How important is the orientation and angle of the roof?

Many people mistakenly believe that they cannot install solar panels on their roof for various reasons, be it the material, its location, the shading or the dimensions of the roof.

The truth is that there are many factors that make a roof more or less suitable, but while some qualities of the roof make it impossible to install, others have minimal impact on the investment of a solar photovoltaic panel system. .

Today we are going to review two roof factors that influence solar panel performance: orientation and slope.

Contents

Orientation of the roof.

Roof orientation is one of the main factors that determines how much sun your solar panels will see throughout the day.

In the northern hemisphere, solar panels are most efficient when installed on south-facing roofs. In the southern hemisphere, they face north. However, even if your roof doesn’t face directly south, they can still produce a lot of electricity. Many people install solar panels on east and west facing roofs (and save money doing it!)

Tip: Not sure about the direction of your roof? Find your address on Google Maps. Its grid indicates the direction of the south: compare it to the direction of your roof on the satellite images.

Why is roof orientation important?

Solar panels facing directly east or west typically produce 20% less electricity than those facing south. That doesn’t mean you won’t save money, but if you plan to cover all your electricity usage with solar power, you may need to install a few more panels than with a south-facing system. .

Although it is technically possible to install solar panels on the north side of your roof, it is not the best place for solar production (in fact, it is the worst): you will probably have to use a special mounting so that the panels oppose the slope of the roof your roof to generate electricity. This means that they will not be flush with the roof and produce relatively little electricity. If the only option is a north-facing roof, other installation options should be considered, such as a solar installation on the ground or in a garage.

Can’t install solar panels on your roof? Consider community solar power.

Community solar power allows you to support renewable energy generation and save money on your electricity bills without installing any equipment on your property.

Roof height.

Ideally, a fixed roof mounted solar power system should have an angle equal to the latitude of where it is installed.

However, tilt angles between 30 and 45 degrees will work well in most situations. Fortunately, the angle of your roof has less of an impact on solar panel production than the direction the roof faces.

Why are angles important for solar power generation?

Like other factors that affect production, the impact of the small solar productivity loss related to roof pitch depends on electricity prices in your local market.

No matter where you live or the slope of your roof, solar power installations can save you a lot of money.

Optimal electricity production occurs when the solar panels are facing south with an inclination equal to 30°. However, even if you lower the pitch of your roof to just 5°, production only drops by about 10%.

The bottom line is that even if your solar panels aren’t at the perfect angle, they can still deliver great performance.

Start saving with solar energy.

Remember, you don’t have to live in the sunniest part of your country or have a directly south-facing roof to take advantage of solar power: the most important factor in determining your energy savings. solar energy is the price you pay for electricity.

By switching to solar energy, electricity costs from the electric company are reduced or even eliminated, so even if you cannot get the most out of your photovoltaic installation, investing in solar energy can be very profitable.

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