Helios Solar Works 250 Watt Mono Solar Panel

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6T 250WW
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49.80 LBS
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2 units
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Helios 420 Watt Solar Panel

Helios Solar 6T 250WW - 250 Watt Mono Solar Panel (Silver Frame | Black Back Sheet and Frame)

Pallet Quantity (25 Solar Panels)


Helios Solar Works manufactures high-performance crystalline solar modules for solar electric systems. They use only high-quality components and an advanced, automated manufacturing platform to offer modules that deliver higher efficiency, lower installation costs, and a smaller system footprint.

Helios Solar Works is headquartered in Milwaukee, Wisconsin. They manufacture the modules using materials sourced from regional and U.S. suppliers whenever possible.

  • High-performance solar modules offering higher efficiency, lower installation costs
  • 60 high-quality poly-crystalline cells per module
  • Tested to UL 1703 and CEC with a Class C fire rating
  • 25-year linear performance warranty
  • Manufactured end-to-end in Milwaukee, Wisconsin (USA) using Helios Solar Works advanced, automated platform
  • IEC 61215, IEC 61730, ULC/ORD-C1703-01, CEC, FSEC, TUV, CE
  • 25 year linear performance warranty, 10 years workmanship.


Electrical Data STC
Rated Power PMPP (W) 250
MPP Voltage (V) 30.30
MPP Current (A) 8.22
Open Circuit Voltage (V) 37.40
Short Circuit Current (A) 8.72

Measured at (STC) Standard Test Conditions 25°C, insolation 1,000 W/m², AM 1.5.

Electrical Data NOCT
Rated Power PMPP (W) 183
MPP Voltage (V) 27.30
MPP Current (A) 6.70
Open Circuit Voltage (V) 34.50
Short Circuit Current (A) 7.25

Nominal Operating Cell Temperature (NOCT) values are typical values, 45°C.
Typical cell temperature: insolation 800W/m², ambient temperature 20°C, wind speed 1m/s.

Other Electrical Parameters
System Voltage (V) 600/1,000
Temp. Coefficient ISC (% / °C) 0.03
Temp. Coefficient PMPP (% / °C) -0.41
Temp. Coefficient UOC (% / °C) -0.32
Module Temperature -40°C to +80°C
Performance Output
-0/+3 percent


Cells 60 mono-crystalline, 3 bus bar
Cell Dimensions 156 mm x 156 mm, pseudo-square
Front glass 4mm solar glass, highly transparent and anti-reflective
Encapsulation EVA - Solar Cells - EVA
Backside Multilayer sheet
Frame Anodized aluminum (clear or black)
Connection 2 x 1.2 m solar cables with MC4 connectors or compatible
Bypass Diodes 3 pieces
Back Sheet Options
Black, White, Clear


Dimension 1,680 mm x 990 mm
(66.14” x 38.98”)
Area 1.66 m² (17.87 Sq Ft)
Thickness 40 mm (1.58”)
Weight 22.59 kg (49.8 lbs)



Specifications are subject to change without prior notice.



Helios Solar Works stands behind their modules with a generous linear performance warranty. They guarantee each module will provide:

• No less than 97 percent of nominal power output for the 1st year
• No less than 80 percent of nominal power output at year 25
• A year-by-year degredation of no more than 0.7%