Charging Your EV with Solar: The Complete Australian Guide

This is the first question everyone asks, and the answer is more manageable than you might think. For a detailed walkthrough with exact panel counts, see our solar EV charging sizing guide.

The average Australian drives about 40km per day. Most modern EVs consume around 15-20 kWh per 100km, which means your daily driving needs roughly 6-8 kWh of electricity.

To generate that much power on an average day, you need approximately 1.5-2 kW of additional solar capacity on top of what you are already using for the house. In practical terms, that is 4-5 extra panels.

But here is the thing: most people do not charge their EV every single day. If you are commuting 40km daily, you might only need to charge 3-4 times per week. On sunny weekends when the car is parked at home, you can top up the battery from surplus solar while using minimal household power.

The key to maximising free EV charging is timing. You want your car to charge when solar production exceeds household consumption - typically late morning through mid-afternoon.

There are several ways to achieve this, from simple to sophisticated.

Not all EV chargers are created equal when it comes to working with solar. Here are the standout options for Australian homes.

Let us do the maths on what you are actually saving.

Here is where it gets really interesting. What if your car is not home during the day when the sun is shining?

If you have got a home battery, you can charge it during the day with excess solar, then use that stored energy to charge your EV when you get home in the evening.

It is not quite as efficient as direct solar-to-EV charging (you lose a bit in the battery charge/discharge cycle), but it is still way cheaper than grid power and gives you the flexibility to charge whenever suits you.

Whether you have already got solar or you are starting fresh, here is how to approach the solar + EV setup.

Combining solar with an EV is not just about saving money (though the savings are substantial). If you are still wondering whether solar is worth it in Australia, adding an EV to the equation makes the case even stronger. It is about energy independence, generating your own fuel from your own roof, insulated from both petrol price spikes and electricity rate increases.

The technology is mature, the economics work, and the installers know how to set it up properly. If you want to brush up on the basics first, our guide to understanding solar covers how panels, inverters, and batteries work together. The only question is whether you are ready to stop paying for fuel.

If you are not sure where to start, take our rebate eligibility quiz to see what incentives you qualify for on solar, batteries, and EV chargers. Then get matched with local installers who can design a system tailored to your needs.