What Makes SunSteel™ Panels Different?
Exposed racking systems and surface-mounted solar panels often detract from a building’s design and create long-term maintenance concerns. SunSteel™ panels eliminate those tradeoffs by integrating premium solar panels directly into the Double-Lok™ roof system.
Why SunSteel™ for Your Next Roof? One system. One crew. One timeline.
SunSteel™ panels arrive with solar panels preapplied to each Double-Lok™ roofing panel, turning solar and roofing into a single trade, factory assembled solution. That means fewer parts to coordinate on site, streamlined scheduling, and a cleaner finish.
- Low-profile architectural integration
- Preserves clean rooflines; no racking required
- Compatible with sustainable programs
- Generates clean, renewable power
- Enhances building value and energy independence
- Reduce complexity: Fewer trades and components to manage on site.
- Confidence in design: Array loading is integrated into building design from the outset.
- Modern, low profile look: Frameless PV panels blend into the roofline.
- Simplified O&M: Reduced parts count helps lower ongoing maintenance.
Built for Commercial & Industrial Projects
SunSteel™ panels are optimized for low-rise commercial and industrial buildings, from warehouses and manufacturing to retail sites, logistics hubs, and institutional facilities.
✔ Retail & Commercial: Improve sustainability credentials and reduce operating costs with a clean aesthetic.
✔ Government & Institutional: Support ESG goals and renewable mandates using an integrated, code-aligned approach.
✔ Manufacturing & Industrial: Offset daytime loads with onsite energy generation while preserving durable roof performance.
ROI & Sustainability
Generate onsite electricity to reduce utility exposure and support long-term total cost of ownership.
✔ ESG & compliance: Support corporate sustainability goals and green building pathways with a single, integrated solution.
✔ Future ready design: Factory-integrated assembly and standardized components help streamline lifecycle planning.
✔ Total cost of ownership: Combine the longevity and low maintenance of metal roofing with integrated solar to support long-term financial performance.
How It Works
Available Through Our Trusted Brands
The SunSteel™ integrated Double-Lok™ system is available through Cornerstone Building Brands and its portfolio:
1. Consultation & Feasibility
We review project goals, roof geometry, structural capacity, and energy targets to determine suitability.
2. Design Integration
Solar array loading is aligned with the building design to help address codes and structural requirements.
3. Factory Integration
Solar panels are pre-applied to the Double-Lok™ metal roofing panels for consistent, repeatable quality.
4. Single Trade Installation
One crew installs roof and solar together, simplifying coordination and helping compress schedules.
5. Commissioning & Handover
Streamlined O&M with reduced parts and a clean, low-profile finish.
SunSteel™ vs. Traditional Rooftop Solar
| Consideration | SunSteel™ Integrated with Double-Lok™ | Traditional Rack-Mounted Solar |
|---|---|---|
| Installation | Single-trade workflow; roof + solar together | Separate trades; roof first, solar later |
| Structural | Loading integrated into building design | Array loading often assessed post-roof |
| Aesthetics | Low-profile, frameless appearance | Higher visual profile above roof plane |
| Penetrations | Reduced hardware and penetrations | More mounting hardware and penetrations |
| Consistency | Factory-assembled components | More site variability and field assembly |
| O&M | Fewer parts to inspect and service | More hardware and interfaces to maintain |
Frequently Asked Questions
How is a SunSteel™ panel different from traditional rooftop solar?
A SunSteel™ panel features factory-integrated solar technology with Double-Lok™ standing seam panels, allowing roof and solar to be installed by one crew in a single workflow. This integrated approach reduces onsite complexity, parts, and penetrations, while aligning array loading with the building design.
Which buildings are best suited?
Low-rise commercial and industrial buildings with appropriate roof orientation, clear spans, and structural capacity are ideal. We’ll help evaluate roof geometry, loading, and energy goals during the design phase.
What about maintenance?
The integrated design reduces parts and penetrations, which simplifies inspections and routine upkeep. The frameless PV approach supports efficient cleaning.
Who manufactures the solar panels?
SunSteel™ solar panels are manufactured by AUO Corporation and are sold by Cornerstone Building Brands only as part of the preinstalled, factory-integrated panel system on Double-Lok™ metal roofing panels.
What certifications and warranties apply?
Certifications include IEC/EN 61215, IEC/EN 61730, UL 61730-1/2. The system includes a 10-year product warranty and a 20-year linear power output guarantee to ≥91.4% by year 20. See product documentation for full terms.
Can SunSteel™ panels support sustainability and ESG goals?
Yes—integrated onsite energy generation helps reduce operational emissions and supports corporate sustainability objectives. Specific green building program contributions depend on project scope and documentation.
Ready to Plan Your Project?
Our project services team provides sales support, design guidance, and installation
planning to move you confidently from concept to commissioning.
Disclaimers & Notes
SunSteel™ is a registered trademark of AUO Corporation. SunSteel™ solar panels are manufactured solely by AUO Corporation and are sold by Cornerstone Building Brands only as part of a panel system preinstalled on Double-Lok™ metal roofing panels. Cornerstone Building Brands makes no representations or warranties regarding solar panel performance and shall not be held liable for solar output or efficiency. All warranties, terms, and conditions applicable to the integrated system, including coverage related to solar panels, are defined in the specific product warranty documentation.