What are shingled solar modules？
Stacked modules may be the furthest limit of crystalline silicon solar development. By eliminating the need for a double-junction process, stacked modules are the highest power and efficiency silicon product available in conventional undoped crystals.
Tile modules cut solar cells into strips and overlap them within the frame module. This eliminates gaps between cells and more silicon cells can be packed into a single module, resulting in higher output power and module efficiency.
Advantages of shingled solar panels?
- Higher power per square metre - Stacked solar cells do not require a bus bar across the top of the cell, therefore more of the solar cell is exposed to the sun and therefore more energy can be produced from the solar panel area.
- Increased Shade Tolerance - Conventional solar panels have individual cells connected in series, so when a portion of the solar panel is shaded, it can have a significant impact on power output levels. By configuring solar cells in shingles, they can be grouped and configured in parallel, thus significantly reducing the losses caused by shading.
- Better Mechanical Properties - Static and dynamic load tests have shown that the shingle method is more resistant to failures due to external forces applied to the solar panel than conventional solar panels. In addition, the conductive adhesive used on the stacked shingle cells helps reduce internal stresses due to thermal expansion.
- Unique Visual Appearance - Stacked shingle solar panels have no visible circuitry, which gives them a clean and simple appearance that provides superior street appeal.
How do shingled solar panel compare to traditional panels?
Conventional solar panels use different numbers of solar cells depending on the desired output of the panel. The solar cells are distributed throughout the panel with space between the cells. They are electrically connected together by a high-temperature welding process using copper busbars.
The more copper busbars used, the less resistance loss there is and therefore the more efficient the electrical connection. This is one of the reasons why many solar panel manufacturers increase the number of busbars. However, more busbars covering the cells means fewer solar cells are exposed to sunlight, which reduces the output of the cells.
Since stacked cells are connected differently than traditional solar panels, busbars are not needed and cells can be connected together so that there are no gaps between cells.
Stacked solar modules can also be wired differently than conventional solar panels. Typically, the solar cells in a conventional solar panel are wired in a series of strings, whereas the solar cells in a stacked panel can be wired in a parallel configuration.