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Brand range: 255W–450W
Monocrystalline
Wuxi Suntech Power Co., Ltd STP305S-20/Wfm
Max Power
305W
Efficiency
18.83%
Operating V
32.8V
Warranty
25Y
Technical Specifications
| Open Circuit Voltage (Voc) | 39.8V |
| Short Circuit Current (Isc) | 9.8A |
| Voltage at Pmax (Vmp) | 32.8V |
| Current at Pmax (Imp) | 9.3A |
| Temp. Coefficient of Pmax | -0.443%/°C |
| Dimensions | 1635 x 991 x 35 mm |
| Weight | 20.3kg |
| NOCT | 43.6°C |
| PTC Rating | 286.3W |
📋 Data verified: June 2026
📄 Specs based on STC (1000 W/m², 25°C, AM 1.5)
🏷️ 128 Wuxi Suntech Power Co., Ltd models in database
FAQ
What is the max power output of the Wuxi Suntech Power Co., Ltd STP305S-20/Wfm?
The Wuxi Suntech Power Co., Ltd STP305S-20/Wfm is rated at 305W under STC (1000 W/m², 25°C, AM 1.5).
How long is the warranty for the Wuxi Suntech Power Co., Ltd STP305S-20/Wfm?
The STP305S-20/Wfm comes with a 25-year product warranty covering defects and degradation.
How efficient is the Wuxi Suntech Power Co., Ltd STP305S-20/Wfm?
This panel has 18.83% efficiency, which is standard for commercial solar panels.
What are the dimensions and weight of the Wuxi Suntech Power Co., Ltd STP305S-20/Wfm?
It measures 1635 x 991 x 35 mm and weighs 20.3kg.
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📊 Brand Context
Wuxi Suntech Power Co., Ltd offers 128 solar panel models from 255W to 450W.
Browse all Wuxi Suntech Power Co., Ltd models →