Instant Gas to Electric Hot Water: Is It Worth Upgrading?
Instant Gas to Electric Hot Water: Is It Worth Switching?
Yes, where you want to move away from gas and prefer a simple, quiet storage system — but standard electric should be compared with heat pump before you commit.
Changing from instant gas to electric storage is a bigger physical change than a like-for-like replacement. The wall-mounted gas unit is replaced by a full storage cylinder, so you need tank space, drainage and a suitable electrical circuit. Standard electric is simple and usually cheaper to buy than a heat pump, but it uses resistance heating. If the site can accommodate a heat pump, we strongly recommend comparing that pathway as well because it can deliver the same stored-hot-water concept with much lower electrical demand.
Does Electric Storage Suit Your Gas Replacement?
This checks the main conversion factors. Final suitability still depends on tank location, household demand, electrical supply, drainage, plumbing and the exact system selected.
1What gas supply do you use now?
2Do you have room for a storage tank?
3What matters most?
Guide only. A licensed installer must confirm the final plumbing, gas, electrical, drainage, tank-base, ventilation and compliance requirements for the selected system and location.
Can You Replace Instant Gas With Electric Storage?
Yes. Instant gas can be replaced with standard electric storage where the property has a suitable cylinder location, drainage and electrical supply. The main change is that you move from continuous-flow water heating to a stored reserve, so the new tank must be sized for the household's peak demand.
Why Change From Instant Gas to Electric Hot Water?
The main reasons are usually electrification, simplicity, avoiding gas for water heating and the lower purchase price of a conventional electric cylinder compared with more complex high-efficiency systems.
Move Hot Water Off Gas
The new system heats with electricity, so natural gas or LPG is no longer required for normal hot-water production.
Simple Technology
Electric storage uses a tank and resistance element with no gas burner, flue, heat exchanger, compressor or fan.
Quiet Operation
A standard electric element heats silently, which can be useful where a tank must sit close to bedrooms or boundaries.
Lower Purchase Price
Standard electric storage is generally one of the lower-upfront storage pathways, although conversion work still needs to be allowed for.
Stored Reserve
A correctly sized tank gives the home a fixed reserve of hot water rather than relying on the continuous-flow output of the gas appliance.
But Compare Heat Pump
If the tank location is outdoors with useful airflow, a heat pump can usually use the same stored-water concept with a much lower electrical load. We highly recommend pricing it before deciding.
Instant Gas, Standard Electric & Heat Pump: Current Installed Today Starting Prices
Compare the product and conversion pathway together. Instant gas avoids a storage cylinder, standard electric usually has the lower electric-system purchase price, and heat pump usually has the strongest electrical-efficiency case.
Best where continuous-flow delivery, wall-mounted space saving and retaining gas are the priorities.
Current Installed Today collection starting price. Final cost depends on gas type, flow rate, installation scope and site conditions.
Simple, quiet and usually the lower-upfront electric-storage pathway once a suitable tank position and circuit are available.
No hot-water STC pathway applies to conventional resistance-electric storage.
If a storage position is being created anyway, heat pump often deserves the first long-term comparison because it can use the same basic tank format with far lower electrical demand.
Eligible heat-pump models may also qualify for STCs or additional state incentives where scheme requirements are met.
Instant Gas vs Standard Electric vs Heat Pump
| Consideration | Instant Gas | Standard Electric | Heat Pump |
|---|---|---|---|
| Hot-water format | Continuous flow | Stored water | Stored water |
| Main energy source | Natural gas or LPG | Electric resistance element | Electricity + heat from surrounding air |
| Ground tank space | Not normally required | Required | Required |
| Upfront system cost | Depends on gas appliance and conversion scope | Usually lower than heat pump | Usually higher before eligible incentives |
| Solar PV compatibility | PV cannot power the gas burner | Can use daytime solar with timer/diverter | Strongest fit Low electrical demand can be scheduled into solar production |
| Operating noise | Burner/fan operation varies by model | Very quiet | Compressor and fan operate while heating |
| STC pathway | No heat-pump/solar hot-water STCs | No hot-water STCs | Eligible listed models may qualify |
| Best reason to choose | Continuous delivery and compact wall-mounted format | Simplicity, quiet operation and lower upfront electric-storage cost | Lowest electrical demand and strongest solar-PV pairing |
The Biggest Change: Instant Gas Has No Storage Tank Site to Reuse
A continuous-flow gas unit is compact and wall mounted. Moving to either standard electric or heat pump means finding a full-size cylinder position and building the installation around it.
Tank Footprint
The new cylinder needs a stable, level base and sufficient space for the selected capacity and required clearances.
Hot & Cold Pipework
Existing services at the gas unit may be useful, but they normally need to be extended or rerouted to the new storage position.
Relief Drainage
Storage hot water requires compliant relief discharge arrangements that the old instant system did not need in the same way.
Electrical Supply
A standard electric cylinder usually needs a suitable dedicated supply and protection arrangement rather than relying on the light-duty power used by many gas continuous-flow units.
Service Access
Allow enough room for valves, element access, electrical work, anode servicing where applicable and eventual cylinder replacement.
