Appendix A: Allowable Mounting System Loading
Tesla Compatible modules have been evaluated for design loads on the back surface (e.g., wind load) and on the front surface (e.g., wind and snow load)
UL 2703 Requirements:
PV Modules were evaluated at the following attachment spacings in order for Tesla Solar hardware to obtain load ratings using specified test procedures:
| ZS Comp | ||||
|---|---|---|---|---|
| Module | Landscape | Portrait | ||
| Attachment Spacing | Load (PSF) | Attachment Spacing | Load (PSF) | |
|
Tesla T420S, T425S, T430S and T395H, T400H, T405H |
24" |
100 - front side; 72 - rear side |
24" |
31.3 - front side; 37.5 - rear side |
|
Q Cells Q.Pro-G4 where ### = 250-265 |
24" |
50 - front side; 72 - rear side |
24" |
50 - front side; 72 - rear side |
|
Q.Pro-G4.1 where ### = 270-325 |
||||
|
Q.Peak Duo BLK G5 where ### = 310-320 |
||||
|
Q.Peak Duo BLK G6+ where ### = 330-345 |
||||
|
Q.Peak Duo BLK ML-G10+/TS where ### = 395-415 |
24" |
100 - front side; 72 - rear side |
24" |
31.3 - front side; 37.5 - rear side |
Tesla Solar Hardware must be installed following all applicable instructions.
Listed by UL to UL 2703 for a mechanical load rating up to 100 psf downforce and up to 72 psf uplift. This racking system is Listed for fire performance, grounding and mounting of Listed PV modules where the combination of Listed module and Listed racking system has been evaluated.
| Allowable Module Design Loading** | |||||||
|---|---|---|---|---|---|---|---|
|
Tesla H-Series Tesla S-Series Hanwha ML-G10+/TS |
Long Side Mounting (Landscape) |
Short Side Mounting (Portrait) |
|||||
| Maxium Span / Cantilever [in]* | 72 / 24 | 48 / 16 | 39 / 13 | 24 / 8 | 24 / 4 | 48 / 16 | 24 / 8 |
| Design Load Pull [psf] (bottom side) | 30 | 50 | 50 | 85 | 85 | 20 | 42 |
| Design Load Push [psf] (top side) | 30 | 50 | 75 | 85 | 100 | 20 | 42 |
*maximum cantilever is always 1/3 of maximum span length
** Capacities in table are in addition to those covered by UL 2703.
| Allowable Hardware Component Design Loads* | |||
|---|---|---|---|
| Component Assembly | Uplift | Downforce |
Lateral |
|
ZS COMP WITH FLASHING INSERT (Configuration A) |
456 lbs. (2029 N) |
993 lbs. (4418 N) |
455 lbs. (1979 N) |
|
ZS COMP WITH FLASHING ACCESSORY (Configuration B) |
643 lbs. (2860 N) |
371 lbs. (1650 N) |
427 lbs. (1899 N) |
* Underlined values above are governed by lag screw withdrawal and are normalized to framing members with a minimum specific gravity of 0.42.
Underlined values may be adjusted by 
where appropriate
to lumber species specific gravity, with a maximum adjustment factor of 1.50.