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EV charging at home

Most electric vehicle (EV) owners do most of their charging at home. You can charge from a standard power point, or install a dedicated wall charger for faster, more convenient charging.

How fast a car charges at home depends on three things together: the charger, your home's electricity supply, and the car's own on-board charger. The slowest of the three sets the speed.

What it can do for you

  • Charge overnight or while the car is parked, without visiting a public charger.
  • Choose when to charge — for example during cheaper periods on your plan or when your solar is producing.
  • A dedicated charger is designed for long, continuous charging sessions.

How it works

What limits home EV charging speedElectricity flows from the home supply, which is single-phase or three-phase, to the wall charger, which has its own kW rating, to the car's on-board charger, which converts AC to DC and has a maximum AC rate, and then into the car's battery. The actual charging rate is the lowest of the supply, the wall charger and the on-board charger.Home supplySingle- or three-phaseWall chargerRated kW (AC)On-board chargerCar's max AC rateCar batteryStores kWh (DC)Charging rate = the lowest of supply, wall charger and on-board chargerA higher-rated wall charger cannot exceed the car's on-board charger limit.Three-phase ratings need a three-phase supply and a car that accepts three-phase AC.
Technical details
Charging levels
Level 1 uses a standard power point and the portable cable supplied with many cars — slow, but enough for some drivers. Level 2 uses a dedicated AC wall charger and is noticeably faster. Level 3 (DC fast charging) bypasses the on-board charger and is found at public sites, not usually at homes.
The on-board charger limit
Every EV has a maximum AC charging rate set by its on-board charger. A 22 kW wall charger does not make every car charge at 22 kW — a car whose on-board charger accepts, for example, 11 kW on AC will charge at no more than that, whatever the wall charger is rated for.
Single-phase versus three-phase supply
Most homes have a single-phase supply, which limits a wall charger to a lower output than a three-phase supply allows. Higher-rated chargers often need three-phase power, and the car must also support three-phase AC charging to use it.
Part of household electrification
An EV charger is often one of several electric upgrades, alongside heat pumps, reverse-cycle air conditioning and induction cooking. Together they can raise how much power the home draws at once, so it helps to plan them as a whole: what runs when, whether load management is needed, and whether the supply or switchboard needs work.
Load management
A charger can share your home's supply with other appliances. Load management (or dynamic load balancing) reduces the charging rate when the house is using a lot, which can avoid an expensive supply upgrade.
Solar charging
Some chargers can follow your solar output, charging from spare solar when it is available. How much of the car's charging solar can cover depends on when the car is at home and how much spare solar there is.

Terms people often mix up

Charger rating (kW) vs actual charging rate
The actual rate is the lowest of the charger's rating, the home supply and circuit, and the car's on-board charger.
Single-phase vs three-phase supply
The type of supply to your home limits the highest practical home charging rate; a three-phase charger on a single-phase home cannot reach its three-phase rating.
Power (kW) vs energy (kWh)
The car's battery size is energy (kWh); the charger's rating is power (kW). Energy divided by power gives a rough charging time, before charging losses and tapering near full.
Grid import vs total consumption
Adding an EV increases your home's total consumption. Solar or a battery may cover part of it, reducing the extra grid import.

Advantages and limitations

Advantages

  • Advantage: Convenient: the car charges while it is parked at home.
  • Advantage: You control when charging happens, which can suit time-of-use plans or solar.
  • Advantage: A dedicated charger is built for continuous high current, unlike an ordinary power point used for long periods.
  • Advantage: Smart chargers can schedule charging, follow solar output and manage load.

Limitations

  • Limitation: A wall charger cannot charge a car faster than the car's on-board charger or your home supply allows.
  • Limitation: Installation may need switchboard work, new cabling or a supply upgrade, which adds cost.
  • Limitation: Apartments and strata buildings may need body corporate approval and shared metering arrangements.
  • Limitation: Charging from the grid in peak periods can be expensive on some plans.
  • Limitation: If many people in your street add chargers, networks may set conditions on high loads.

Financial considerations

1. Quick estimate

Your postcode, yearly use, your car, how far you drive, the charger and your supply, and the rates from your bill are enough for a first estimate.

Everything is calculated in your browser. Nothing you type here is sent to PlaceNest or anyone else, and you don't need an account. Fields marked as required are needed for the estimate.

Your home & usage

A recent electricity bill has everything this section needs.

Your home's 4-digit postcode — used to estimate sunshine and to find programs for your state or territory.

How would you like to tell us your electricity use?

Your retailer's app or bill may show it; or multiply the bill's 'average daily use' by 365. Main meter only — leave out a separately metered controlled load (e.g. off-peak hot water).

Your car, charger & quote

From your car's specifications, the charger quote and your switchboard.

From the manufacturer or a review of your car.

Your odometer over a year, or a service record.

In the car's specifications.

The on-board charger rating in the car's specifications (often 7.4 or 11 kW).

On the charger quote, e.g. 7 kW.

On your meter or switchboard, or ask an electrician. Most homes are single phase.

The charger plus installation, including GST, from your electrician's quote.

Your tariff

Copy these from your bill or your retailer's plan details (the “energy fact sheet”), then tell us whether they include GST. We never fill in a price for you.
Your tariff type

Your bill says whether you pay one price all day or different prices at different times.

On your bill as “usage”, “general usage” or “anytime”, in c/kWh.

On your bill as “supply charge” or “daily charge”, in c/day.

What your retailer pays for solar you export (“feed-in tariff”), from your bill or plan. Enter 0 if you have none.

Do the rates you typed include GST?

Many bills print each rate WITHOUT GST and add GST in its own column (look for a “GST” column next to “Amount”). Choose that option and we add 10% to the usage and supply rates — never to the feed-in rate, which has no GST.

