Q: What’s the difference between UL listing and ETL listing?
A: UL and ETL are both what are called Nationally Recognized Testing Laboratories (NRTL). NRTLs are in place to provide independent safety and quality certifications on products. Electrical appliances typically require their certification (especially 240V appliances). Some charging station manufacturers do sell unlisted products; it is very important to check for the UL or ETL mark before purchasing. Click here for the Current List of NRTLs Approved for EVSE Testing and Certification.
UL develops the testing standards and tests to them. ETL tests to UL standards. In order for an inspector to sign off on a permitted installation for an EVSE, the National Electric Code requires the EVSE be NRTL listed.
ClipperCreek does use both laboratories; the selection of which laboratory depends on which company provides the best value for their service that we can then pass on to our customers.
ClipperCreek would never sell a charging station that was not NRTL certified. Consumers should check carefully before buying an EV charging station to be certain that is either ETL or UL listed. Look for one of these marks on the EV Charging Station:
For additional information about Safety Certifications see our post “EV Charging Stations: Staying Safe“
You can also watch our short video: Charging Station Buyer’s Guide: Staying Safe