≥ 8
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
MPN No: ALEX-400-B-54-S
Expected ship date Jun 20 - 27
In Stock
139.60
-28%
$99.99
Sale
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
Regular price
$139.60
-28%
$99.99
$0.24/watt
28% OFF
248 IN STOCK
Sale
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
Available
MPN No: ALEX-400-B-54-S
Regular price
$139.60
-28%
$99.99
$0.24/watt
Expected ship date Jun 20 - 27
Ships from U.S. Warehouse
Trusted by Thousands
Expert U.S. Support
We offer multiple secure payment options for your convenience
We offer multiple secure payment options for your convenience
Data Sheet
Regular price
$139.60
-28%
$99.99
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
MPN No:
ALEX-400-B-54-S
Expected ship date Jun 20 - 27
Sale
≥ 8
Alexus Solar 400W Black on Black 108 Half-Cell Mono Solar Panel ALEX-400-B-54-S
Built with proven PERC cell technology and a clean full-black finish, the Alexus Solar 400W module delivers reliable residential performance with strong efficiency and long-term durability.
Designed as part of the Alexus 108 Series, this panel balances output, aesthetics, and cost—making it a solid choice for rooftop systems where both performance and appearance matter.
Key Benefits
- 400W output ideal for residential system sizing
- Full black module design for a clean, uniform roofline
- Up to 21.0% module efficiency for strong energy production
- Lower temperature coefficient for better performance in heat
- PID-resistant design for long-term reliability
- Excellent durability with high wind (2400 Pa) and snow load (5400 Pa) ratings
- Resistant to salt mist, ammonia, dust, and harsh environments
Typical Applications
- Residential rooftop solar systems
- Grid-tied home energy systems
- Small commercial installations
- Projects requiring clean aesthetics (HOA-sensitive installs)
- Harsh or coastal environments
Why This Panel Works
This Alexus Solar module uses monocrystalline PERC half-cell technology, which improves efficiency and reduces internal resistance—leading to better real-world performance, especially under partial shading.
The full-black design gives you a more refined install visually, while the panel’s lower temperature coefficient (-0.34%/°C) helps maintain output in hotter climates where standard modules can lose efficiency .
On the durability side, the panel is built to handle tough conditions—tested against salt mist, ammonia, dust, and mechanical loads—making it a dependable option across a wide range of environments.
Specifications
| Specification | Value |
|---|---|
| Model | ALEX-400-B-54-S |
| Rated Power (Pmax) | 400W |
| Cell Type | Monocrystalline PERC |
| Cell Configuration | 108 Half-Cell |
| Module Efficiency | 20.5% |
| Voltage at Max Power (Vmp) | 31.18V |
| Current at Max Power (Imp) | 12.83A |
| Open Circuit Voltage (Voc) | 37.21V |
| Short Circuit Current (Isc) | 13.67A |
| Dimensions (L x W x H) | 67.8 x 44.6 x 1.2 inches |
| Weight | 46.3 lbs |
| Glass | 3.2 mm fully tempered glass |
| Junction Box | IP68, 3 bypass diodes |
| Max System Voltage | 1500V DC |
| Max Series Fuse Rating | 25A |
| Operating Temp Range | -40°F to 185°F equivalent (-40°C to +85°C) |
Certifications
- UL 61730 / ETL / CEC listed
- IEC 61215, IEC 61730
- PID, Salt Mist, Ammonia, Dust & Sand tested
- Fire Type 1 rating
Warranty
- 25-Year Product Warranty
- 25-Year Linear Performance Warranty with strong degradation curve
About Alexus Solar
Alexus Solar is a U.S.-based solar brand focused on delivering high-performance modules backed by rigorous testing standards and modern manufacturing practices. With a focus on durability, efficiency, and real-world reliability, Alexus panels are designed to perform across residential and commercial applications.
