If you already have solar, adding a battery and a home EV charger doesn’t just add convenience, it changes the maths on all three. A 7kW home charger typically costs $1,000 to $4,000 fully installed in Australia, and on its own it saves you the gap between public fast-charging and a standard powerpoint. But it’s the combination with solar and a battery that turns EV charging into effectively free fuel: home charging at Victoria’s average electricity rate runs to roughly 5 cents per kilometre, charging from your own stored solar can push that closer to 0 cents, while public DC fast-charging costs 2 to 3 times more than either. The order you add these three things in matters more than most guides let on.
If you’ve already read our ROI guide on home batteries, you’ll know the “6:1 Value Gap” between what you earn exporting solar and what you pay buying it back at night. An EV charger is the single biggest thing in most homes that can be shifted onto that stored, self-generated power instead of the grid, which is exactly why the two upgrades compound rather than just add up.
Does a Home EV Charger Actually Pay for Itself?
Yes, but the payback comes from what you stop paying for, not from the charger itself.
A home charger has no revenue of its own; the return comes from the difference between public fast-charging prices, standard grid electricity, and free (or near-free) solar power. Charging at home in Victoria at an average residential rate works out to roughly 5 cents per kilometre for a typical EV, against public DC fast-charging rates that run high enough to cost two to three times as much per kilometre for the same trip. Over 15,000km a year, that gap alone is worth several hundred dollars, before solar or a battery are even in the picture. The charger is the enabler of that saving, not the source of it, which is why it makes sense to price it as part of a system rather than a standalone purchase.
Installed cost is the other half of the payback equation. A straightforward single-phase 7kW charger, mounted close to the switchboard with no electrical upgrades needed, typically lands at the lower end, around $1,000 to $2,500. Longer cable runs, an older switchboard, or a three-phase unit push that up, with three-phase 11kW – 22kW installs commonly running $2,500 to $4,500. Anyone quoting a flat price without having seen your switchboard is guessing, and the gap usually turns up later as an invoice surprise.
AC vs DC Charging: Which Do I Actually Need?
Most homes only need AC charging; DC is faster and unlocks more of the battery’s capability, but it comes at a real cost premium.
A standard AC home charger (7kW single-phase, or up to 22kW three-phase) is more than enough to fully charge most EVs overnight, and it’s the standard, cost-effective choice for the vast majority of installs. DC charging is a different proposition: the Sigenergy DC EV charging module we install, for example, delivers up to 25kW directly from solar, battery, or grid, blended in real time, adding roughly 150km of range per hour of charging, and supports vehicle-to-home backup so the car’s battery can help power the house in an outage. That capability is genuinely useful for households charging daily or wanting outage backup, but it’s a meaningfully bigger spend than a standard AC unit and isn’t necessary for a household charging overnight on a normal commute. If a quote has jumped straight to DC without asking about your actual daily driving pattern, that’s worth questioning.
How Much of My EV Charging Can Solar Actually Cover?
It depends on when you drive and when you charge, not just on your system size.
A car plugged in during the middle of the day, while panels are generating, can often be charged almost entirely from solar with very little drawn from the grid. The problem is that most people plug in when they get home in the evening, well after solar generation has dropped off, which means without a battery, that charging session comes straight from the grid at peak rates regardless of how much solar the house generated earlier that day. This is the gap a battery is built to close.
It’s also worth knowing that Victoria’s minimum feed-in tariff was scrapped from 1 July 2025, according to RACV, so retailers now set their own solar export rates rather than working to a government floor. That makes the case for self-consuming your own solar, whether through EV charging or battery storage, stronger than it was when a guaranteed minimum export rate was in place.
Where Does the Battery Actually Fit In?
The battery is what turns daytime solar into night-time EV charging.
