UL Adds V2G Testing to U.S. DC Fast Charger Certification

On June 28, 2026, UL Solutions put into effect an update to UL 2594 Ed.3.1 that adds a new certification requirement for DC fast chargers intended for the U.S. market: interoperability testing for the ISO 15118-20 V2G bidirectional communication protocol, together with a V2G function verification report issued by a UL-authorized laboratory. For charger exporters, certification teams, North American buyers, and delivery planners, the development matters because it directly affects certification timing and may disrupt Q3 shipment schedules for Chinese manufacturers serving the U.S. market.

What the UL 2594 Ed.3.1 update now requires

According to the information provided, UL Solutions made the revision effective on June 28, 2026. Under the update, all DC fast chargers for the U.S. market must add ISO 15118-20 V2G bidirectional communication protocol interoperability testing during certification. In addition, applicants must provide a V2G function verification report issued by a UL-authorized laboratory. The same information indicates that this change is expected to extend export certification cycles for Chinese charging equipment manufacturers by about three to four weeks, with an impact on Q3 North America order delivery rhythm.

Where the pressure is likely to appear first

Exporting manufacturers face a tighter certification window

From an industry perspective, Chinese DC fast charger manufacturers exporting to the United States are the most directly affected group in the near term. The reason is straightforward: the new requirement sits inside the certification process itself. The main pressure point is not only technical readiness, but also the added time needed to complete interoperability testing and obtain the required UL-authorized laboratory report. What deserves closer attention is whether product launch, shipment release, and customer acceptance milestones were originally built around the previous certification timeline.

North American buyers may need to revisit delivery planning

Buyers and project-side procurement teams in North America may be affected through order scheduling and delivery coordination. Based on the provided information, the expected three- to four-week extension creates a risk that Q3 delivery plans will need adjustment. The practical concern here is less about demand change and more about timing: whether procurement, installation, and acceptance schedules were linked to products that are still moving through certification.

Certification and compliance functions become more time-sensitive

For compliance teams, test coordination staff, and external certification service providers, the change raises the importance of documentation control and test sequencing. The business impact is concentrated in application preparation, lab scheduling, and report completion. Observably, companies involved in supporting exports to the U.S. market will need to pay close attention to whether all required materials for V2G verification are ready at the point of submission.

What companies should focus on now

Track the exact certification scope in active U.S.-bound projects

Companies should first confirm which DC fast charger models in current export pipelines fall within the updated requirement and whether those projects are already in certification, waiting for submission, or tied to near-term delivery commitments. This is a practical checkpoint because the rule is effective as of June 28, 2026, and timing differences across projects will shape the immediate operational impact.

Recheck testing and documentation readiness for V2G verification

The new requirement is not limited to adding a test item in principle; it also includes the need for a V2G function verification report from a UL-authorized laboratory. Analysis shows that companies should pay close attention to whether their existing certification package already supports this additional step, especially in terms of interoperability test preparation and supporting documentation.

Prepare for customer communication around delivery changes

Given the stated three- to four-week extension to certification cycles for Chinese manufacturers, exporters and account teams should closely watch customer-facing delivery commitments. The key issue is not to assume every order will be delayed in the same way, but to identify where certification timing could affect Q3 North America shipment rhythm and to communicate that risk clearly in advance.

Separate the rule signal from actual project-level impact

What deserves closer attention is the difference between a standards update and its project-by-project operational effect. The confirmed fact is that the new test and report requirement is now part of certification for relevant products. The business consequence, however, still depends on where each company stands in its certification and delivery cycle. That distinction matters for internal planning, supplier coordination, and buyer discussions.

Why this looks like more than a routine procedural change

Analysis shows that the update should not be read only as an administrative adjustment to export paperwork. It signals that protocol-level V2G interoperability is being treated as a certification issue for DC fast chargers entering the U.S. market. At the same time, it is more appropriate to understand the current development as a concrete near-term compliance change with immediate scheduling effects, rather than as a complete market reshaping event. Industry participants still need to keep watching how consistently this requirement influences certification queues and delivery planning in practice.

How this update is best understood at this stage

At this stage, the UL 2594 Ed.3.1 update is best understood as an immediate compliance and delivery-timing issue for companies exporting DC fast chargers to the United States, especially those managing Q3 North America orders. The confirmed change is clear, and the likely pressure on certification cycles is already identifiable from the information provided. The broader industry meaning is real, but it should be viewed cautiously: this is a firm operational signal now, while its longer-term commercial impact still requires continued observation.

Basis of this article and what still needs verification

This article is based on the user-provided news title, event date, and event summary. For developments of this type, commonly relevant source categories may include official notices, company announcements, industry association updates, authoritative media reports, and standards organization documents. No specific official source link was provided in the input, so the exact source document and any later interpretive guidance still need ongoing verification. Follow-up attention should remain on whether additional official wording, implementation clarifications, or related certification guidance emerges after the effective date.