Instant Gas to Electric Hot Water
Instant Gas to Electric Hot Water: Is It Worth Switching?
Moving off gas is straightforward in principle — but before choosing standard electric storage, compare the electrical load, solar strategy and long-term running cost.
Replacing instant gas with electric storage changes the home from compact continuous-flow hot water to a stored electric tank. The conversion can involve a new tank position, dedicated electrical supply, gas isolation, plumbing alterations and a different approach to sizing. Electric storage can be simple and affordable upfront, but if the property also suits a heat pump, it is worth comparing both electric pathways before locking in years of higher resistance-heating electricity use.
Is Standard Electric the Right Move?
Electric storage may suit perfectly — but if you're already changing fuel type, it is worth checking whether heat pump gives you a better long-term result.
1 Why are you leaving instant gas?
2 What electricity setup does the home have?
3 What matters most?
Guide only. Tank location, gas isolation, household demand, electrical capacity, solar configuration and the selected system need to be checked before finalising the conversion.
Can You Replace Instant Gas Hot Water With Electric Storage?
Yes. Instant or continuous-flow gas can be replaced with an electric storage hot-water system. The main physical difference is that the old gas heater is normally a compact wall-mounted appliance, while the new electric system needs a storage cylinder, suitable base, plumbing connections, drainage and an electrical circuit capable of supplying the heating element.
Tank Space
A wall-mounted gas unit takes very little room. Electric storage needs a suitable position for a full-size cylinder.
Electrical Circuit
The new resistance element needs an electrical supply sized and protected for the selected tank and element configuration.
Gas Isolation
The gas connection serving the old instantaneous appliance needs to be safely isolated and appropriately dealt with.
Stored-Water Sizing
Instant gas flow rate and electric tank litres are not directly comparable. Electric storage needs to be sized around household demand and recovery.
The Biggest Change: Continuous Flow Becomes Stored Hot Water
This conversion changes how the home receives hot water. Instant gas heats water as it passes through the appliance. Electric storage preheats a fixed amount of water and stores it until it is needed.
Continuous Heating
A correctly sized instant gas system continues heating while hot water is being used rather than relying on a stored volume.
It also takes very little physical space because the appliance is usually mounted externally on a wall.
Stored Capacity & Recovery
An electric tank gives the household a stored volume of hot water. Once enough hot water is used, the element needs time and electricity to reheat the cylinder.
Correct tank sizing becomes especially important for large households, baths and back-to-back showers.
Why Change From Instant Gas to Standard Electric?
There are genuine reasons to choose electric storage. It is simple, quiet and gives homeowners another pathway away from gas without introducing refrigeration equipment.
Remove Gas From Hot Water
Changing to electric removes natural gas or LPG from the water-heating process and may form part of a wider move toward an all-electric home.
Silent Operation
Conventional electric storage does not use a compressor or fan, which can suit noise-sensitive locations.
Lower Initial Appliance Cost
Standard electric storage can have a lower purchase price than a heat pump, particularly where a straightforward installation is possible.
Instant Gas, Electric & Heat Pump: Current JR Starting Prices
The cheapest appliance is not necessarily the cheapest system to own. These starting prices are read from JR's current live menu collections so you can compare the three pathways before deciding.
Usually the simplest replacement where the existing gas supply and location remain suitable.
Current JR advertised starting price. Final price depends on flow rate, gas type and installation scope.
Simple and quiet, with relatively low purchase cost but higher electrical energy use than heat-pump technology.
Current JR advertised starting price. Final price depends on tank size, new circuit requirements and installation position.
Usually higher upfront than basic electric storage, but substantially lower electricity consumption where the property suits installation.
Current JR advertised starting price. Eligible systems may also qualify for JR's applicable upfront STC pathway.
Instant Gas vs Electric Storage Hot Water
| Consideration | Instant Gas | Electric Storage |
|---|---|---|
| Energy source | Natural gas or LPG | Electricity |
| Hot-water delivery | Continuous flow when correctly sized | Stored hot water with element recovery |
| Physical footprint | Compact wall-mounted unit | Requires a storage-cylinder position |
| Noise | Burner and fan noise varies by model | Very quiet during normal heating |
| Solar PV | Cannot directly use rooftop solar electricity for the burner | Can be timed or controlled to use solar-generated electricity |
| Electrical demand | Normally limited compared with resistance water heating | Heating element creates the heat directly and requires substantial electrical input |
| Typical reason to switch | Stay with compact continuous hot water | Remove gas, gain simple stored electric hot water |
What Electrical Work Is Needed to Change Instant Gas to Electric?
