The Symphony Plus is a Hetero Junction Technology (HJT) photovoltaic panel with very high efficiency. The Symphony Plus is a larger solar panel, it has larger cells and higher output than the Symphony.

The PhaseLux Symphony is designed specifically for situations where diffused light or shadows are more likely to strike the PV arrays. The panels have an elegant, almost black appearance and are larger than the Symphony, making them also suitable for larger systems on flat roofs, for example.

In these glass-glass solar panels, the high-efficiency HJT solar cells are sandwiched between two layers of glass. The double glass layer in glass-glass solar panels offers many advantages such as higher performance and better quality and warranty.

The advantages of glass-glass solar panels:

  • Resistant to extreme weather, such as heavy hailstorms.
  • 27% higher power output
  • Up to 350% longer warranty and the best warranty conditions
  • Certified fire safety
  • The risk of micro-cracks is almost zero
  • High-end design
  • Exceptionally long service life of many decades
  • All-risk insurance free and transferable, after registering with PhaseLux.


Due to the special Hetero Junction Technology (HJT), this panel achieves a higher output per m2, especially at lower light incidence. For example, at sunrise, sunset and in cloudy conditions.

Two different materials are used in an HJT cell: crystalline and amorphous silicon. As a result, they achieve higher performance than cells using traditional PERC technology. HJT thin-film technology has been on the market since 1980, but was initially applied only in some forms. It was not until 2010 that it began to be used in conjunction with crystalline cells.

This methodology is now so refined that it can compete with technologies available on the market, reaching 210 and more Wp/m².


Dimension: 1134 x 1722 x 30 mm. Power 440 Wp. Efficiency per m² 225 Wp.
Glass-glass panel 2 x 1.6 mm, with anti-reflective and anti-soiling coating on the outside.
High quality POE films in front and behind the cells, known for their anti-reflective properties and long resistance to moisture exposure.
HJT bi-facial cells in half-cut design to keep the voltage loss in the cells low and thus increase the power.
Application of bypass diodes in triple design to avoid hot spots in the panels.

Stäubli MC4 connectors according to European standard.

Now we technically have the panel already functional and resistant to weathering, etc..

To enable mounting on the roof, the panel is still provided with a 30 mm black anodized frame all around (for a glass-foil panel this is 35 or 40 mm). This narrow frame makes a PhaseLux panel look more aesthetically pleasing on your roof.