Charge an EV at Home With Solar & a Battery (2026)

You bought the EV to stop paying for petrol. Then the first power bill landed and the savings looked thinner than the brochure promised. Here’s the fix most people miss: charge the car off your own roof, not the grid. With solar and a home battery, a typical commute costs close to nothing to drive — you’re filling the car with sunshine you’d otherwise have exported for 5 to 8 cents.

The short version. A standard EV does about 40 km a day on the average Aussie commute, which works out to roughly 2,500 kWh of charging a year. Pull that from the grid on a peak tariff and it’s real money. Pull it from a 6.6 kW solar system and a Fox ESS battery and most of it is free power you already paid for once.

How do you charge an EV off solar at home?

Three ways, and they stack. First, charge during the day while the panels are working — the cleanest, cheapest electron is the one going straight from your roof into the car. Second, store the midday surplus in a battery and tip it into the car at night. Third, where the charger supports it, set “solar-aware” charging so the car only draws power when there’s genuine excess solar, not when a cloud rolls over and the house starts pulling from the grid.

Most of our customers can’t sit at home charging at noon — they’re at work, and so is the car. That’s exactly where a Fox ESS battery earns its keep. The panels fill the battery through the 10am–3pm window, and at 7pm the car charges off stored solar instead of 30 to 50 cent grid power. On a Morphett Vale job last spring we did precisely this: 6.6 kW on the roof, a 21 kWh Fox ESS, and a 7 kW charger in the garage. The owner’s two EVs now run almost entirely on daytime sun caught and held until evening.

AC vs 3-phase: which home charger do you actually need?

Home chargers split into two camps, and the right one comes down to your switchboard and how fast you need the car full.

Here’s the honest truth we tell people at the quote: a 7 kW single-phase charger is plenty for the overwhelming majority of homes. Forty km of range an hour means even a near-empty battery is full by morning. The 11 and 22 kW units only make sense if your home is already wired for three-phase power and you’re either running two cars or genuinely need a fast turnaround. Don’t pay for 22 kW to charge a car that sleeps in the garage for ten hours a night.

We’re brand-neutral on the charger itself. There are several solid, OCPP-compatible units on the market, and we’ll fit the one that matches your car, your phases and your budget, not the one with the biggest margin. Whichever you choose, we want it to talk to your solar so it can prioritise free power. The Clean Energy Council is a good neutral starting point if you want to read up before we visit.

What does a typical commute actually cost to charge?

Let’s run the numbers on that 40 km a day. Over a year that’s about 2,500 kWh of charging.

• Charging from grid peak (~$0.40/kWh): around $1,000 a year.
• Charging from your own solar: close to $0 — it’s power you generated and would otherwise export for 5–8c.
• Charging off a battery at night: still effectively solar power, just time-shifted to when you’re home.

That gap is the whole argument. Every kWh you send to the car off your roof is a kWh you didn’t buy back at peak and didn’t give away at the feed-in rate. For a household driving an EV daily, that’s often the single biggest reason the battery maths suddenly works — we cover the broader case in our all-electric home guide. Figures vary with your driving, tariff and roof, so we confirm your exact numbers at the quote.

How much does it cost to install a home EV charger?

A typical single-phase 7 kW charger, supplied and installed, lands in the ballpark of $1,500 to $2,500 depending on the unit and how far the cable runs from your switchboard to where the car parks. Three-phase units cost more, both for the hardware and because they need three-phase supply at the board. A long cable run, a switchboard upgrade or a meter change can move the figure, which is why we go through your setup with you properly before quoting rather than guessing. You’ll get one fixed price with no surprises on the day.

If you’re putting solar, a battery and a charger in together, do them as one job. The electrician’s already there, the switchboard’s open, and a properly integrated setup charges smarter than three things bolted on separately. See what we fit on our EV chargers page, or pair it with solar and a battery.

Do you need a battery to charge an EV with solar?

No — but it changes who benefits. If you work from home or the car’s parked through the day, you can charge straight off the panels with no battery at all and pay almost nothing. If the car’s gone by 8am and back at 6pm, the sun’s setting just as you plug in, so without storage you’re charging from the grid. The battery bridges that gap: it banks the midday solar and hands it to the car at night. For most working households with a commute, that’s the difference between an EV that runs on sunshine and one that runs on a peak tariff.

Want your car running on sunshine?

Send us your postcode, your car, and roughly how far you drive, and we’ll size the solar, battery and charger that turns your daily commute into nearly-free kilometres — including an honest payback figure and the bits we’d talk you out of. Grab a free quote and we’ll map it out for your home.