Hot water is one of the biggest costs in your home.
For most households, it can be up to 30% of your power bill. If your system is an old electric or gas unit, it might be quietly working against you every single day.
A heat pump hot water system changes that.
A heat pump heats your water using a fraction of the energy, and it keeps doing it reliably through a cold Victorian winter. It is one of the simplest upgrades you can make to bring down your running costs.
Here is what to look for, the rebates on offer and how a heat pump actually works.
Where Your Hot Water Costs Come From
Most homes still heat water the same way they did decades ago. An electric element tank uses 1 unit of power to produce 1 unit of heat. That is a straight one-to-one trade, and what makes it expensive.
Gas is a little different. An instantaneous gas system only heats water as you need it, so it is not storing hot water you are not using. But it has a catch that never goes away. Gas water can never be heated from a renewable source, which means it can never run on the free power from your own roof. In the long run, that makes it hard to sustain.
The trouble with hot water is that it runs in the background. You do not switch it on and off, so it is easy to forget it is even there. That makes it one of the most common reasons a bill lands higher than you expected, even when it feels like you have barely used any power.
For a lot of the homes we visit across Sunbury and the Macedon Ranges, hot water is one of the biggest energy users in the house.
How a Heat Pump Hot Water System Works
A heat pump does not make heat. It moves it. Using a refrigerant sealed inside the appliance, it pulls warmth out of the surrounding air, even on a cold day, and uses that warmth to heat the water in your tank.
The clever part is the efficiency. It uses about one unit of power to deliver roughly four units of heat, where an old electric element could only ever give you one for one.
It does a lot more with a lot less.
This is where the savings come from. A heat pump uses about one unit of power to deliver roughly four units of heat. Your old electric element could only ever give you one-for-one.
You get the same hot shower, the same full tank, for a quarter of the energy. Nothing about your comfort changes. Only the bill does.
This Is Not the Same as Solar Hot Water
It is worth clearing up a common mix-up. A heat pump is not rooftop solar hot water.
Old solar hot water panels sat on the roof and struggled badly in our winters. We have seen them crack, leak and freeze, and many needed a gas or electric backup anyway. A heat pump stays on the ground, so there is nothing on the roof to freeze or break. It works the same in July as it does in January.
Why It Costs So Much Less to Run
Because a heat pump does more with less, it cuts the energy you use to heat water by up to 75% compared to a traditional electric system. It also gives you the option to run it off your solar.
Same hot showers, same full tank, for about a quarter of the energy.
There is a second part that matters just as much as total energy. A heat pump draws power at a much lower rate. It sips energy slowly rather than pulling a big load all at once.
That lower draw is what lets it sit neatly under your solar production. So no matter the size of your system, most homes can cover their hot water with solar, even in winter.
It also reheats quickly. Depending on the system, a heat pump can produce around 90 litres of fresh hot water an hour. So if you ever do run the tank low, you are not left waiting for the whole thing to reheat before there is enough for a hot shower.
Does It Still Work in Winter?
This is the question we hear most, and it is a fair one. The good news is yes. A quality heat pump keeps working through the coldest mornings we get.
The systems we install are designed to run in temperatures as low as minus 10 degrees, with no need for an electric booster to help them along. They have built in freeze protection for exactly the frosty conditions we see around Woodend, Gisborne and Kyneton.
How to Choose Your Hot Water System
Not every heat pump is the same, so it is worth knowing what separates a good system from a cheap one. These are the things we look for when we help a customer choose.
- A long tank warranty: The best systems, like the Reclaim units we install, come with a 15-year tank warranty, so you can trust it for the long haul.
- Local support and rebates: An Australian-made unit is backed by local support and parts, and it unlocks the larger government rebate of up to $1,400.
- Quiet operation: The better units run at around 37 decibels from a metre away, quieter than the hum of your fridge, so you can place one near living areas without the noise bothering anyone.
- A smart controller: Look for one that lets you set it to run in the middle of the day, soaking up your free solar instead of buying power from the grid.
- The right tank size: Sizes from 160 to 400 litres mean the system can be matched to your household, so even a busy morning does not leave anyone with a cold shower.
Whichever system suits your home, these are the things that matter most. We are happy to walk you through the options and help you land on the right one.
The Rebates That Bring the Cost Right Down
This is where the numbers really move. Most homeowners in Victoria can claim more than one rebate, and stacked together they take a serious chunk off the upfront cost.
Stacked together, these rebates can take a couple of thousand dollars off the price of your upgrade.
- Solar Victoria hot water rebate: Up to $1,000, or up to $1,400 if you choose a locally made unit like Reclaim.
- Small-scale Technology Certificates (STCs): A federal discount your installer applies to the price upfront.
- Victorian Energy Upgrades (VEECs): A state discount, also applied upfront by the installer.
The Solar Victoria rebate has a few conditions. You need to own and live in the home, the system you are replacing must be at least three years old, and from the 1st of July 2026 the household income cap is $150,000 a year. If you have already claimed a solar battery rebate on the property, you cannot claim the hot water one as well.
Rebate values and rules change often, so the safest thing is to get a current figure at the time you upgrade. When we quote a system, we work out exactly what you qualify for and take it off the price, so there are no surprises.
Made for Solar
If you already have solar, or you are planning it, a heat pump is the perfect partner. Its slow, steady draw sits neatly under a typical solar day, and a smart controller can set it to heat your water while the sun is up.
Pair it with solar and your hot water can run on sunshine you have already paid for.
The Bottom Line
A heat pump heats your water by moving warmth from the air, which is why it uses so little power to run. It works through a cold winter, it pairs well with solar, and the rebates make the upgrade easier than most people expect.
If your old electric or gas system is getting on, this is one of the smartest and most overlooked ways to bring your bills down.
If you are weighing up a hot water upgrade, we are happy to walk you through the options with no pressure and no jargon. Book a free on-site consult.
Frequently Asked Questions
How Much Can a Heat Pump Save on My Hot Water Bill?
A heat pump can cut the energy used to heat your water by up to 75% compared to an old electric element system. The exact saving depends on your household size and how you use hot water, but for most homes it is a big drop. The savings are even greater if you run it on your own solar.
Do Heat Pumps Work in Cold Victorian Winters?
Yes. The Reclaim CO2 systems we install are built to run in temperatures as low as minus 10 degrees, with freeze protection for frosty mornings. Unlike old rooftop solar hot water, the unit sits on the ground, so there is nothing to freeze or crack up top.
Is a Heat Pump the Same as Solar Hot Water?
No. Solar hot water uses rooftop panels to heat water directly and often struggles in winter. A heat pump pulls warmth from the surrounding air and runs on electricity, so it can be powered by your solar panels while working reliably all year round.
How Loud Is a Heat Pump Hot Water System?
Quieter than most people expect. The units we fit are rated at around 37 decibels from a metre away, which is roughly the sound of a quiet library. Placed correctly, you will barely notice it running.
What Rebates Are Available for Heat Pump Hot Water in Victoria?
You may be able to claim the Solar Victoria hot water rebate of up to $1,000, or up to $1,400 for a locally made unit like Reclaim, plus federal STCs and state VEECs applied as upfront discounts. Eligibility and values change, so we confirm exactly what you qualify for when we quote.