Description
One Clamp, Two Frame Sizes — Less Stock, Less Guesswork
The adjustable end-clamp solves a practical headache for installers and buyers alike: needing to know the exact panel frame size before ordering clamps, and needing to keep both 30mm and 35mm end-clamps in stock to cover whatever job comes next. This single clamp fits both frame sizes. Whether the panel has a 30mm frame or a 35mm frame, the same clamp secures it at the row edge, adjusting to the frame depth as it is tightened down.
For an installer running multiple jobs, this means one end-clamp SKU on the van instead of two, and no risk of arriving on site with 30mm clamps for a 35mm-frame job. For a buyer who is not certain of their panel’s exact frame depth — a common situation — it removes the guesswork: the adjustable clamp covers the two most likely sizes, so a 30mm-versus-35mm mix-up no longer stops the installation.
How the Adjustable Clamp Differs From a Fixed One
A fixed end-clamp is machined for one specific frame depth — a 30mm clamp grips 30mm frames and nothing else. It works perfectly when you know your frame size and stock the matching clamp, which is why fixed clamps remain the precise choice for a known, single-frame installation. The adjustable clamp trades that single-size precision for flexibility: its design lets it close securely on either a 30mm or a 35mm frame, taking up the difference in frame depth within its adjustment range.
The practical effect is fewer part numbers to manage. Instead of stocking and tracking separate 30mm and 35mm end-clamps, an installer can carry the adjustable clamp to cover both. The trade-off is a slightly higher unit price than a single fixed clamp — but against the cost and hassle of stocking two separate sizes, and the risk of a size mismatch halting a job, the adjustable clamp often comes out ahead for a busy installer.
Technical Specifications
| Specification | Detail |
|---|---|
| Type | Adjustable end-clamp (edge clamp) |
| Frame Range | 30mm and 35mm in one clamp |
| Material | Al6005-T5 aluminium alloy |
| Finish | Anodised silver (black on request) |
| Fastener | Stainless steel T-bolt and flange nut |
| Rail Compatibility | All standard solar mounting rail profiles |
| Position | Outer edges of each panel row |
| Adjustment | Accommodates either frame depth as it is tightened |
| Service Life | 25+ years |
When the Adjustable Clamp Is the Smart Choice
- You run varied installations: jobs come in with a mix of 30mm and 35mm panels, and carrying one clamp for both simplifies your stock
- You’re unsure of the frame size: the adjustable clamp covers the two most common depths, so a measurement error does not stall the job
- You buy ahead of knowing the panels: stocking adjustable clamps lets you commit to clamp inventory before the exact panels for a job are confirmed
- You want fewer part numbers: one SKU instead of two reduces ordering complexity and minimum-order fragmentation
For a single known-frame installation where you are certain of the size, a fixed clamp in that exact size is the precise and slightly cheaper option — see our 30mm and 35mm fixed end-clamps. The adjustable clamp earns its place wherever flexibility and simpler stocking matter more than single-size precision.
End-Clamp Quantity
Like any end-clamp, the count is set by rows, not panels — two outer edges per row across two rails gives four end-clamps per row.
| Number of Rows | End-Clamps Required |
|---|---|
| 1 row | 4 |
| 2 rows | 8 |
| 3 rows | 12 |
The internal junctions between panels use mid-clamps. Our solar calculator works out both clamp types for the full layout.
Quality at the Row Edge
An end-clamp holds the most wind-exposed position on the array, so its build matters regardless of whether it is fixed or adjustable. This clamp uses the same Al6005-T5 aluminium and anodised finish as the fixed range, with a stainless steel T-bolt that resists rust and stays serviceable. The adjustability is in how it accommodates frame depth, not a compromise on strength — it holds either frame size as securely as a fixed clamp holds its single size.
Cross-Sell
- Fixed-size end-clamps: 30mm, 33mm, 35mm, and 40mm for known single-frame jobs
- Mid-clamps: 30mm and 35mm for the internal junctions
- Rails: 4800mm and 4400mm rails
- Roof anchors: L-foot screw kit and tile roof hook
- Project quote: request a quote
