Uni-Solar PVL-128 128W 24V Flexible Amorphous Solar Panel UL 1703 600VDC

Uni-Solar PVL-128 128W 24V Flexible Amorphous Solar Panel UL 1703 600VDC

The Uni-Solar PVL-128 is a 128-watt flexible amorphous thin-film solar laminate designed to bond directly to membrane and metal roofing surfaces without penetrations or mounting hardware. Manufactured by United Solar Ovonic, the PVL-128 uses triple-junction amorphous silicon cells encapsulated in a durable ETFE polymer film with an ethylene propylene copolymer adhesive backing. This unit comes with bottom-facing 4-inch output wires (positive red, negative black) for direct wiring.

Specifications & What's Included

• Model: Uni-Solar PVL-128 | Part No.: AA5-3851-02
• Maximum Power (Pmax): 128 W (STC)
• Nominal Operating Voltage: 24 V
• Max Power Voltage (Vmpp): 33.0 V
• Max Power Current (Impp): 3.88 A
• Open Circuit Voltage (Voc): 47.6 V
• Short Circuit Current (Isc): 4.8 A
• Maximum Series Fuse Rating: 8 A
• NOCT Power: 100 W @ 30.8 V / 3.24 A
• NOCT Open Circuit Voltage: 43.5 V | NOCT Isc: 3.9 A | NOCT: 46°C
• Cell Type: Triple-junction amorphous silicon, 356 mm × 239 mm per cell
• Panel Dimensions: 5486 mm × 394 mm × 4 mm (216" × 15.5" × 0.2") / 18 ft long
• Encapsulation: Durable ETFE high light-transmissive polymer
• Adhesive: Ethylene propylene copolymer with microbial inhibitor
• By-pass Diodes: Connected across every solar cell
• Output Cables: 4 mm² (12 AWG), 560 mm (22") length, weatherproof DC-rated quick-connect terminals
• UL Listing: UL 1703 — for use in systems up to 600 VDC
• Fire Rating: Class A Max. Slope 2:12 / Class B Max. Slope 3:12 / Class C Unlimited Slope
• IEC 61646 v1 certified; IEC 61646 v2 and IEC 61730 TUV certification pending (at time of manufacture)
• Installation Temperature Range: -10°C to 40°C (50°F to 100°F)
• Maximum Roof Temperature: 85°C (185°F)
• Roof Slope Range: Minimum 5:8:12 (3°), Maximum 21:12 (60°)
• Compatible Substrates: EPDM, TPO, PVDF-coated (Galvalume or Zincalume) steel metal roofing — flat surface without pencil beads or decorative stippling, minimum 406 mm (16") width
• Included: Panel with 4-inch bottom-facing output wires (positive red, negative black); junction box not included

Applications

The PVL-128 is designed specifically for commercial and residential low-slope roofing applications where conventional framed panels cannot be used. The adhesive backing bonds directly to EPDM, TPO, and metal (Galvalume/Zincalume) roofing membranes, making it a standard choice for building-integrated photovoltaics (BIPV) on flat and low-pitch commercial roofs. Because it is UL 1703 listed for systems up to 600 VDC, the PVL-128 is compatible with grid-tied inverter systems and can be wired in series strings with other PVL-series panels. The bypass diode on each cell limits shading losses to the output of the single shaded cell — typically less than 4.5% per shaded cell — making it well-suited for rooftops with potential obstructions. The thin-film amorphous silicon technology also provides better low-light and high-temperature performance relative to crystalline silicon panels, which is an advantage on rooftops exposed to high ambient temperatures or diffuse light conditions. The PVL series was widely used by professional roofing contractors and solar installers on commercial re-roofing projects through the 2000s and 2010s, and remains in demand for retrofit installations and replacement panels on existing PVL arrays.