The National Institute of Standards and Technology (NIST) reported on October 7, 2026 that more than 70 weights and measures officials, inspectors, service technicians and industry representatives completed the third and final National Council on Weights and Measures (NCWM) training on inspecting retail EV chargers. NIST’s Office of Weights and Measures (OWM) also confirmed a new five-day EVSE metrology course at its Gaithersburg campus, with a first beta class from November 16 to 20, 2026.
Key Takeaways
- More than 70 participants completed NCWM’s final EVSE inspection training in September.
- Training followed NIST Handbook 44 Section 3.40 and EPO 30.
- NIST will pilot a 5-day EVSE metrology course from November 16 to 20, 2026.
- Public charger operators should prepare for more field accuracy checks.
Key Facts
| Item | Detail |
|---|---|
| Training dates | September 1–4, 2026, Annapolis, Maryland |
| Format | 3.5 days, classroom plus hands-on testing of AC and DC chargers at two commercial sites |
| Participants | More than 70 |
| Reference | NIST Handbook 44, General Code and Section 3.40 for Electric Vehicle Fueling Systems |
| Inspection procedure | Examination Procedure Outline (EPO) 30, Retail Electric Vehicle Fueling Systems |
| Next course | 5-day program, class size limited to 12; beta Nov 16–20, 2026; regular classes from spring 2027 |
What Inspectors Were Taught
OWM instructors covered method-of-sale requirements, device evaluation, certification, SI traceability, inspection procedures and field testing. Practical sessions dealt with the hardware, software, activation methods, apps and communications systems that inspectors meet at real charging sites. OWM Chief Katrice Lippa told attendees the shared goal was to make EV charging a marketplace that people can trust.
The new Gaithersburg program will use a dedicated classroom and laboratory with EVSE equipment installed for hands-on testing, aimed at officials, registered service agents and metrologists.
What It Means
As more state programs train inspectors, chargers that sell electricity by the kilowatt-hour are more likely to be field-tested for accuracy and for how prices and energy are shown to drivers. Site owners and operators should keep commissioning records, meter documentation and any type evaluation certificates ready, and expect inspections to cover both the hardware and the payment and display software.
Manufacturers and importers supplying U.S. public sites should confirm metering accuracy claims and documentation before deployment. Commercial buyers can discuss metering and documentation needs with EVDANCE through our commercial charging solutions or contact page.
Related Reading
- UL and ETL Listing for EV Chargers: How NRTL Certification Works
- How Do Commercial EV Charging Stations Work?
- Commercial EV Charger Maintenance Checklist
