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How do tilt racks help in solar panel installation on a flat roof?

Flat roofs are more commonly seen on buildings occupied by commercial establishments than residences. However, the fundamental principles of solar panel installation on a flat terrace are the same, whether it is for residential or commercial solar. A solar panel installation on a flat roof can be successfully accomplished without any complexity however it will require some extra equipment like tilt racks that will add to the total cost opposed to a regular installation on an inclined roof. Nevertheless, a solar panel installation on a flat rooftop will still be a great investment. In this article, we shall see how tilt racks help in a solar panel installation on a flat roof.

Mounting at optimum tilt angle for solar panels in Australia

There are two kinds of tilt racks that can be deployed to mount panels on a flat or low-sloped roof – ballasted tilt racks and penetrative tilt racks.  Penetrative tilt racks are fixed by penetrating and screwing to the roof whereas ballasted racking system utilizes weights to keep the modules in place. With both penetrative and ballasted tilt racks, modules can be inclined to the optimum tilt angle for solar panels in Australia which is between 10 and 30 degrees, to achieve maximum energy production. Tilt racks help solar panels accomplish maximum solar generation without much power loss.

Panel spacing for optimizing output

Shadows are longest during the cold months therefore solar module tilt racks are correctly spaced to avoid shading each other. However, during summer months this spacing can be undone and solar panel tilt racks placed closer to avoid any loss of sunlight which may otherwise fall between the panel row spaces.

Freedom for best panel orientation

In Australia, facing solar panels to the north helps them yield maximum overall power output. But a flat roof allows freedom to face the panels in any direction you want for maximizing solar gains. If your power usage is highest in the morning time, you can mount your panels facing east. And if you consume most amount of energy post noon time, you can place them facing west. If not for a specific reason, it is always advisable to keep your panels facing north for maximum overall generation.

Keep the building cooler

Solar panels keep the roof cooler as they act like a cover that protects the roof surface from direct sunlight and its heat. Tilt racks help keep the roof cooler all the more as they enhance the airflow between the panel’s backside and the roof surface to let the heat generated by the panels escape. This helps in lowering the internal temperature of the building and reduces the air-conditioning costs too. Additionally, panels mounted on tilt racks don’t heat as much too, which enhances their efficiency especially during hot months.


Tilt racks are a great way to achieve benefits from a solar panel installation when your roof is either flat or low-sloped. While it does add a little extra to the initial cost of your solar panel installation, but that does not compare to the massive savings and other benefits that solar will bring as soon as you install. Commercial solar projects are large in size and capacity, but can be installed without any difficulty on flat roofs by making use of tilt racks.

Do contact Solar Power Nation for the best solar deals in Australia, a variety of solar services, and professional solar panel installations by CEC-accredited solar panel installers.

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