This is one of the biggest parts of the conversion. The existing instant gas appliance does not normally provide the electrical infrastructure required to run a conventional electric storage element.
Dedicated Hot-Water Circuit
The selected electric tank needs an electrical circuit, cable and protection suitable for its element configuration.
Tank Location Matters
The new storage position can affect the cable route and the amount of electrical work required.
Switchboard & Tariff
Existing switchboard capacity, tariff arrangements and any timer or solar-control strategy should be considered before the final connection is chosen.
If You Choose Electric, Should You Add a Timer or Catch Power?
Often worth considering. Standard electric storage can be much smarter when the element is controlled around cheaper tariffs, free-power periods or rooftop solar generation rather than simply being allowed to heat whenever power is available.
Choose When the Element Runs
A timer can move heating into a selected period — for example during strong daytime solar production or a cheaper electricity window.
This can significantly improve the economics of electric storage without changing the tank itself.
Better Match to Available Solar
Suitable solar-control products such as Catch Power can help coordinate electric hot-water operation with household solar production.
That can reduce unnecessary grid imports when there is enough solar energy available.
Solar Can Make Electric Storage Cheaper — But It Does Not Make It a Heat Pump
On a sunny day with strong surplus generation, a well-controlled electric tank can use rooftop solar very effectively. The difference shows up when solar production drops, the house has other large loads or a battery is trying to cover the shortfall.
Sunny Day
A timer or solar relay can shift a large share of electric hot-water heating into a strong solar-production window.
Cloudy or Rainy Day
When PV production falls below the element's power requirement, the missing energy needs to come from the grid or another available source.
Solar + Battery
If battery discharge is allowed to support the hot-water circuit, a high-demand resistance element can use stored battery energy quickly.
A heat pump can also be scheduled into solar hours, but because it normally requires much less electrical input to produce the same useful hot water, there is generally less demand for the solar array, grid or battery to satisfy at any one time.
Before You Install Standard Electric, Compare Heat Pump as Well
This is particularly important on an instant-gas conversion because both electric storage and heat pump usually require a new tank position and electrical work. Once those changes are already part of the job, the difference between the two options can be smaller than simply comparing two appliance prices.
Both Need Tank Space
Moving away from instant gas means finding room for stored hot water regardless of whether the new system is conventional electric or heat pump.
Both Need Electricity
Either pathway requires suitable electrical infrastructure. The actual circuit requirements depend on the appliance selected.
Heat Pump Uses Less Electricity
Instead of creating all its heat through resistance heating, a heat pump transfers heat from the surrounding air into the stored water.
When Instant Gas to Electric Storage Can Be the Right Choice
We would not force a heat pump into every conversion. There are circumstances where conventional electric storage genuinely fits the priorities better.
Lowest Purchase Cost Matters Most
If the priority is getting off gas with the lowest practical initial appliance cost, standard electric can be attractive.
Noise Sensitivity Is High
Conventional electric storage operates without a compressor or fan and can suit positions close to bedrooms or neighbours.
Heat-Pump Airflow Is Impractical
A location with poor ventilation or unsuitable clearances may still accommodate standard electric storage where a heat pump would not be appropriate.
When Heat Pump Is Usually the Stronger Gas-to-Electric Upgrade
If your aim is broader than simply buying the cheapest tank today, heat pump deserves serious consideration before a new resistance-electric system is installed.
Lower Long-Term Electricity Use
The efficiency difference becomes increasingly important as household hot-water demand and years of ownership increase.
Rooftop Solar
Heat pumps can be scheduled into daytime solar hours while requiring less electrical energy than a comparable resistance-heating task.
Solar + Battery
Lower appliance electricity demand can leave more stored battery energy available for evening household loads.
Family-Sized Hot-Water Use
The more water a household heats each day, the more significant the energy-efficiency difference can become over time.
Suitable Outdoor Tank Position
If you already have a practical ground-level location with airflow, drainage and service access, one of the main barriers to heat pump has already been solved.
Eligible STC Pathway
An eligible heat pump can receive renewable-energy incentives that standard resistance electric storage does not receive.
