Home Electrification & Renewable Energy in WA

Why All-Electric Makes Sense in Perth & WA

Perth has some of the highest solar irradiance in any Australian capital. Combined with falling battery costs and rising gas prices, electrifying your home — eliminating gas entirely — is increasingly the smartest financial and environmental choice.

This guide covers the technologies, costs, and practicalities of going all-electric in WA.

Solar PV System Sizing for Perth Homes

Perthu2019s high solar irradiance means most homes can comfortably support a larger system than they might in other Australian capitals, but the right size depends on your householdu2019s actual energy use, roof orientation and available space rather than simply fitting the maximum panels possible. Oversizing relative to your consumption can leave you exporting most of your generation at a lower feed-in rate than youu2019re paying for grid electricity, so itu2019s worth having a system sized against your actual usage pattern, not just your roof area.

Battery Storage: When It Makes Sense and Current WA Economics

A home battery lets you use your own solar generation in the evening rather than exporting it cheaply and buying it back later at a higher rate, but whether it pays for itself depends heavily on your household’s evening energy use, your current feed-in tariff, and the battery’s cost and warranty.

Batteries generally make more financial sense for households with significant evening electricity use, such as EV charging, than for a home that is largely empty during the day.

Heat Pump Hot Water Systems vs Gas and Solar Thermal

Heat pump hot water systems extract heat from the surrounding air to heat water, using a fraction of the electricity a conventional electric storage system would need, and outperform gas systems on running cost once gas is eliminated from a fully electric home.

Solar thermal systems, which heat water directly using rooftop collectors, can also perform well in Perth’s climate but typically cost more upfront and need a compatible roof orientation. For most all-electric WA homes, a well-sized heat pump system offers the best balance.

Induction Cooking and Eliminating Gas From the Kitchen

Induction cooktops heat the pan directly through electromagnetic induction rather than heating the air around it, which makes them faster and more responsive than most people expect when moving from gas, while also removing indoor combustion by-products from the kitchen entirely.

Eliminating gas from the kitchen is usually the final step in going fully electric, since gas hot water and heating tend to represent the bigger share of a household’s gas use, but it closes the loop on removing gas connection fees altogether.

EV Charging Readiness for New Builds

Even if you aren’t buying an electric vehicle immediately, running the conduit and allowing switchboard capacity for a future EV charger during construction is far cheaper than retrofitting it later. A dedicated circuit sized for a 7kW home charger, positioned near where a car would typically park, future-proofs the home without committing to purchase equipment before you are ready to use it.

WA Rebates, Incentives, and Feed-In Tariffs

Rebates and incentives for solar, batteries and electrification change more often than most other parts of this guide, so treat any specific figure as a starting point rather than a guarantee. Feed-in tariffs from Synergy and Horizon Power also shift periodically and directly affect the economics of both solar sizing and battery investment, so it is worth checking current rates before finalising a system size rather than relying on figures from when you started researching.

For how these systems fit into your overall build budget, see our Planning a Sustainable Home guide, and our professional directory is a good next step for getting quotes.