How to Install Solar Panels on a Flat Roof?

Solar panels are an excellent investment, as they not only help reduce energy costs but also reduce the carbon footprint of a building. Installing solar panels on a flat roof may seem like a daunting task, but with proper planning and guidance, it can be a relatively straightforward process.

In this blog post, our step-by-step guide on how to install solar panels on a flat roof will help you take the first step towards harnessing the power of the sun.

Free Blue Solar Panel Board

Steps To Install Solar Panels on a Flat Roof

With advances in technology and the availability of solar panel systems, it has become easier than ever to have solar panels installed on a flat roof. However, the process can still be complex and intimidating for those unfamiliar with the installation process.

Whether you are a homeowner or business owner, this guide will help you take the necessary steps to begin using renewable energy by installing a solar power system.

Step 1: Planning

The first aspect of this step involves assessing the roof’s suitability for solar installations. It is important to determine whether the flat roof has the ability to support the weight of the panels along with the weighted mounting system and whether the roof slope is at an appropriate angle and orientation to receive as much sunlight.

If you have a steep roof, alternative locations or angled mounts, or tilted solar panels may be necessary.

The next step is to determine the energy needs and the number of panels required by analysing the energy consumption of the building and estimating the amount of solar energy power generation required to offset this usage.

The number of solar panels needed will depend on factors such as the available roof space and the desired level of energy production.

Finally, obtaining necessary permits and approvals is crucial before a solar panel installation to ensure compliance with local regulations and safety standards.

Free Top View Photo of Solar Panels

Step 2: Installing the Mounting System

Mounting systems secure solar panel systems to flat roofs. There are several types of mounting systems available, including ballasted, penetrating, and non-penetrating options.

The first step is to choose the right system for your solar panel system based on the type of roof and panel orientation.

A ballast system uses weights to hold the panels in place, while penetration mount systems attach the panels directly to the roof structure. Systems with non-roof penetrations use clamps to attach the panels without damaging the roof.

Then install rails and brackets onto the roof. The rails are used to connect solar panels together and to attach them to the brackets for flat roof systems. Brackets are then secured to the roof by drilling multiple holes for bolts, screws, or adhesive.

Step 3: Wiring Flat Roof Solar Panels

The first step in wiring the flat solar panels is to install a combiner box. This box serves as a central point for the wiring and allows the flat solar panels to be connected in parallel. The box also includes a circuit breaker or a fuse to protect the solar system from overcurrent or short circuits.

Next, wires are connected to the positive and negative terminals of each installed flat roof solar panel, which are then routed to the combiner box. The wires must be sized appropriately to handle the current and voltage of the solar panel system.

The wires are then routed to the inverter, which is responsible for converting the direct current (DC) produced by the flat solar panels into alternating current (AC) that can be used by the building. The inverter is usually installed near the electrical panel of the building.

Finally, the wiring is connected to the electrical panel of the building.

Free A Person in Black Shirt Holding a Solar Panel while Standing on the Roof

Step 4: Final Inspections and Testing

This is a critical step that ensures that the solar power system is safe, functional, and meets all necessary regulations and standards.

The final inspections and testing may involve checking the wiring and connections for any faults, verifying the proper functioning of the inverter and other equipment, and conducting a test of the overall performance of the solar power system.

Get Experts to Install Solar Panels on Your Flat Roof

Installing solar panels is complex, so why do it? Leave it up to the experts here at Symons Energy to handle all kinds of solar installations.

We specialise in renewable energy solutions, including solar panel installations. Our high-quality solar systems are tailored to the specific needs of each customer. Here at Symons Energy, we offer a range of services, including the installation, maintenance, and repair of solar PV systems.

If you are thinking of having solar panels installed on a flat roof or sloped roof, then give us a call now. Get in touch here!


Q1: What do solar installation costs typically include?

Ans: Solar installation costs in Australia typically include the cost of the solar panels, the mounting systems, the inverter, the wiring, and the installation labour.

The cost of solar panels varies depending on factors such as the type of panel, the brand, and the size of the system.

Q2: Will installing solar panels on a flat roof damage it?

Ans: If installed correctly by a professional, installing solar panels should not damage a flat roof. The mounting system used for laying flat solar panels on the roof should be designed to protect it from any potential damage.

Q3: Does installing solar panels on a flat roof take long?

Ans: The duration of solar panel installation on a flat roof can vary depending on the size of the solar panel system and the complexity of the installation. On average, it can take anywhere from one to three days to complete the installation.

Q4: What maintenance is required for solar panels on a flat roof?

Ans: Solar panels generally require minimal maintenance, but annual cleaning is recommended to ensure optimal system performance. The panels should be cleaned with a soft brush or cloth and warm water to remove dirt, debris, or bird droppings.

Author : Kosta Symons

Published Date : April, 29 2023

At Symons, we only install panels and batteries we know you will love. Get to learn more about installing solar panels in our blog. Read More.