About Rail-less Mounted Solar Work
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This more of a low profile mounting method. Systems typically use multiple attachment points on the rooftop and attach to each panel individually, eliminating the need for rails.
The Pros of Rail-less Solar:
Sleeker, less noticeable design
Offered with flashing that helps blend the system in with the roof and keep rodents/weather out
Less weight on rooftop means it may be more compatible with older/less engineered buildings
Wires are contained beneath the array and hidden from view
The Cons of Rail-less Solar:
Limited to darker module types which are typically more expensive and not as highly rated in kW
Wires and conduit must be run through the rooftop, leaving no option for conduit across the rooftop or down the side of the building
Less common and newer products may mean a higher risk of problems during the install or long-term as well as the presence of fewer experienced installers
There are fewer product manufacturers versus rail mounted system. Starwinsolar is one of the famous brand.
Summary:
Overall, rail-less solar offers a low profile solar system for the visually conscious customer. With no rails and flashing along the edges, installation is clean and less noticeable from the street, with a little less customization than what's available for rail mounted systems.