Heat-Pump Opportunity
If the new position is outdoors and has good airflow, the same tank site may also suit a heat pump. That is why we recommend comparing it before completing the conversion.
What Happens to the Existing Gas Connection?
The redundant hot-water gas branch needs to be made safe as part of the conversion. Whether the property's broader natural-gas or LPG supply stays depends on what else still uses gas.
Keep the Property Gas Supply
Cooktops, heating, fireplaces or other gas appliances can continue using the existing supply while the old hot-water branch is isolated or altered appropriately.
Consider Full Gas Exit Separately
Once hot water moves to electricity, the household can separately consider whether the remaining gas meter, account or LPG setup is still required. The hot-water conversion itself does not automatically close the broader gas service.
Will the Existing Instant-Gas Power Point Run Electric Storage?
Do not assume so. Instant gas normally uses electricity only for controls, ignition or fans, while a conventional electric cylinder uses electricity as the main heat source. The required circuit, cable, isolation and protective devices must suit the selected storage system.
Dedicated Circuit May Be Required
The final electrical arrangement depends on the cylinder element rating, installation method and applicable electrical requirements.
Controlled Load May Be Possible
Depending on the property, retailer and system design, some electric storage systems can operate on a controlled-load or off-peak arrangement.
Solar Scheduling Is Different
If rooftop solar is available, daytime control can be considered instead of relying only on traditional overnight heating — but a heat pump should be compared because it uses the available solar electricity more efficiently.
Already Have Solar PV? Compare Heat Pump Before Standard Electric
Standard electric can absolutely be scheduled into the solar-production window, but timing does not change the efficiency of the resistance element. If a heat pump also suits the new tank location, we highly recommend it as the stronger solar-electric combination.
Instant Gas
Rooftop PV cannot supply the natural gas or LPG burned by the existing water heater.
Electric + Timer / Diverter
Daytime control can increase solar self-consumption, but the element still needs a relatively large electrical input whenever it heats.
Heat Pump + Solar
A heat pump can use a much smaller electrical input to transfer heat into the tank, leaving more rooftop generation available for the rest of the home.
If the only reason for choosing standard electric is “we have plenty of solar,” that is exactly when we would compare heat pump most strongly. A timer or Catch Power-style diverter can improve when a resistance tank heats, but the heat pump reduces how much electricity the hot-water load needs in the first place.
How Do You Convert Instant-Gas Flow Rate Into an Electric Tank Size?
There is no direct litres-per-minute to tank-litres conversion. Instant gas is sized around continuous-flow capacity, while electric storage must hold enough hot water to cover the household's peak use before the element recovers the tank.
Household Size
Occupants are the starting point, but shower habits and simultaneous demand matter just as much.
Bathrooms & Baths
Large baths, long showers and multiple bathrooms can increase the storage reserve required.
Peak Demand
Instant gas can keep producing while fuel and water flow are available. A tank must be large enough to survive the busiest period.
Heating Window
Off-peak or solar-timed systems may only recover during selected periods, which can increase the useful storage capacity required.
Element Size
Recovery time depends partly on the selected element and electrical arrangement, so tank litres cannot be considered in isolation.
Future Demand
Allow for growing families, renovations or extra bathrooms rather than choosing the smallest tank that works today.
When Instant Gas to Standard Electric Can Make Sense
Standard electric has a real place in this conversion. It is strongest where the customer values simplicity, quiet operation and lower upfront system cost more than maximum energy efficiency.
Lowest Upfront Electric Option Matters
When the budget is tight, conventional electric storage can be the simpler way to move hot water off gas.
The Tank Must Be Near Bedrooms
A silent electric element can be preferable where compressor and fan noise from a heat pump would be difficult to manage.
The Only Practical Tank Site Is Enclosed
An indoor or poorly ventilated location can suit standard electric better than a heat pump that needs useful airflow.
Hot-Water Demand Is Low
With very low usage, the absolute running-cost difference can be smaller, so the cheaper appliance can remain attractive.
Simplicity Is the Priority
Standard electric has no compressor, fan or refrigeration circuit, making the technology simple and familiar.
Heat Pump Would Require Disproportionate Work
If airflow, noise or relocation issues make the heat-pump scope materially harder, standard electric can be the practical fallback.
When We Would Recommend Heat Pump Instead of Standard Electric
Because both options need a storage cylinder, the question is often whether the extra upfront cost of the heat pump is justified. If even a few of the conditions below apply, our recommendation moves strongly toward heat pump.
You Already Have Solar PV
Heat pump lets the home use that solar generation with a much lower hot-water electrical load than a standard resistance tank.
You Have a Good Outdoor Tank Position
If the new cylinder site has airflow and sensible noise separation, one of the main reasons to prefer standard electric disappears.
You Use a Lot of Hot Water
The more energy the household spends on water heating, the more valuable the heat pump's lower electrical demand can become.
You Plan to Add a Battery
Lower hot-water demand preserves more stored electricity for the rest of the home rather than using it through a large resistance element.
You Expect to Stay Long Term
A longer ownership period gives the operating-energy advantage more time to offset the higher purchase price.
