NY to Begin Testing EV Fast Chargers for Accuracy
On March 6, 2026, the Amherst Bee reported New York’s Division of Weights and Measures is purchasing two load emulators, pickup-truck-sized machines that simulate EV charging behavior, at roughly $100,000 each. The goal is to finally test the state’s 2,932 Level 3 fast electric vehicle (EV) chargers for accuracy.
New York’s gas pumps, deli scales, and barcode scanners have long carried the blue and yellow seals of state Weights and Measures inspectors, assuring customers they are getting what they pay for. But the state’s 323,673 EV drivers have had no such protection at fast chargers.
Level 2 chargers have been testable for years using a simple “man in the middle” meter. Level 3 chargers are different. Their power is so high that they automatically slow the flow of electricity as a battery fills, making standard testing impossible. Load emulators solve that by mimicking a car at various states of charge, causing the charger to respond naturally while the device measures what is actually being delivered.
Level 2 and Level 3 chargers differ primarily in speed and use case. Level 2 chargers run on 240-volt power and typically deliver between 7 and 19 kilowatts, adding roughly 20 to 30 miles of range per hour. They are the most common type, found in home garages, workplaces, and municipal parking lots, and are best suited for overnight or all-day charging where speed is not a priority.
Level 3 chargers, also called DC fast chargers, operate on direct current and can deliver anywhere from 50 kilowatts on the low end to 350 kilowatts or more on the high end. They can add hundreds of miles of range in 20 to 30 minutes, making them the go-to option for long-distance travel and quick top-ups on the road. However, they are more expensive to install and operate, put more stress on the battery with repeated use, and as New York’s testing gap highlights, have historically been harder to regulate and verify for accuracy.
California, the national leader in EV ownership and charger testing, runs five of these emulators similar to the units New York is implementing. Their findings are reassuring on accuracy, with measurement errors typically between 0.05% and 0.8%. But the real problems show up elsewhere: faded screens, improper labeling, and pricing errors, especially when drivers charge through mobile apps.
With dozens of competing charger manufacturers and frequent software updates, inconsistencies are common. New York officials say many existing chargers lack proper markings, accurate pricing, and even basic contact information for when something goes wrong.
New York expects to seek bids in the coming weeks, with the emulators entering service later this year.
The situation in New York is a reminder that the EV charging industry, despite its rapid growth, still has significant ground to cover. From untested fast chargers and inaccurate billing to payment failures, connectivity issues, and speeds that fall far short of advertised rates, the public charging experience remains inconsistent and often frustrating for drivers.
The technology itself is advancing quickly, as frequent breakthroughs make clear. But hardware breakthroughs alone will not build driver confidence. Reliability, accuracy, and accountability across the entire charging network need to catch up before EVs can truly replace gas cars for every driver in every situation.
