Gas Hot Water Replacement Guide: Heat Pump, Electric or Solar?

Quick answer: gas hot water replacement

**Gas hot water replacement** is usually a choice between heat pump, electric storage, continuous electric or solar hot water. Heat pumps are often the practical electrification option for households replacing gas, but suitability depends on space, household size, electrical capacity, noise, rebates and installation cost.

Why replacement planning matters

Hot water systems often fail at inconvenient times. If you wait until there is no hot water, the fastest available replacement can become the default choice. That may be expensive or lock in another decade of gas use.

Planning before failure lets you compare quotes, check rebates and decide whether hot water is the right time to close or reduce your gas connection.

Victoria's 2027 rule

Victoria has introduced new building electrification regulations. The Victorian Government says that from 1 March 2027, when a gas hot water appliance in an existing owner-occupied home breaks and cannot be repaired, it must be replaced with an electric alternative, subject to exemptions.

For rental providers, related rules begin from 1 March 2027. When hot water or heating appliances break and cannot be repaired, they must be replaced with specified efficient electric alternatives, again with rules and exemptions.

Households outside Victoria should still check state rebates and building requirements, but the Victorian end-of-life rule is the clearest immediate policy trigger.

Option 1: Heat pump hot water

A heat pump hot water system uses electricity to move heat from the air into stored water. It is different from a standard electric resistance element.

Heat pumps can be attractive where:

• the home wants to reduce gas use;
• there is suitable outdoor or ventilated space;
• the household has solar and can run heating cycles during the day;
• rebates or discounts reduce upfront cost;
• a storage tank suits the household routine.

Check noise, installation clearances, climate performance, tank size and warranty.

Option 2: Electric storage hot water

Electric storage systems are familiar and can be cheaper to install in some cases. They heat and store water in a tank.

They may suit smaller households or properties where heat pump installation is difficult. However, standard electric resistance storage can use more electricity than a heat pump, so compare running costs carefully.

If you have controlled load or off-peak tariffs, ask whether the system can use those rates.

Option 3: Continuous electric hot water

Continuous electric units heat water as needed. They avoid a large storage tank, but may require significant electrical capacity.

They can suit compact homes with lower demand, but they are not automatically the right replacement for a gas continuous-flow unit. Ask a licensed electrician or plumber about wiring and switchboard requirements.

Option 4: Solar hot water

Solar hot water uses roof collectors and usually needs a booster for cloudy periods or high demand. It can suit homes with good roof space and orientation.

Compare it against rooftop solar plus a heat pump. For many households, solar PV powering an efficient heat pump may be simpler than a dedicated solar hot water system, but site conditions matter.

Questions to ask before choosing

Ask installers:

• What tank size suits the household?
• Is the location compliant and accessible?
• What electrical work is required?
• Are rebates or certificates included in the quote?
• What noise level applies?
• How long is the warranty?
• What happens to the old gas appliance?
• Can the system be timed to solar generation?

Get more than one quote if the system is not an emergency replacement.

Internal next steps

Compare gas plans at `/gas`, estimate gas usage at `/calculators/gas-cost`, compare electricity plans at `/electricity`, and read `/guides/victorian-gas-rules-2026` for Victoria-specific timing.

Sources

• Victorian Government: Electric and efficiency standards for buildings, https://www.energy.vic.gov.au/households/electric-and-efficiency-standards-for-buildings
• Victorian Government: Gas Substitution Roadmap, https://www.energy.vic.gov.au/renewable-energy/victorias-gas-substitution-roadmap
• Energy.gov.au: Electrification, https://www.energy.gov.au/households/electrification

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