PlaceNest assumptions in use — change in Customise: Usage pattern: Most use in the late afternoon and evening · Heating and cooling: No big seasonal change.

2. Your estimated results

Fill in the quick estimate and press Calculate. Your estimate appears here — it stays in this browser.

3. Customise — detailed settings (optional)

Every setting below already has a value the estimate can use. Open a section to check it against your bill, quote or data sheet — anything you type replaces the PlaceNest assumption or modelling default.

Electricity tariff details (time-of-use times)

Only needed for a time-of-use tariff: choose “Time of use” in the quick estimate, then set your peak, shoulder and off-peak times here. Your usage, supply and feed-in rates and the GST question are in the quick estimate.

Usage pattern
When and how you use electricity changes how much solar or stored energy you use yourself.

This picks an estimated daily pattern. Your real pattern changes how much solar you use yourself. Left on the PlaceNest assumption, we use “most use in the late afternoon and evening”.

Electric heating or air-conditioning shifts use between seasons. Left on the PlaceNest assumption, we use “no big seasonal change”.

e.g. 15 if you'll add electric heating, −10 if you're cutting back. 0 means no change.

Your car & charging habits

Only if an electrician told you a lower limit.

Wall to car battery. PlaceNest modelling default 90%.

Shows what charging only at cheaper times would cost on your tariff.

Charging from your solar

Adds a “charge from spare solar first” comparison.

Government incentives & finance

PlaceNest hasn't verified any current government incentives yet, so none are listed here and none are taken off any PlaceNest estimate. Programs change often: check the official government source, and ask your installer what is already included in the quote.

How PlaceNest checks incentives

Is it likely to suit your home?

It may be worthwhile when

  • You drive a long way most days and a power point cannot keep up.
  • You have off-street parking with a practical cable route to the switchboard.
  • You want scheduled or solar-following charging.
  • Several drivers or vehicles share one parking spot.

It may not be worthwhile when

  • Your daily driving is short and an existing power point (checked by an electrician) recharges the car overnight.
  • Your car's on-board charger accepts only a low AC rate, so a high-rated charger would add cost without faster charging.
  • You rent or live in a strata building and cannot get approval.
  • You mostly charge at work or at public chargers.

Common misconceptions

Myth: A 22 kW charger will charge my car at 22 kW.
Reality: Only if your home has a suitable three-phase supply and your car's on-board charger accepts that rate. Many cars accept a lower AC rate, and most homes are single-phase.
Myth: I must install a wall charger to own an EV.
Reality: Many owners manage with a standard power point. An electrician should check the circuit is suitable for long charging sessions.
Myth: Charging at home always costs the same.
Reality: The cost depends on your plan and the time of day, and on whether spare solar covers part of it.
Myth: Solar will always cover my EV charging.
Reality: Only charging that happens while spare solar is available is covered by it; overnight charging uses grid or battery electricity.

Checklists

Before you buy

  1. Step 1: Check your car's maximum AC charging rate (on-board charger) and whether it supports three-phase AC.
  2. Step 2: Find out whether your home has single-phase or three-phase supply.
  3. Step 3: Estimate your typical daily driving to decide whether a power point would be enough.
  4. Step 4: Decide whether you want scheduling, solar-following or load management features.
  5. Step 5: Get a site inspection and a written quote from a licensed electrician that covers switchboard work and cabling.
  6. Step 6: For strata, get body corporate approval before buying equipment.
  7. Step 7: Compare warranties and how the charger's app and data are handled.

At installation

  1. Step 1: A licensed electrician installs the charger on a suitable dedicated circuit with the required protection devices.
  2. Step 2: Any supply upgrade or network notification is arranged where required.
  3. Step 3: The charger's maximum current is set to suit your supply and any load management.
  4. Step 4: You receive a certificate of electrical safety or compliance and warranty documents.
  5. Step 5: The installer shows you how to use scheduling or solar charging, if included.

Safety

Frequently asked questions

How long does it take to charge at home?

Roughly the energy you need (kWh) divided by the charging rate (kW), plus some losses. The charging rate is the lowest of the charger rating, your supply and the car's on-board charger. Charging also slows as the battery gets close to full.

Do I need three-phase power?

No. Most home chargers run on single-phase supply. Three-phase only helps if your charger and your car both support three-phase AC charging.

Can I charge from my solar panels?

Yes, while spare solar is available. A solar-aware charger can adjust to match it. Charging overnight uses grid electricity or a home battery.

How does my electricity plan affect charging costs?

On a time-of-use plan, the time you charge changes the price of each kWh, so charging in an off-peak window or from spare solar usually costs less than charging at peak times. A demand tariff can also charge for the highest power drawn in a set window, so avoid charging at full rate in that window. Check your own plan's details.

What about apartments?

Strata buildings usually need body corporate approval, a plan for the building's electrical capacity and a way to bill each user. The energy.gov.au guide covers strata options.

Can my EV power my home?

Some cars and chargers support bidirectional charging, but it needs compatible equipment and approvals. Check what your car, charger and network allow before relying on it.

Related topics

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Sources and review

Draft — pending human review

Not yet reviewed by a person. Programs, products and rules change — check the official source before you decide.

General information only. PlaceNest's energy guides, and any estimates or incentive lists, are general information and estimates — not personalised financial advice, and not a quote. Programs, prices and rules change: check the official sources, and get written quotes from accredited installers before you decide.

PlaceNest guides are general information, not financial advice. Whether solar, a battery or an EV charger pays off depends on your home, usage and prices.

Any incentive or finance details PlaceNest shows come from a reviewed list, each with its official source and the date it was checked; eligibility is decided by each program. See how incentives work and paying for an upgrade.