Which Roof Direction Is Best for Solar Panels?

If you’re researching solar, you’ve probably heard that a north-facing roof is the best option.

While there’s truth to that, it doesn’t tell the whole story.

The best roof direction for solar panels depends on where your home is located, how you use electricity and the characteristics of your property. Roof direction is an important consideration, but it is only one part of the overall picture.

Quick Summary

In New Zealand:

• North-facing roofs generally receive the most direct sunlight throughout the year.
• East and west-facing roofs can also be suitable for solar.
• South-facing roofs may receive less direct sunlight than other orientations.
• Roof direction should always be considered alongside roof space, shading and household electricity use. If you’re assessing whether your property is suitable overall, our guide to Is Your Home Suitable for Solar? looks at each of these factors in more detail.

A roof does not need to face perfectly north to be worth considering for solar.

Why roof direction matters

Solar panels generate electricity when exposed to sunlight.

The direction a roof faces influences how much sunlight it typically receives throughout the day and across the seasons.

In New Zealand, north-facing roof areas generally receive the greatest amount of direct sunlight over the course of a year. This is why north-facing roofs are often considered the preferred option.

However, that does not mean other roof directions should be ruled out.

East and west-facing roofs

Many homes have roofs that face east, west or a combination of both.

These roof orientations can still be suitable for solar, particularly when considered alongside a household’s electricity usage patterns.

For example, some households use more electricity in the morning, while others have greater demand later in the afternoon or evening.

Rather than focusing solely on compass direction, it is often more useful to consider how the roof and household work together.

What about south-facing roofs?

South-facing roof areas generally receive less direct sunlight than north-facing roofs.

That doesn’t automatically mean they cannot be used, but it does mean they are usually assessed differently as part of the overall system design.

Every property is unique, which is why roof direction is considered alongside several other factors rather than in isolation.

Roof direction isn’t everything

One of the biggest misconceptions about solar is that roof direction determines whether a home is suitable.

In reality, other factors can be just as important.

A north-facing roof with significant shading may present different opportunities from an east-facing roof that receives uninterrupted sunlight throughout the day.

Roof size, available space, shading, household electricity usage and future energy plans all contribute to the bigger picture. Shading can sometimes have a greater influence than roof orientation alone. Learn more in our article How Shading Affects Solar Performance.

 

The importance of a complete assessment

Looking at your roof on a map or using a compass can provide a useful starting point, but it rarely tells the whole story.

A proper assessment considers how sunlight reaches the roof and whether nearby trees or buildings create shade. It’s also worth understanding how much electricity your household uses before exploring solar options. Our guide on How to Estimate Your Household Energy Use Before Going Solar explains where to start.

Taken together, these factors provide a much clearer understanding than roof direction alone.

Final Thoughts

Roof direction is an important part of planning a solar system, but it should never be viewed in isolation.

North-facing roofs often provide favourable conditions in New Zealand, yet many homes with east or west-facing roofs are also suitable for solar.

Rather than asking whether your roof points in the “right” direction, a better question is whether your property as a whole is suitable. Roof orientation, shading, available roof space and your household’s energy use all work together to shape the answer. If you’re ready to explore the wider considerations, our article What to Consider Before Installing Solar Panels brings all of these factors together in one practical guide.

Frequently Asked Questions

Does my roof have to face north?

No. North-facing roofs are often considered ideal in New Zealand, but east and west-facing roofs can also be suitable depending on the property and household.

Are east-facing solar panels worthwhile?

East-facing roofs may still be suitable for solar. Every property should be assessed individually.

Is a west-facing roof suitable for solar?

It can be. Roof direction is only one factor considered when assessing a property for solar.

Can I install solar on a south-facing roof?

South-facing roofs generally receive less direct sunlight, but they should not be assessed on roof direction alone.