84.36 kW L-Foot Solar Roof Mounting Project in Thailand
A commercial metal-roof PV mounting reference designed around 228 landscape modules, aluminum rails and mechanically fixed roof attachments. The project documentation defines multiple short array groups so the solar layout can follow an irregular roof plan and work around roof obstructions.
Documented Design Inputs
The project files provide both the roof-array planning and mounting-system configuration. Commercial quotation values and customer-identifying information are intentionally excluded from this public case page.
Array Groups Adapted to an Irregular Roof Plan
Instead of forcing one continuous rail table across the building, the layout is divided into several module-group lengths. This allows the PV field to follow roof edges and preserve clear areas around multiple roof penetrations and changes in roof geometry.
Real-project roof overview showing varied array row lengths and clearances around roof obstacles.
Six documented array types
Mechanical Roof Attachments Supporting Aluminum Rails
The mounting schedule identifies aluminum roof fittings used with the horizontal rail system. For a public-facing project page, the useful engineering story is the load path: module → clamp → rail → roof attachment → building structure.
Close-up of the L-foot roof fitting and its mechanical connection to the metal roof.
Roof-side design priorities
- Attachment type: mechanically fixed roof fitting / L-foot
- Rail material: AL6005-T5
- Module clamps: end and inner clamps
- Hardware: aluminum + SUS304 where documented
- Roof planning: attachment positions follow the structural support layout
- Weathering: sealing detail must match the actual roof profile
Different Rail Lengths for Different Module Groups
The design drawing uses dedicated rail lengths for the 1 × 1 through 1 × 7 array types. This keeps each small table aligned with the available roof zone rather than relying on one standard rail length everywhere.
Documented rail lengths
| Array | Rail length shown |
|---|---|
| 1 × 1 | 1300 mm |
| 1 × 2 | 2300 mm |
| 1 × 3 | 3400 mm |
| 1 × 4 | 4400 mm |
| 1 × 5 | 5500 mm |
| 1 × 7 | 7600 mm (4500 + 3100) |
Installed aluminum rail and module-clamp detail from the Thailand L-foot roof project.
Roof Connection Quality Matters as Much as Rail Layout
Completed roof connection detail showing attachment placement and the finished sealing treatment.
What installers need to verify
For mechanically attached metal-roof systems, the mounting hardware cannot be selected from PV capacity alone. The actual roof profile, substrate thickness, purlin location, fastener specification, edge zones and waterproofing method all affect the final detail.
What This 84.36 kW Roof Project Demonstrates
Flexible Tables Fit Complex Roofs
Six array lengths make it easier to use fragmented roof zones and work around penetrations without creating unnecessarily long rail runs.
Attachment Layout Drives the Load Path
The rail system transfers module loads through the roof fittings into the building structure, so attachment location and roof structure need to be coordinated.
BOM Follows the Roof Layout
Rail length, roof-fitting quantity and clamp quantity change with each table size. A project-specific layout therefore gives a more reliable BOM than a simple kW-based estimate.
About This Thailand L-Foot Roof Project
How many modules are installed?
The project documentation shows 228 modules at 370 W each, which equals 84.36 kW.
What module size is used?
The documented module size is 1750 × 1038 × 35 mm.
What array sizes are used?
The mounting design includes 1 × 1, 1 × 2, 1 × 3, 1 × 4, 1 × 5 and 1 × 7 module groups.
What is the design wind speed?
The supplied project documents state 29m/s. A new project needs its own site-specific wind design basis.
Is this a standing-seam clamp system?
No. The supplied mounting schedule identifies mechanically fixed roof fittings, consistent with the L-foot project description rather than a seam-only clamp connection.
Can the same rail lengths be reused?
Only when the module dimensions, orientation and required clearances match. Rail lengths should be recalculated for each new roof layout.
Planning an L-Foot Metal Roof Solar Project?
Send the module datasheet, roof profile, roof dimensions, purlin spacing, site wind/snow requirements and proposed array layout. These inputs can be used to select the roof attachment, rail lengths, clamp configuration and project BOM.