An Eligible Incentive Reduces the Price Gap
Where STCs or state incentives apply to a suitable heat pump, the net premium over standard electric can narrow enough that we would strongly favour the heat pump.
STCs: Standard Electric vs Heat Pump
Conventional resistance-electric storage does not create hot-water STCs. Eligible air-source heat-pump water heaters can create Small-scale Technology Certificates when the exact system and completed installation meet current scheme requirements.
No Hot-Water STC Pathway
The lower shelf price should be compared as-is against the complete heat-pump price after any eligible certificate or state-program benefit.
Eligible Models May Qualify
The exact model, installation zone, eligibility period, configuration and claim pathway matter. Supply-only purchase does not automatically complete the STC claim.
Supply Only vs Supplied & Installed
Installed Today supplies hot-water systems across supported Australian metro areas and offers supplied-and-installed options where available in eligible Brisbane and Gold Coast service areas.
Arrange the Complete Conversion Scope
Instant-gas-to-electric conversion can require licensed plumbing, gas and electrical work plus a new tank base, relief drainage and pipework. Confirm those items with your trades before ordering the product.
- Confirm the storage size before purchase.
- Confirm the tank position and drainage.
- Confirm gas isolation requirements.
- Confirm the new electrical circuit and controls.
Available Where Offered
Where an installed option is available, use the product installation choices to build the required scope. Final availability and price depend on the address, access, tank position, gas work, electrical requirements and selected system.
- Installation availability is location dependent.
- Conversion work is different from like-for-like replacement.
- Electrical upgrades can affect final cost.
- Check exactly what the selected package includes.
How an Instant-Gas-to-Electric Conversion Usually Works
Choose the Tank Position
Confirm space, base, drainage, service access and whether that same location could also support a heat pump.
Size the Storage System
Convert from litres-per-minute thinking to stored capacity and recovery based on peak household demand.
Plan Gas & Electrical Work
Make the redundant gas branch safe and provide the electrical supply, isolation and controls required by the new system.
Install & Commission
Complete plumbing, drainage, electrical setup and testing, then set the heating schedule to suit the household and tariff or solar strategy.
Instant Gas to Electric Hot Water FAQs
Can I replace instant gas hot water with an electric tank?
Yes. The property needs a suitable storage-cylinder position, tank base, relief drainage, plumbing route and electrical supply. The redundant gas branch also needs to be dealt with appropriately.
Is electric storage cheaper to install than a heat pump?
The standard electric appliance is usually cheaper to buy than a comparable heat pump, but both instant-gas conversions can require a new tank position, plumbing, drainage and electrical work. Compare the complete installed price rather than the product price alone.
Is standard electric cheaper to run than instant gas?
There is no universal answer because tariffs, gas prices, LPG costs, hot-water usage, tank losses and system efficiency vary. Standard electric can be inexpensive to buy, but resistance heating has a higher electrical demand than a heat pump and should not be treated as the efficiency-led electric option.
Should I choose electric storage or a heat pump when leaving gas?
Choose standard electric where lower upfront cost, silent operation or an enclosed tank site are the priority. If the property has a suitable outdoor storage location, rooftop solar or meaningful hot-water demand, we strongly recommend comparing heat pump because it can use much less electricity for the same stored-hot-water task.
Can I use solar panels with a standard electric hot-water tank?
Yes. A timer or solar-diverter control can move resistance heating into periods of rooftop-solar production. This improves solar self-consumption but does not change the underlying resistance-heating efficiency, so a heat pump remains the stronger comparison where the site suits one.
Do I need to remove the gas meter?
Not automatically. If other appliances still use gas, the property supply can remain while the old hot-water branch is made safe. If hot water was the final gas appliance, full gas disconnection or account closure can be considered separately.
Can the old instant-gas power point run the electric hot-water tank?
Do not assume so. The new electric-storage system uses electricity as its main heat source and may require a dedicated circuit, suitable cable, protection, isolation and a different control arrangement.
How do I compare a 26L instant gas unit with a 250L or 315L electric tank?
There is no direct litres-per-minute conversion. Instant gas is rated for continuous flow, while storage capacity must be selected around household size, peak shower demand, bath use, recovery time and heating schedule.
Can standard electric hot water receive STCs?
No hot-water STC pathway applies to conventional resistance-electric storage. Eligible air-source heat-pump water heaters may create STCs when the exact model and completed installation meet current scheme requirements.
When should I keep instant gas instead?
Instant gas can remain the more practical fit where there is no suitable ground space for a storage cylinder, continuous-flow delivery is important, gas is staying for other major appliances or the conversion work would be disproportionate.
Can I buy the electric hot-water system supply only?
Supply-only ordering is available on suitable products and delivery areas. Because this conversion can involve plumbing, gas and electrical work, confirm the complete licensed-trade scope before installation.
Leaving Instant Gas? Compare Standard Electric and Heat Pump Before You Decide
Standard electric is the simple, quiet and lower-upfront electric-storage pathway. But if the property has a suitable outdoor tank position — especially with rooftop solar — we strongly recommend comparing heat pump before committing, because the same conversion can deliver a much more efficient long-term hot-water setup.
