The Ameresco Solar 405M is a compact 4.5-watt, 12V monocrystalline solar panel engineered for long-lasting off-grid use in remote and hazardous environments. Built for Class I, Division 2 applications, the 405M offers a low-profile design, corrosion-resistant frame, and 15-foot factory-attached cable for reliable and flexible installation. Ideal for low-power industrial and monitoring systems, this module is proven in harsh climates ranging from the Arctic to the desert.
Key Features:
- 4.5W monocrystalline panel for 12V systems
- Certified for Class I, Division 2 hazardous locations
- Factory-sealed Lo-Pro junction box with 15 ft. AWG 18-2 cable
- High-transmission tempered glass and polyester backsheet
- Multimount frame with anti-rotation channel groove
Ideal Applications:
- Oil & gas field monitoring
- Low-power sensors and data loggers
- Security and environmental control systems
- SCADA, RTU, and telemetry support
- Battery maintenance in remote systems
Electrical Specifications:
| Electrical Characteristics |
| Maximum Power (Pmax) |
4.5W (STC), 3.2W (NOCT) |
| Voltage at Pmax (Vmpp) |
16.5V (STC), 14.7V (NOCT) |
| Current at Pmax (Impp) |
0.27A (STC), 0.22A (NOCT) |
| Open Circuit Voltage (Voc) |
20.5V (STC), 18.7V (NOCT) |
| Short Circuit Current (Isc) |
0.30A (STC), 0.24A (NOCT) |
| Module Efficiency |
6.7% |
| Efficiency @ 200W/m² |
<5% reduction (6.3%) |
| Nominal Voltage |
12V |
| Power Tolerance |
±10% |
| Max System Voltage |
50V |
| Max Series Fuse Rating |
1A |
| Limiting Reverse Current |
0.30A |
| Temp. Coefficient (Pmax) |
-0.45%/°C |
| Temp. Coefficient (Voc) |
-0.360%/°C |
| Temp. Coefficient (Isc) |
+0.105%/°C |
| NMOT |
47 ±2°C |
Mechanical Specifications:
| Mechanical Data |
| Dimensions |
251 x 269 x 23 mm (9.9 x 10.6 x 0.9 in) |
| Weight |
0.8 kg (1.7 lbs) |
| Solar Cells |
36 monocrystalline cut cells in series |
| Front Cover |
3.2 mm high-transmission tempered glass |
| Backsheet |
White polyester |
| Frame |
Silver anodized aluminum multimount |
| Junction Box |
Lo-Pro, fully sealed with 15 ft. AWG 18-2 cable (red +, black -) |
Certifications:
- UL 1703, ULC ORD-C1703 (Intertek ETL Listed)
- FM 3611 / CSA C22.2 No. 213-M1987
- Class I, Division 2, Groups A, B, C, D certified
- ISO 9001 certified manufacturing
Warranty:
- 2-year warranty on materials and workmanship
- 12-year 90% minimum power output guarantee
- Optional 25-year performance warranty available
