Charged EVs | Fluke’s FEV500 acts as a virtual EV to test DC fast chargers, replacing three separate instruments

One in five DC fast charging stations in the US isn’t operational, according to a Harvard Business School study that Fluke cites as the impetus for its new product. The FEV500 is an all-in-one testing tool for Level 3 DC fast charging stations that simulates the role of an electric vehicle—letting technicians run comprehensive safety, communication, and interoperability checks without bringing an actual EV to site.

That last part is the crux of why DC fast charger testing is more complicated than testing AC equipment. Level 3 stations don’t just push current—they negotiate a full digital handshake with the vehicle before a session begins. The FEV500 supports ISO 15118 and DIN SPEC 70121, the two main international standards governing EV-to-EVSE communication, so it can validate the protocol stack, not just basic electrical parameters. It also consolidates what would otherwise require three separate instruments: a digital multimeter, an insulation tester, and an oscilloscope.

The tool works through a single connection point with no disassembly required. It delivers PASS/FAIL results via guided workflows designed for field technicians without advanced training—auto-test sequences reduce manual input and test data logs directly to the device. Fluke says it can cover commissioning, maintenance, and troubleshooting from the same interface.

The chassis is built for field use: a rugged wheeled design for moving between depots and sites, plus a removable battery for air travel.

“Fast DC charging is the backbone of the EV transition, but the truth is, reliability is still the industry’s weakest link,” said Theo Brillhart, Technology Director at Fluke. “We built the FEV500 to close that gap.”

The FEV500 is available now.

Source: Fluke Corporation