On 6 August 2026 the U.S. Bureau of Industry and Security published a Federal Register notice requesting comment on adding 14 aluminium, steel and copper derivative categories, while a separate presidential proclamation set a minimum import price and a 15 percent duty on polysilicon and its derivatives.
Two announcements on the same day affect different products and have different legal statuses. One is a request for comment; the other is a proclamation. Neither should be described as a new tracker tariff.
We map the 14 categories against tracker and racking components and mark the status of each line.
Month at a glance
Mapping the 14 categories
Each proposed category is checked against tracker parts, racking structures and frames. The three rate levels of 15, 25 and 50 percent are recorded with the full-customs-value basis.
Transmission into tracker costs
Proposed versus in force
A request for comment is not an effective measure. Our table carries a status column so a reader cannot mistake a proposal for a payable duty.
Why polysilicon appears here
Polysilicon is an upstream module material, not a racking product. It is included as a supply-chain adjacent item with a note on possible indirect cost effects.
Data box
| Field | Value as reported |
|---|---|
| Date | 6 August 2026 |
| Action 1 | BIS notice proposing 14 derivative categories, comment period open |
| Rates proposed | 15 / 25 / 50 percent on full customs value |
| Action 2 | Polysilicon minimum import price plus 15 percent |
| Classification | Racking measure: no; supply-chain adjacent: yes |
All figures above are quoted with the unit and reference period used by the primary source. They are reproduced here for reference, not independently re-measured.
Next month's watchlist: verification note
Both 6 August actions are proposed or newly announced and their status and effective dates must be checked line by line. Polysilicon is not a racking product and is never listed as a tracker tariff.
What to watch next
The close of the comment period and any final list of included derivative categories.
Primary sources
- BIS Federal Register notice, 2026-08-06 (request for comments)
- Presidential proclamation on polysilicon, 2026-08-06
- LME / CRU / Fastmarkets price series
Price series and policy rates in this column are dated. Always check the take-date printed next to each figure.
Researched and written by the solarrack.wiki editorial desk. Every figure in this article carries a source and a verification note; where a claim could not be confirmed against a primary document, it is labelled as such. Corrections: [email protected]
