420 W Monocrystalline Solar Panel - Black (High-Efficiency)

Get maximum power per square meter with this 420 W monocrystalline solar panel in black design . The panel is ideal for boats, campers, off-grid installations and fixed solar systems where high performance, reliability and a stylish appearance are important.

With modern, highly efficient cells, the panel delivers stable power production – even under changing light conditions – and is suitable for both 12 V, 24 V and larger solar systems via the correct charge controller.

☀️ High performance and efficiency

• Power: 420 W

• Cell type: Monocrystalline (high efficiency)

• Good performance even in diffuse light and low sun altitude

• Perfect for charging battery banks, lithium batteries and off-grid systems

⚓ Suitable for boats & mobile installations

The panel has a robust aluminum frame and tempered glass, which makes it resistant to wind, moisture and vibrations - ideal for maritime environments as well as driving in campers and vans.

📦 Technical specifications

• Power: 420 W

• Color: Black (full black look)

• Weight: approximately 20.8 kg

• Dimensions: approx. 1722 × 1134 × 30 mm

• Frame: Aluminum

• Glass: Tempered safety glass

• Lifespan: Designed for many years of stable operation

🔌 Usage

✔ Boating and sailing
✔ Motorhome and campervan
✔ Off-grid system
✔ Summer house and country installations
✔ Backup and energy solutions

💡 Benefits

• High power per panel – fewer panels, more power

• Monocrystalline technology for better efficiency

• Robust construction for outdoor use

• Elegant black design

• Compatible with modern MPPT charge controllers

🔧 Tip from SejlStrøm:
For optimal use, we recommend an MPPT charge controller , correct cabling and solid mounting - especially when used on a boat or vehicle.