Which Direction Should Solar Panels Face in Australia?

In Australia, solar panels should face north to generate the most power over the whole day. But north is not always the best choice for your hip pocket. If you use most of your electricity in the evening and have no battery, west-facing panels often save you more. And if you have a battery, direction matters far less, because you store the daytime sun and use it whenever you like.

Here is how to work out the right answer for your roof, your household and your budget.

What is the best direction for solar panels in Australia?

Australia sits in the southern hemisphere, so the sun tracks across the northern half of the sky. A north-facing array catches sun from morning to evening and produces the highest total output over a year. That is why north is the textbook answer, and why it is still the right call for many homes.

The trade-off is timing. North-facing panels peak around the middle of the day, when a lot of people are out of the house. If you are not home to use that power, much of it flows back to the grid instead of into your appliances.

A unit of solar you use yourself is worth far more than one you export. Facing your panels to match when you actually use power is often more valuable than chasing maximum total output.

North vs west: which is right for your home?

The best direction depends less on physics and more on your daily routine. Ask yourself when your home uses the most electricity.

• Home during the day (retired, work from home, young family): north usually wins. You are there to use the midday peak as it happens.
• Out all day, home in the evening: west-facing panels shift generation later into the afternoon and early evening, so more of your solar lands when you switch on the aircon, oven and lights.
• Early risers with big morning loads: a touch of east can help capture that early sun.
• No strong pattern or you want the most total power: north remains the safe default.

West-facing panels produce a little less over the year than north-facing ones, but that lost output can be more than repaid by the extra power you use yourself rather than export. Learn more about full systems on our solar panels page.

Are east-west split panels worth considering?

Splitting an array so some panels face east and some face west is increasingly popular. Instead of one sharp peak at midday, you get a broader, flatter output curve: a morning bump from the east and an afternoon bump from the west.

That flatter shape often matches how a real household uses power far better than a single midday spike. It can also let you fit more panels on a roof that has no good north face. The catch is that peak output is lower, so an east-west split suits self-consumption more than it suits maximising export.

Does a battery change the best direction for solar panels?

Yes, and this is the big one. A battery stores the solar you generate during the day so you can use it at night. Once you can time-shift your own power, the question of when your panels peak becomes much less important.

With a battery, you can lean back towards north-facing panels to capture the most total energy, then store the surplus for the evening instead of exporting it. In practice that means you get the best of both worlds: high generation and high self-consumption. If you are weighing up storage, our solar battery page walks through how it works, and you can see the numbers on our solar battery buyers guide.

Rule of thumb: no battery, match your panels to your usage times. With a battery, chase generation and let storage handle the timing.

What about roof tilt and shading?

Direction is only part of the story. Two other factors decide how much power you actually get.

Tilt angle

Most Australian roofs sit at a pitch that works well enough for solar, so panels are usually mounted flush to the roof. A tilt roughly equal to your latitude captures the most across the year, but the gains from perfecting tilt are small compared with getting direction and shading right. A completely flat roof may need tilt frames so water and dirt run off.

Shading

Shade is the silent killer of solar output. A tree, chimney, aerial or neighbouring wall that shades panels for part of the day can cost you more than facing slightly the wrong way. A good installer maps the shade across the day and the seasons before deciding on layout, and can use panel-level electronics to limit the damage where some shading is unavoidable.

How does panel direction apply in Adelaide and South Australia?

South Australia has strong sunshine and high electricity prices, which makes self-consumption especially valuable. Because grid power costs a lot here, using your own solar rather than buying from the grid is where the real savings sit.

For many SA homes that are empty during the day, a west-leaning or east-west array, or a north-facing system paired with a battery, captures more value than pure north alone. The right mix depends on your roof and your habits, which is exactly what a proper site assessment is for. See how we work across Adelaide, and for anything to do with export rates, incentives or finance, check our rebates and finance page, which we keep current, as those change over time and vary by state.

The bottom line on solar panel direction

North gives you the most total power. West gives you more power in the evening when many households need it. East-west spreads output across the day. And a battery lets you stop worrying about direction and simply store what you make. There is no single best answer for every home, only the best answer for yours.

Frequently asked questions

Which direction should solar panels face in Australia?

For the most total power over the year, solar panels should face north in Australia, because the sun tracks across the northern sky. However, west-facing panels can save you more if you use most of your power in the evening and do not have a battery. The best direction depends on when your household actually uses electricity.

Are west-facing solar panels a bad idea?

No. West-facing panels produce slightly less total energy than north-facing ones, but they generate more in the late afternoon and early evening. For homes that are empty during the day and busy at night, that timing often means you use more of your own solar and save more overall.

Does having a battery change which way my panels should face?

Yes. A battery stores your daytime solar for use at night, so the timing of generation matters far less. With a battery you can lean towards north-facing panels to maximise total output, then store the surplus instead of exporting it, capturing both high generation and high self-consumption.

Is an east-west split better than north-facing panels?

It depends on your goal. North-facing panels produce the most total energy with a midday peak. An east-west split produces a bit less overall but spreads output across morning and afternoon, which often matches household usage better and suits self-consumption. It can also help when your roof has no good north face.

Does roof tilt matter as much as direction?

Direction and shading matter more than tilt for most homes. A tilt roughly equal to your latitude is ideal, but the gains from perfecting it are small. Most Australian roofs are pitched well enough that panels are mounted flush, while a flat roof may need tilt frames so it drains and self-cleans.