Astronergy ASTRO Solar Panel 450Wp – Full Black Bifacial Glass/Glass

The Astronergy ASTRO N7s is a full black bifacial glass-glass solar panel of 450 Wp with n-type TOPCon 4.0 cells and an efficiency of 22.5%. The frame, cells and rear glass are black, so the panel blends into the roof. Because the rear side also captures light, on a light or reflective surface it yields more than the 450 Wp on the front.

What you use it for

At 1762 × 1134 mm (less than 2 m²) and 21.5 kg, this is a manageable size for pitched roofs, flat roofs and carports. The bifacial yield comes into its own best on a flat roof with gravel or white roofing membrane, or with an open structure where light passes underneath the panel. According to the datasheet, the power rises to 495 W at 10% rear-side gain and to 540 W at 20%.

What makes it special

• n-type TOPCon 4.0 cells with ZBB-TF: without busbars, with a conductive film, for an even black surface.
• Glass-glass (1.6 + 1.6 mm) with black anodised aluminium frame; load capacity up to 5,400 Pa front and 2,400 Pa rear.
• Low degradation: a maximum of 1.0% in the first year and 0.4% per year after that; at least 87.4% after 30 years.
• Temperature coefficient Pmpp of -0.29%/°C.
• IP68 junction box, three bypass diodes, system voltage up to 1,500 V.

Warranty and installation

The manufacturer provides a 30-year linear performance warranty and a product warranty that is reinsured with a Tier 1 insurer. The 4 mm² cables have a length of 350 mm (+) and 250 mm (-). Mounting is done with universal clamps on a suitable mounting system, such as Esdec ClickFit EVO or Solarstell Connect.