A nationwide class-action lawsuit is being filed against Hyundai, Kia and Genesis in the U.S. over allegedly faulty charging ports, Inside EVs reports.

First filed late last month with the US District Court for the Central District of California, the suit has argued that the Hyundai Ioniq 5 and Ioniq 6, the Kia EV6 and the Genesis GV60 are equipped with defective charging ports, causing longer charging times than what was advertised or failing to charge altogether.

While automakers have advertised the vehicles as requiring only five to seven hours of charging time with the use of a Level 2 home charger, 

The plaintiffs allege that the charging ports overheat after only 30 minutes, causing an increase in charging time. 

Complaints have reported vehicles experiencing a drop in charging amperage from 48 amps to 28 amps in the event of overheating, with one plaintiff claiming his 2023 Ioniq 5 takes 20 hours to fully charge.

Though Hyundai initially deployed a software update to remedy the issue, it only resulted in doing nothing or even making it worse in some cases, according to an e-mail received by Inside EVs.