California adds two layers that a national compliance programme does not cover: efficiency rules for the products in scope and chemical exposure warnings under the state’s safe drinking water and toxic enforcement act.
Both are documentation-heavy, and both can be resolved before artwork is printed if they are identified early.
What do CEC and Prop 65 require of a charger?
Efficiency evidence and exposure warnings.
The CEC programme sets efficiency requirements for products in scope, while Prop 65 requires a warning where a listed chemical exposure exceeds the applicable threshold.
The CEC requirements sit alongside the federal external power supply rules and apply to the products within their scope; the federal framework is published in the US regulations (10 CFR Part 430), with programme information from the Department of Energy (DOE appliance and equipment standards).
Prop 65 is a warning requirement. It does not ban a product; it requires a clear and reasonable warning where an exposure to a listed chemical occurs above the applicable level. The current list and guidance are published by the state’s office of environmental health hazard assessment (OEHHA: Proposition 65).
Warning formats and where they appear
Warnings may be placed on the product, on the packaging or at the point of sale, and short-form versions exist for constrained surfaces. The choice affects artwork and, in some cases, the listing content for online sales.
| Surface | What appears | Artwork implication |
|---|---|---|
| Product | Warning symbol or short-form text where applicable | Housing print or label |
| Packaging | Full or short-form warning | Regional packaging variant |
| Online listing | Warning in the product description or image | Listing template update |
| Instruction sheet | Additional explanation where used | Language set in the sheet |
Testing and documentation expectations
The documentation for a warning is a determination rather than a certificate: the manufacturer assesses whether an exposure requires a warning and records the basis. For a charger, the relevant questions concern the materials in the enclosure, the cable and the packaging.
Where a supplier provides a compliance statement, the buyer should confirm which model it covers and whether it addresses the components that changed since the statement was issued.
Electronic and marketplace enforcement patterns
Enforcement in this area is often driven by notice letters and by marketplace audits rather than by inspection. That is why a listing that carries a warning while the packaging does not, or vice versa, creates avoidable exposure.
The practical control is a single source of truth for the warning text, used for the listing, the packaging and any instruction sheet.
What suppliers should provide
Three items cover most needs: the model-level efficiency evidence, a materials statement covering the components that carry the warning question, and a statement of which warning text applies to the model.
WECENT’s certification-ready designs cover CEC and DOE among other schemes depending on the model, with batch inspection records produced at the quality control gates and documentation available under NDA through the OEM/ODM programme; the platform range is listed in the product catalogue.
Keeping state and federal requirements aligned
The federal and state programmes interact: meeting the federal requirement does not automatically satisfy the state one, and the warning requirement is independent of both. A programme document that lists each requirement, the evidence and the owner keeps them from being conflated.
That structure also makes a future expansion easier, because adding a market becomes a new row rather than a new project.
Practical checklist for a charger programme
Confirm whether the product is in scope of the state efficiency programme, assemble the efficiency evidence per model, decide the warning format and surface, update the listing template, and record the determination with the compliance file.
Those five steps take less time than responding to a notice letter, which is the usual alternative when the warning is treated as a packaging afterthought.
Where the warning decision belongs in the project plan
The warning decision belongs with the artwork review, not after it, because it changes the panel layout. Putting it in the same approval gate as the wattage and port claims means one review instead of two, and it prevents a reprint.
Transit performance for the packaging can be validated separately against a published protocol (ISTA), and EMC evidence for the electronics follows frameworks such as the FCC Part 15 rules, so the compliance file ends up covering performance, safety and labelling in one place.
FAQ
Does Prop 65 apply to chargers?
It applies where a listed chemical exposure occurs above the applicable threshold, and the obligation is to provide a clear and reasonable warning. It is a warning requirement rather than a product ban, and the determination should be documented per model.
What is the difference between CEC and DOE requirements?
Both concern efficiency for products in scope, with the federal framework applying nationally and the state programme adding its own requirements for that market. Meeting one does not automatically satisfy the other, so the evidence should be mapped per requirement.
Can the Prop 65 warning go on the packaging instead of the product?
Warning placement may be on the product, the packaging or at the point of sale, and short-form versions exist for constrained surfaces. The choice affects artwork and, for online sales, the listing content.
What documents should a supplier provide?
Model-level efficiency evidence, a materials statement covering the components relevant to the warning question, and a statement of which warning text applies to the model.
Why do marketplace audits catch this issue?
Because the listing and the packaging have to agree. A warning on one and not the other is visible to an auditor and creates avoidable exposure, which is why a single source of truth for the warning text is the practical control.
This article is part of Compliance & Power Supplies, the guide that covers this topic in decision order.
Selling chargers in California?
Share the models, packaging format and channels, and WECENT will confirm the efficiency evidence, materials documentation and labelling options available.