The consolidated IEC 62817:2014+AMD1:2017+AMD2:2026 CSV was published in late September 2026, changing how tracking accuracy and several related quantities must be documented.
Tracker accuracy has often been argued from controller set-points or simulation output. The amendment pushes the evidence base toward measurement under defined conditions.
For procurement teams, the practical consequence is that a datasheet claim and a test report are no longer interchangeable documents.
The engineering problem
Accuracy becomes a statistical statement
The revised text distinguishes low and high wind-speed conditions and asks for both typical behaviour and a 95th-percentile figure. A single 'tracking accuracy' number without a wind band and a statistic is not a compliant claim.
What changes in practice
Energy and ingress are split into specified cases
Daily energy consumption, stow-related consumption and defined operating conditions are treated separately. Enclosed parts and motors carry different ingress protection levels, and the corrosion classification has a stated floor.
A mechanical test is not a structural design approval
Type testing of a tracker assembly does not certify the foundation, the site-specific wind design or the structural connection to the module. Tender documents should list these as separate evidence items.
Data box
| Field | Value as reported |
|---|---|
| Standard | IEC 62817:2014+AMD1:2017+AMD2:2026 CSV |
| Published | Late September 2026 |
| Accuracy reporting | Measured; low/high wind bands; typical and 95th percentile |
| Ingress protection | Enclosed parts IP55 minimum; motors IP65 minimum |
| Corrosion | ISO 9223 C2 minimum |
| Scope boundary | Mechanical type test does not replace structural or foundation design approval |
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.
Limits of the evidence: verification note
Earlier drafts of our playbook wrote 'IEC 62817:2026'. The formal designation is the consolidated 2014+AMD1:2017+AMD2:2026 CSV. Publication dates differ by a day across sources; the IEC Webstore entry governs.
What to watch next
National adoptions and whether major tender templates update their accuracy clauses to require measured percentiles.
Primary sources
- IEC Webstore: IEC 62817:2014+AMD1:2017+AMD2:2026 CSV (published 2026-09-28)
- IEC TC 82 document 82/2651/FDIS (vote 2026-07-10 to 2026-08-21)
- IEC TC 82 work programme: IEC 62817-1 ED1
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]
