If you want the highest efficiency from your solar panels, you can’t just about place them wherever there’s space. It takes careful analysis to determine the best location on your roof to maximize energy production, minimize shading, and ensure long-term performance and safety. Of course, the best way to ensure this is to let a professional solar installer assess these factors to find the perfect installation spot. Here's how they do it.
Sun Exposure and Orientation
The first and most important factor is how much sunlight each part of the roof receives. In the northern hemisphere, south-facing roof sections get the most consistent sunlight throughout the day and year. East- and west-facing areas can also work well, depending on your energy needs and the roof’s slope. Installers use tools like solar pathfinders or software to track the sun's movement and determine which sections get the most exposure.
Roof Pitch and Tilt Angle
The pitch of the roof (its steepness) also plays a role. Ideally, solar panels should be angled to match your location’s latitude for the most energy production, though most roofs don’t require big tilt adjustments unless the pitch is very shallow or extremely steep. In many cases, panels can be mounted flush to the roof if the slope is within a standard range.
Shading from Trees and Structures
Shading from trees, chimneys, or neighboring buildings can greatly reduce solar output. Installers perform a shading analysis, often using drones, satellite imagery, or design software, to pinpoint the areas of your roof that are being shaded from anything near your home. Even small amounts of shade on one panel can affect an entire string, so minimizing this is critical.
Reviewing Roof Condition and Material
Solar panels last 25 years or more, so the condition of the roof is essential. Installers check for damage or wear in shingles, flashing, or underlayment. Some roof materials—like asphalt shingles—are easier and cheaper to work with than others, like clay tile or slate. If a part of the roof is in poor condition or made of a fragile material, installers may choose a different location or recommend roof repairs first.
Space and System Layout
The shape and size of each side of your roof affects how many panels can be installed there. A large, uninterrupted surface is ideal for laying out panels efficiently. Installers use design software to create a layout that fits the space, avoids obstacles like vents and skylights, and adheres to fire codes and safety setbacks.
By analyzing all of these factors, solar installers can determine the most effective and safest location on your roof for solar panels. They can also tell you how many panels you can fit on your roof, and if there are any other factors impacting installation that will also affect the Phono Solar panels’ cost.
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