What Happens to the Old Gas Connection?
Switching hot water to electric does not automatically mean the entire property gas service disappears. It depends on whether other gas appliances remain.
Keep the Main Gas Service
If the home still uses gas for cooking, heating, fireplaces or another appliance, the overall gas supply may remain active while the hot-water branch is dealt with separately.
Opportunity to Go Fully Electric
If hot water is the final gas appliance, changing to either electric storage or heat pump may provide an opportunity to consider whether the property needs an ongoing gas service at all.
How an Instant-Gas-to-Electric Conversion Works
Compare Electric & Heat Pump
Decide whether lowest upfront price or lower long-term electricity use carries more weight for the household.
Choose a Tank Position
Confirm physical space, plumbing distance, support, drainage and access for the new storage system.
Size the New System
Match tank volume and recovery to household occupancy and peak hot-water demand.
Disconnect Instant Gas
The old gas appliance is isolated and removed, with the hot-water gas connection appropriately dealt with.
Complete Electrical & Plumbing Work
The new circuit, tank, valves, water connections and drainage are installed as required.
Add Smart Control if Useful
Where suitable, a tariff arrangement, timer or solar-control relay can improve when a conventional electric tank consumes power.
Instant Gas to Electric Hot Water FAQs
Can you replace instant gas hot water with electric storage?
Yes. The conversion changes from a compact continuous-flow gas appliance to an electrically heated storage cylinder. Tank space, electrical supply, plumbing, drainage, gas isolation and household hot-water demand all need to be considered.
Is it worth changing instant gas to electric hot water?
It can make sense for households wanting to remove gas, prioritise silent operation or choose a simple storage system. If lower long-term electricity use is important and the property suits installation, a heat pump should normally be compared before committing to conventional electric storage.
Does instant gas to electric require a new electrical circuit?
Often. Instant gas systems generally do not provide the dedicated high-load hot-water electrical arrangement required by a conventional resistance storage tank. The final requirement depends on the selected electric system and the property's electrical infrastructure.
Where does the electric tank go?
The new tank needs a suitable storage-system position and does not need to occupy the exact wall location of the old instant gas heater. Plumbing distance, support, drainage, access and electrical routing should all be considered.
What electric tank size replaces a 26L instant gas system?
There is no direct litres-per-minute to tank-litres conversion. Instant gas flow rate describes continuous-flow capacity, while electric storage should be sized using household occupancy, bathrooms, shower use, peak demand, stored volume and recovery time.
Can I use solar panels to run electric hot water?
Yes. Electric storage can be timed or controlled so that more heating occurs while rooftop solar is generating. The benefit depends on available solar production, element demand, household loads and the home's electricity tariff.
Should I put a timer on electric hot water?
A suitable timer can be useful for shifting electric hot-water heating into a selected solar, off-peak or low-cost period. The control strategy still needs to allow enough heating time to meet household demand.
Can Catch Power be used with electric hot water?
Suitable solar-control products such as Catch Power can form part of an electric hot-water control strategy designed to better align heating with rooftop solar production. Product and electrical compatibility need to be confirmed for the property.
Does Catch Power make electric storage as efficient as a heat pump?
No. A timer or solar relay can improve when a resistance heater consumes electricity, but it does not change the resistance-heating process itself. A heat pump reduces electrical demand by transferring heat from the surrounding air.
What happens to electric hot water when solar production is low?
If the element requires more power than the solar system is producing, the shortfall needs to come from another available source such as the grid or, depending on the home's configuration, battery storage.
Can electric hot water drain a home battery?
It can use a significant amount of stored battery energy if the battery is configured to supply the resistance element. Suitable energy-management controls can be used to reduce unwanted battery discharge.
Is heat pump better than standard electric when converting from gas?
Where both systems suit the property, standard electric generally offers lower initial cost, quiet operation and simplicity, while heat pump generally offers substantially lower electricity consumption and stronger long-term energy efficiency.
What happens to the gas line after converting to electric?
The gas connection serving the old hot-water appliance needs to be appropriately isolated or altered. The broader property gas service can remain if other gas appliances are still in use.
Moving Off Instant Gas? Compare Both Electric Pathways First
Standard electric storage can be a simple, silent and cost-effective way to leave gas. If the property has a suitable position for a heat pump, compare the additional upfront cost against the substantially lower electricity demand before choosing the system you will live with for years.