A skylight cleaning robot sold in 2026 should carry a CE Declaration of Conformity, an IP rating of at least IP54 for outdoor use, EMC test evidence, and a battery UN38.3 transport report. Ask for the actual documents, not a photo of a label, before you sign.
Buyers send us spec sheets with a CE logo and nothing behind it. That logo means the manufacturer claims conformity. The paper behind it is what protects you when a robot fails on a roof or a shipment gets held at customs.
What does each certificate actually cover?
| Document | Covers | Red flag if missing |
|---|---|---|
| CE Declaration of Conformity | Machinery and low-voltage safety | no signed declaration |
| EMC report | electromagnetic interference | no test standard named |
| IP rating test report | dust and water ingress | IP claimed with no test |
| UN38.3 battery report | lithium battery air/sea transport | battery ships without it |
| ISO 9001 (factory) | production consistency | rarely a hard blocker |
IP rating deserves a note. IP54 means limited dust ingress and splashing water protection. For an outdoor skylight robot working in rain-adjacent conditions, IP54 is a floor, not a target. IP65 is better if your site sees driving rain.
Why does the battery report matter for cleaning robots?
Lithium packs power most skylight robots, and carriers will refuse a shipment without a UN38.3 report. If you are importing, this single document can delay a delivery by weeks. Get it before the purchase order, not after.
Which claims should you ignore?
“Military grade”, “aerospace certified” and unbranded “ISO compliant” lines. None of these map to a test report you can read. A genuine CE declaration names the standards, the testing body and the date. If a supplier cannot produce that in one email, treat the certification claim as absent.
Who does not need the full set?
A buyer replacing one indoor skylight robot in a climate-controlled atrium has little weather exposure, so IP65 and rain testing are optional. The CE declaration and UN38.3 report still apply. Scale the paperwork to the site, but never skip the two documents that affect safety and shipping.
One risk worth stating: some integrators re-certify a cheaper robot under their own brand and pass the old report to you. Check the model number on the report matches the exact unit. Queries on documents go through contact.
Do insurance and warranty care about certification?
Yes, and they ask differently. Insurers want evidence the machine is safe to operate on a roof, which is where CE and IP documentation help. Warranty terms are narrower: many manufacturers void cover if the robot is used outside its stated IP rating, above its rated slope, or in winds beyond the cut-off. Read the manual’s limits as warranty conditions, not suggestions.
A common dispute: a leak damages a ceiling, and the insurer asks whether the robot was rated for wet conditions. If the machine was IP54 and the site sees driving rain through a broken seal, the claim gets complicated. Buy margin: match or exceed the site’s real conditions.
How do you verify a certificate is real?
Check three things. The standards named in a CE declaration should be relevant to machinery and electrical safety. The model number on every report should match the exact unit you are buying, not a sibling model. And the issuing lab should be identifiable, not a logo-less PDF. If a supplier cannot walk you through the documents in one call, treat the paperwork as incomplete until they can.
What about operator safety rules on top of the machine?
Certification covers the robot; your site still needs rules. Restrict roof access during a cycle, require a spotter when the robot works near an edge, and define a wind cut-off. None of that comes from a certificate, and insurers increasingly ask to see it written down. A one-page method statement beats a thick manual nobody reads.
Do robots need certification for the robot’s own electrical parts?
Yes, and this is where CE covers more than buyers expect. The declaration usually spans machinery safety and electrical safety, including the charger, the battery and the motor drivers. A charger without its own conformity evidence is a weak point, especially if it draws significant current and sits on a roof near water. Check the charger as carefully as the robot.
Cabling matters too. Outdoor runs to a charging point need appropriate IP protection and, in many jurisdictions, a qualified electrician. A robot that passes certification can still fail a site inspection if the power installation around it does not meet code.
How do certifications age?
Standards get revised. A declaration from several years ago may reference a superseded edition of a standard, which can matter when an insurer or customs officer looks closely. Ask for the document’s date and the standard editions it cites. Freshness is not a legal requirement in every market, but it is a signal the manufacturer keeps current rather than coasting on an old file.
For a fleet purchase, request the certification pack for the exact model and revision you are buying. A report tied to an earlier revision of the same model is better than nothing, but it is not the same document.
Key Takeaways
- Demand the signed CE Declaration of Conformity, not a label photo.
- IP54 is the minimum for outdoor skylight use; IP65 suits driving rain.
- UN38.3 battery reports are required to ship lithium packs legally.
- Ignore military-grade and aerospace claims with no readable test report.
- Match the model number on every report to the exact unit you buy.