changes the cost is when that energy is used.
The same amount of electricity. Very different underlying economics.
Mercury
4,380 kWh at Mercury’s 28.92c/kWh
variable energy rate.
Heatr
4,380 kWh shifted into lower-cost
wholesale periods.
Wholesale energy cost against a retail energy rate: it shows the underlying economics, and is not a retail savings forecast. How this is calculated ↓
How this is calculatedThe evidence behind ~$98
Cumulative wholesale energy cost through each year
The load
12 kWh a day: 4,380 kWh a year.
Each day’s hot-water energy requirement is shifted into the lowest-cost suitable wholesale periods available that day, within the heating capability of the cylinder.
The prices
Electricity Authority final energy prices at the PEN0331 pricing node.
What’s included
Heatr figures are wholesale energy only.
What’s not included
GST, network charges, metering, levies, retailer costs and margins, and fixed charges.
The Mercury comparison uses its 28.92c/kWh ex-GST variable retail energy rate only.
Electricity is cheap when you can choose when to use it.
Electricity prices vary depending on when energy is consumed. A hot-water cylinder gives us something valuable: storage.
We shift when the water heats — not when you shower.
Lower-cost electricity
Heating is scheduled for when electricity costs less.
Heat
The cylinder’s element turns that electricity into heat.
Stored hot water
The insulated cylinder holds that heat for hours.
Used later
Showers and taps as usual — nothing changes for the household.
Don’t use an expensive battery to heat your hot water.
Your hot-water cylinder is already a thermal battery.
If the energy is ultimately needed as hot water, it can be stored directly as heat rather than first storing electricity in an expensive electrical battery and later converting it to heat.
That physical thermal storage is already installed in millions of homes.
Heatr makes that storage intelligent.
Heatr understands how much useful energy is stored in the cylinder and controls when it heats, while maintaining the hot water the household needs.
See how Heatr works →Want cheaper electricity at home? Meet Shifted Energy.
Heatr provides the load-control technology. Shifted Energy is where that flexibility could show up on a household bill.
Here’s your week’s power.
- Heatr Hot WaterIllustrative line item
- $10.00
- Other electricity
- $15.46
- Network costs
- $12.21
- Subtotal · GST
- $37.67 · $5.65
- Total
- $43.32
Illustrative concept showing how intelligently shifted electricity could appear on a household bill.