Description
Heavy-Duty End-Clamp for Commercial-Grade Solar Arrays
The SFS-ECN2-40AL is a 40mm-specific solar end-clamp engineered for the heavier panel frames that dominate commercial, agricultural, and industrial deployments across Kenya. While residential solar increasingly uses slimmer 30mm or 35mm panel frames, the 40mm frame remains the structural standard for high-wattage modules above 600W — the same modules that anchor most school rooftop projects, agribusiness pumping systems, and ground-mounted commercial arrays. The end-clamp that holds these panels at the leading and trailing edges of every row faces uniquely high mechanical loading and must be specified accordingly.
This product is dimensioned exactly for 40mm aluminum frames, supplied with a longer DIN912 M8×30 bolt to ensure full thread engagement after passing through the heavier frame profile. The clamp body is extruded from 6005-T5 structural aluminum and fully anodized; the fastener set is SS304 stainless steel. Both materials meet the technical specifications required by EPRA-aligned commercial commissioning and major tender documents.
Technical Datasheet
| Specification | Detail |
|---|---|
| Part Number | SFS-ECN2-40AL |
| Product Type | Heavy-Duty End-Clamp (J-Profile, 40mm fit) |
| Compatible Panel Frame Thickness | 40mm (precision fit, not adjustable) |
| Clamp Length | 40mm (L=40mm) |
| Body Material | Aluminum alloy 6005-T5, anodized finish |
| Bolt | DIN912 M8×30 SS304 stainless steel |
| Washer | M8 spring washer, SS304 |
| Nut | Nut-2Module (6005-T5 anodized), pre-fitted sliding rail nut |
| Compatible Rail Profile | Standard 38mm-channel aluminum rails (residential and commercial) |
| Tightening Torque | 18–22 Nm |
| Required per Panel Row | 4 clamps (2 at each row end, one per rail line) |
| Wind Load Resistance | Rated for 60 m/s wind speed |
| Bulk Availability | Held in commercial-quantity stock for tender deployments |
| Service Life | 25+ years in Kenyan tropical climate |
| Warranty | 10 years structural |
When You Need a 40mm End-Clamp Specifically
The 40mm size belongs to a defined category of commercial and industrial solar projects:
- 670W+ heavy-wattage panels. Most current-generation modules in the 600W–700W class use 40mm frames to provide the structural rigidity their larger physical dimensions demand. These panels typically measure around 2382mm × 1134mm — significantly larger than residential 540W panels.
- Bifacial heavy-duty modules. Several N-type bifacial designs use 40mm frames to support their dual-glass laminate without flexing during transport, handling, and wind loading.
- Commercial-generation panels from before 2020. Many polycrystalline and earlier monocrystalline modules from the pre-2020 manufacturing window used 40mm frames as the industry default for commercial-grade products.
- Heavy-duty ground-mount installations. Solar pumping projects, irrigation systems, and rural agribusiness deployments often specify 40mm-frame panels for the additional damage tolerance against dust, vibration, and incidental impact.
If your project specification calls for any of these panel categories, the matching end-clamp is the ECN2-40AL — paired with the matching 40mm mid-clamp (SFS-MC3N2-40AL) for the panel-to-panel joints.
End-Clamp Counts for Commercial Project Scales
Commercial-scale arrays require careful quantity planning because end-clamps multiply with row count, not panel count within a row. Quick reference for typical commercial deployments:
| Project Configuration | Approximate Panel Count | End-Clamps Required |
|---|---|---|
| Single-row 12-panel array | 12 panels | 4 |
| Two rows of 12 panels each | 24 panels | 8 |
| Three rows of 16 panels | 48 panels | 12 |
| Four rows of 20 panels | 80 panels | 16 |
| Six rows of 25 panels | 150 panels | 24 |
| Ten rows of 30 panels | 300 panels | 40 |
| Large utility ground-mount | 500+ panels | Varies — quote required |
For tender preparation, the solar calculator generates a detailed bill of materials from your roof or ground-mount layout. Bulk pricing tiers apply at 50, 200, and 1000 clamp quantities — request a commercial quote through the quote form for project-scale requirements.
Completing the Commercial Mounting System
- Matching 40mm mid-clamps: The SFS-MC3N2-40AL is the panel-to-panel clamp that pairs with this end-clamp for a consistent 40mm-spec array build.
- Heavy-duty aluminum rails: Commercial spans typically use the SunRack Rail-19 or Rail-20 profiles rather than the lighter residential Rail-12.
- Ground-mount support legs: For tilted ground arrays, the SFS-AL3NT series adjustable support legs (225mm, 380mm, 455mm lengths) build complete frames at 15°–35° tilt angles.
- Roof anchor points: TRG-series tin roof clamps for mabati-roofed commercial buildings, or LFN2S L-feet for timber-frame structures.
- Earthing kit: Earth lug (ELN2-20AL) and grounding clips (GC-01) for EPRA-compliant electrical bonding across commercial-scale arrays.
- Solar panels: Browse our 670W+ commercial solar panel range.
- Commercial inverters: Our three-phase inverter range handles 10kW–15kW commercial generation requirements.
- Battery storage for commercial backup: Stacked lithium batteries for resilient commercial energy storage.
- Tender-grade quote: Request a commercial quote with your panel model, project scope, and deployment timeline.
