Home charging is the default for the vast majority of Australian EV owners. It's more convenient than public charging, available overnight, and significantly cheaper in almost every tariff scenario. The exact cost per charge depends on three variables: your EV's battery size, your electricity tariff, and whether you have rooftop solar.
According to the Department of Climate Change, Energy, the Environment and Water, EV uptake in Australia has accelerated significantly since 2023, and home charging infrastructure is now a mainstream consideration for new EV buyers. This guide works through the real numbers for 2026.
EV battery sizes and cost to charge in Australia, 2026
The first factor is battery capacity — how many kilowatt-hours your EV needs from empty to full. Most Australians don't charge from empty every day (top-up charging from 30–80% is more common), but full-charge cost is the simplest comparison.
| Vehicle (approx. usable kWh) | Flat rate (32 c/kWh) | ToU off-peak (18 c/kWh) | ToU peak (55 c/kWh) | Solar diversion (~0–5 c/kWh) |
|---|---|---|---|---|
| BYD Dolphin / MG4 Std (~45 kWh) | $14.40 | $8.10 | $24.75 | $0–$2.25 |
| Tesla Model 3 / Polestar 2 (~60 kWh) | $19.20 | $10.80 | $33.00 | $0–$3.00 |
| Tesla Model Y LR / Ioniq 5 LR (~75 kWh) | $24.00 | $13.50 | $41.25 | $0–$3.75 |
| Kia EV9 / BYD Sealion 7 (~100 kWh) | $32.00 | $18.00 | $55.00 | $0–$5.00 |
Solar diversion costs show a range of $0 to ~5 c/kWh because the true cost depends on whether the solar would otherwise have been exported at the feed-in tariff rate. If it would have been exported at 5 c/kWh, the "cost" is the opportunity cost of that foregone export, not zero. The saving compared to grid charging is still substantial — up to $19–$30 per charge on a large battery.
Four charging scenarios worked through
Scenario 1: Flat-rate tariff, overnight charging
You plug in when you get home at 7 pm and the car charges through the night. Tariff: 32 c/kWh (NSW average). Vehicle: Tesla Model 3 (~60 kWh).
- Cost per full charge: 60 × $0.32 = $19.20
- Average daily top-up (assume 15 kWh for ~80 km of commuting): 15 × $0.32 = $4.80/day
- Annual charging cost (assuming 85% home-charged): roughly $1,490/year
Scenario 2: Time-of-use tariff, scheduled off-peak charging
You use your car's built-in scheduled charging or a smart charger to start charging at 10 pm when the off-peak rate begins. Tariff: 18 c/kWh off-peak. Same vehicle.
- Cost per full charge: 60 × $0.18 = $10.80
- Average daily top-up (15 kWh): 15 × $0.18 = $2.70/day
- Annual charging cost: roughly $840/year — a saving of ~$650/year vs flat rate
This is one of the strongest arguments for a time-of-use tariff: an EV owner who can schedule overnight charging stands to save $500–$800 per year in charging costs alone — before counting the impact on household bill savings or disbenefits during peak hours. See the full guide on time-of-use vs flat-rate tariffs for how to evaluate the switch.
Scenario 3: ToU tariff, accidentally charging during peak
The car is plugged in at 5:30 pm and begins drawing power immediately. Tariff: 55 c/kWh peak. Same vehicle, same 15 kWh daily top-up.
- Daily top-up cost: 15 × $0.55 = $8.25/day
- Annual charging cost: roughly $2,556/year — $1,066 more than flat rate
This scenario illustrates why ToU tariff choice without a charging schedule is dangerous for EV owners. A 15 kWh charge during the 3–9 pm peak window is the single largest discretionary load most households have, and it falls precisely in the most expensive billing window. Always use scheduled charging if you are on a time-of-use plan.
Scenario 4: Rooftop solar diversion charging
You have a 6.6 kW solar system and park the EV at home during the day. A solar diverter or smart charger detects surplus generation — power that would otherwise be exported at 5 c/kWh — and redirects it to charge the vehicle.
- Surplus solar captured per day: assume 8 kWh (on a weekday with good sun and moderate household load)
- True cost per kWh: opportunity cost = 5 c (FiT foregone). Saving vs flat rate = 27 c/kWh
- Daily saving vs grid charging: 8 kWh × $0.27 = $2.16/day
- Annual saving on solar-covered charging (say, 200 sunny-to-moderate days): roughly $430/year
- On days with maximum solar, 15+ kWh can be diverted, covering most of the daily commute at near-zero incremental cost
Comparing EV home charging to petrol: $/100 km
| Scenario | EV cost/100 km (at 18 kWh/100 km) | Petrol equiv. (10 L/100 km at $2.00/L) | EV saving per 100 km |
|---|---|---|---|
| Flat rate (32 c/kWh) | $5.76 | $20.00 | $14.24 |
| ToU off-peak (18 c/kWh) | $3.24 | $20.00 | $16.76 |
| Solar diversion (~2 c/kWh net) | $0.36 | $20.00 | $19.64 |
| ToU peak (55 c/kWh) — avoid this | $9.90 | $20.00 | $10.10 |
Even in the worst EV scenario — accidentally charging during the peak rate — the per-kilometre fuel cost is half that of petrol. In the best scenario (solar diversion), it is one-fiftieth. For a household driving 15,000 km per year, switching from a 10 L/100 km petrol car to an EV charged on a ToU off-peak tariff saves approximately $2,514 per year in fuel costs alone.
To model the full financial picture including purchase price, maintenance and fuel over a typical ownership period, try the EV vs petrol calculator.
Why solar diverter chargers are the smart play for solar households
A solar diverter charger (also called a smart EV charger with solar boost or excess solar mode) monitors your home's net import/export in real time and adjusts EV charging to consume exactly the amount of solar that would otherwise be exported. Some models integrate directly with inverter APIs; others use a current transformer clamp on the main switchboard. Popular options available from CEC-accredited installers in Australia include units from Zappi, Tesla Wall Connector (with solar integration via powerwall), Fronius Wattpilot, and locally developed options.
The economic case: if your 6.6 kW system exports an average of 10 kWh/day that you currently receive 5 c/kWh for, that export is worth $0.50/day, or $182/year. If instead you divert that 10 kWh into your EV, you replace grid charging that would have cost 32 c/kWh — saving $3.20 rather than receiving $0.50. That's a $2.70/day or $986/year improvement from the same electrons. This is perhaps the most compelling case for why an EV and solar are a particularly strong combination.
Use the EV charger cost calculator to estimate the installation cost of a dedicated wall charger or solar-diverter unit for your home.
What about public charging costs?
This guide focuses on home charging, where the economics are clearest and the cost is lowest. Public charging in Australia varies widely: free destination chargers (shopping centres, some workplaces), paid AC chargers at 30–50 c/kWh, and DC fast chargers at 50–75 c/kWh on subscription networks or higher on pay-as-you-go. Most EV owners aim for 80–90% home charging and use public networks for longer trips. The overall blended charging cost is therefore closer to the home charging scenarios above for typical Australian drivers.
Sources
- DCCEEW — electric vehicles in Australia
- Australian Energy Regulator — Default Market Offer 2025–26
- ARENA — electric vehicle research and deployment programs
Last reviewed: — electricity rates verified against AER Default Market Offer 2025–26; fuel prices based on DCCEEW data.