Solar EV Charging in Perth: Filling Up from Your Roof
Solar EV charging is about the cheapest motoring there is, filling your car from your own roof instead of buying power. With Perth’s sunshine, solar EV charging turns surplus generation into kilometres. Here is how it works, what you need, and how to get the most from it.
Why charge from solar?
If you export surplus solar to the grid, you get a modest feed-in payment for it. Using that same power to charge your car instead is worth far more, because you avoid buying petrol or grid electricity. That gap is the whole appeal of solar EV charging for a household with panels.
6 things to know about solar EV charging
- It uses surplus solar that would otherwise be exported
- A smart charger can do it automatically
- Daytime charging is the key, when the sun is up
- It works best if the car is home during the day
- Your system size affects how fast you can charge
- A battery lets you charge from solar at night
Timing is everything
Solar EV charging only works when the sun is shining, so the car has to be home during the day, or charged on weekends. For people who work from home, drive locally, or have a second car, that is easy. For a car that commutes daily, off-peak overnight charging may suit better.
Smart chargers do the work
The neat way to do solar EV charging is a smart charger that watches your solar export and diverts the surplus into the car automatically, ramping up when a cloud passes and down again after. You set it and forget it, and the car quietly fills with power you were giving away.
System size matters
How fast solar EV charging goes depends on how much surplus you have. A larger system with plenty of spare generation charges faster than a small one that is mostly covering the house. It does not need to be fast, though, a slow trickle across a sunny day still adds real range.
Batteries and night charging
A home battery lets you store the day’s solar and charge the car at night from it, which suits people whose car is away all day. It adds cost, but it extends solar EV charging beyond daylight hours and helps with outages too, if the battery has a backup gateway.
Mixing solar and off-peak
You do not have to choose. Many people set the charger to use solar when it is available and fall back to off-peak overnight when it is not. That combination keeps the cost per kilometre very low year-round, whatever the weather or your schedule happens to be doing.
No rebate, but real savings
There is no WA rebate for a home charger, so the economics come from the running cost, not a handout. That is exactly where solar shines: power you generate yourself is the cheapest electricity you will ever put in a car, and it costs nothing extra once the panels are there.
How much range per sunny day?
Even a modest surplus adds up over several hours of sun, comfortably covering typical daily driving for most people. You rarely need a full charge; topping up from solar across the week is usually enough to keep the car ready without ever buying grid power for it.
Check your switchboard first
A charger is a heavy dedicated load, so the board needs the capacity and a spare way for the circuit. An electrician checks this before the install, which avoids surprises and makes sure the charger, the solar and the rest of the house all work together happily.
Why use a licensed electrician
Setting up solar EV charging means a properly installed charger on the right circuit, configured to work with your solar. A licensed electrician installs and sets it up correctly. The Western Power outages and network page covers the network side.
Want solar EV charging at your Perth home?
ACS Electrical installs and configures smart chargers across the metro. Explore our EV charger installation service, cost to charge an EV guide or EV charging time guide. Call 0419 967 838.
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