Thin Solar Flat Plate Collector
1. Slim but Strong Structure
2. High-Density Polyurethane Insulation
3. Proprietary Blue-Selective Coating
4. Bonding Heat Transfer Technology
The Ultra-Thin Flat Plate Solar Panel by Soletks Solar redefines how solar water heating systems integrate into modern architecture. More than just a high-performance solar thermal collector, it’s a design statement — merging sleek aesthetics with unmatched efficiency. With only 50 mm in thickness, it lies flush against the rooftop, creating a clean and sophisticated silhouette that blends perfectly with any building style.
Whether installed on a villa overlooking the Mediterranean, a boutique hotel in Southeast Asia, or a school in Africa, this ultra-thin solar water heater panel delivers powerful, zero-carbon hot water without compromising design. It’s the choice for homeowners, architects, and project developers who demand performance, reliability, and beauty.
Aesthetics Meets Engineering
Minimalist Profile
The ultra-slim 50 mm thickness ensures the panel becomes part of the building, not a bulky add-on. Unlike traditional collectors that protrude awkwardly, this design creates seamless integration.
Color Customization
While the standard finish is matte black, you can select any RAL color to match your building façade, with ΔE color deviation under 1.5. This allows architects and designers to maintain consistent aesthetics without sacrificing thermal performance.
Lightweight for Easier Installation
Requiring only two installers instead of three, the panel reduces labor costs and speeds up project timelines. For multi-unit installations, such as hotels or schools, this efficiency translates into significant savings.
Performance Without Compromise
Despite its sleek profile, this flat plate solar thermal panel incorporates advanced materials and manufacturing:
· High-Density Insulation: One-piece polyurethane foam (35 kg/m³) with λ = 0.023 W/(m·K), closed-cell rate ≥ 97%.
· Selective Blue Coating: In-house developed absorber with 95% ± 2% solar absorptance and 4% ± 2% emittance, verified under AM1.5 conditions.
· Bonding Heat Transfer: Seamless copper-to-aluminum joining for 15% higher efficiency.
· Durability: Survives 2,000 thermal cycles from –30°C to 120°C without cracking.
Designed for Global Projects
This panel is an ideal solution for residential solar hot water systems in Europe and North America, where homeowners value both performance and curb appeal. In the Middle East and Africa, it meets the demand for large-scale commercial solar hot water projects that require durability in extreme climates. In Southeast Asia, it suits hotels, resorts, and institutional buildings aiming for green certification.
Use Cases:
· Luxury Homes & Villas: Architectural harmony with high-efficiency solar heating.
· Hotels & Resorts: Reliable hot water with reduced operational costs.
· Educational Institutions: Sustainable water heating for dormitories and cafeterias.
· Healthcare Facilities: Constant hot water supply for patient care.
Why It Appeals to Architects & Developers
· Sleek integration enhances property value
· Color-matching capability for unique designs
· Lower shipping costs with up to 400 units per 40HQ container
· Proven durability and low maintenance
Performance Advantages Over Traditional Collectors
Feature | Traditional Collector | Ultra-Thin Collector | Benefit |
Thickness | 80 mm | 50 mm | Lower freight costs, improved aesthetics |
Shipping Capacity (40HQ) | 270 units | 400 units | 48% transportation cost savings |
Installation Labor | 3 workers | 2 workers | Reduced labor cost |
Aperture Area | 1.87 m² | 1.9 m² | Slightly higher heat capture |
Heat Loss Coefficient | Higher | ≤ 0.35 W/(m²·K) | Better winter performance |
Architectural Impact | Bulky rooftop protrusion | Flush installation | Modern, integrated look |
Technical Specifications：
Coating | Dimensions (mm) | Aperture Area (m²) | Working Pressure (MPa) | Connector Size | Number of Connectors | Frame / Color |
Blue Film | 2021×1021×50 | 1.9 | 0.6 | G1/2 Internal Thread | 4 | Aluminum Profile S10 / Metallic Gray |
Why Choose Soletks Solar：
· Global Reach: Exported to 68 countries with over 1.2 GW installed capacity.
· Strong Warranty: 10 years for core components + 25 years linear performance guarantee.
· Expert Support: 24/7 technical service hotline with multilingual assistance.
· Customization: Optional RAL color customization to match building façades with a ΔE color difference of less than 1.5.
Real-World Q&A
Q: Will such a thin collector lose heat too quickly in winter?
A: No. The high-density polyurethane insulation ensures heat loss coefficient ≤ 0.35 W/(m²·K), outperforming thicker traditional models. Even in –10°C, the system can deliver 45°C hot water.
Q: How much can I save on transportation?
A: For every 1,000 units, you can save up to 48% in freight costs due to the higher container load capacity.
Q: Can I choose a custom frame color?
A: Yes. In addition to the standard matte black, you can select any RAL color for perfect architectural integration.