Without storage, solar and EV charging rarely overlap for most working households, the sun is up while the car’s at work, and the car’s plugged in while the sun’s down. A correctly sized battery captures the solar generated during the day and releases it in the evening, which is exactly when most home charging happens. For guidance on getting the sizing right rather than a generic estimate, see our guide on which battery is actually best for a solar system, the same sizing logic applies whether you’re covering an evening at home or an evening at home plus an EV.
Is Off-Peak Grid Charging Cheaper Than Solar and Battery Charging?
Off-peak grid rates are cheap, but stored solar is usually cheaper still, and it’s not exposed to future tariff changes.
Rolling an EV onto a cheap off-peak plan is a genuine option and shouldn’t be dismissed. Some retailers offer overnight EV-specific tariffs around 18c/kWh, which brings the cost of home charging down to roughly 3 cents per kilometre, cheaper again than the 5 cents per kilometre you’d expect on a standard flat rate. But that rate is set by your retailer and can move. For comparison, public DC fast-charging typically runs 45 – 65c/kWh, which is why it lands at two to three times the cost per kilometre of any form of home charging, off-peak or otherwise.
Power drawn from your own battery, charged by your own panels, has effectively no ongoing cost once the system’s paid off, and it isn’t affected by whatever your retailer decides to do with off-peak pricing next year. The right answer for most homes is a mix: solar-direct where the timing lines up, battery-stored where it doesn’t, and off-peak grid as the fallback for the rare high-use day.
What About Rebates for EV Chargers Specifically?
There’s currently no dedicated Victorian or federal rebate for home EV charger hardware itself, unlike solar panels and batteries.
This is worth knowing upfront so nobody’s surprised by it. Victoria’s EV purchase subsidy ended back in June 2023, and according to RACV, the only current state-level EV incentive is a $100 rego rebate at renewal, nothing charger-specific. The incentives that meaningfully apply to your system are still on the solar and battery side.
Our current Victorian solar and battery rebate guide covers what’s actually available right now, and our rebates and incentives page breaks down eligibility. The financial case for the charger comes from the running cost savings outlined above, not from an upfront incentive.
So, What Actually Pays for Itself First?
Based on how these systems are actually used day to day: the battery is usually the fastest payback on its own, the charger’s payback depends entirely on whether it’s fed by solar and battery or by grid power at full price, and the three together outperform any one of them in isolation.
Buying all three at once isn’t necessary to get this benefit; a household with solar and battery already installed can add a charger later and immediately start drawing on stored power. What matters more than the order is making sure the system as a whole, inverter, battery, and charger, is sized and configured to actually shift EV charging into the hours when you’re running on your own power, not the grid’s.
FAQ
Does an EV charger increase my solar export or feed-in tariff?
No, a home charger draws power, it doesn’t generate or export it. Its financial benefit comes from reduced running costs, not from any change to your feed-in arrangement.
Can I add an EV charger to an existing solar and battery system?
In most cases yes, provided the inverter and battery have the capacity and compatibility to support it. Some newer battery platforms, including the Sigenergy SigenStor range we install, support native DC EV charging directly from stored solar power. See our product range for what’s currently compatible.
Do I need a bigger battery if I’m charging an EV at home?
Only if you’re charging most nights and want that charging covered by stored solar rather than the grid. Sizing should be based on your actual overnight and EV charging load together, not a generic household estimate, the same principle covered in our battery sizing guide.
Is DC EV charging worth the extra cost?
For most single-EV households, no, AC charging overnight is fast enough and considerably cheaper to install. DC becomes worth considering for multi-vehicle households or very short charging windows.
How Sunrise Innovations Approaches This
We’re a Clean Energy Council accredited, New Energy Tech Approved Seller, and an approved AlphaESS installer, recognised as a Top 20 Battery Installer in Victoria. When we scope an EV charger alongside solar and battery, we size the whole system against your actual driving and charging pattern, not a generic household estimate, and we tell you plainly where a DC charger is worth the extra cost and where it isn’t.
Calculate your own potential savings, or get a tailored quote that accounts for your EV alongside your solar and battery setup.