Photovoltaic panels directly embedded in the roof

In-roof solar panels, also known as integrated solar panels, are solar panels that are installed directly into the roof structure instead of being mounted on top. They replace the roofing material itself and sit flush with the roofline, providing a seamless aesthetic that traditional solar panels do not.

Figure 1. Fully integrated photovoltaic (PV) roof “RIS.” The solutions that have been proven fall into the following categories: Interlocking panel systems, which either use panels that mimic roofing tiles with the photovoltaic (PV) element embedded in the surface or have a frame bonded to the PV panel which provides the sealing interlock.

Rather than being installed on the roof surface, in-roof solar panels are integrated into the roof itself, replacing roof tiles, while standard panels are mounted on brackets fixed between the roof tiles. The installation of in-roof solar panels involves removing roof tiles and installing weatherproof flashing to ensure a watertight seal.

When comparing in-roof solar panels to standard on-roof panels, one of the key differences lies in the installation process. Rather than being installed on the roof surface, in-roof solar panels are integrated into the roof itself, replacing roof tiles, while standard panels are mounted on brackets fixed between the roof tiles.

But solar technologies include much more than just rooftop panels, and building-integrated photovoltaics, also known as BIPV, takes the panel off the roof and, for example, puts it inside the roof itself.

In-roof solar panels are a neat, streamlined alternative to frame-mounted panels. Some people love the look of conventional frame-mounted solar PV panels, but others find them too big, bulky and heavy. Solar roof tiles are a beautiful alternative, but they're expensive and lack efficiency.