NACS (North American Charging Standard) is the unified EV charging connector standard for North America, formally codified as SAE J3400. Tesla developed the connector in 2012, opened it to the industry in November 2022, and SAE International standardized it so that any automaker or charging manufacturer can build vehicles, chargers, and stations around one plug.
The connector uses a single, compact five-pin design that supports both AC Level 2 charging and DC fast charging through the same inlet. Compared with the older CCS1 “combo” plug, it is roughly 40% smaller and lighter, which makes the cable easier to handle and eliminates the fragile latch that was the most common CCS1 handle failure point.
NACS Key Specifications
| Parameter | Specification |
|---|---|
| Voltage | Up to 1,000 V DC |
| Current | 500 A continuous (900 A peak demonstrated) |
| Power | 250–500 kW deployed today; up to 1 MW in the J3400 specification |
| Pins | 5 (2 power, 1 ground, 2 signal), unified for AC and DC |
| Communication | ISO 15118 (PLC), native Plug & Charge |
| Safety certifications | UL 2251 (connector), UL 2252 (adapters) |
Why NACS Matters in 2026
NACS is now the default charging port on over 90% of 2026 model-year EVs sold in North America, including every Tesla and new models from Ford, GM, Rivian, Volvo, Mercedes, and Toyota. By December 2025, NACS connectors were available at more than 72,000 stalls across the continent, and federal NEVI-funded stations are now required to be J3400-compatible.
For station operators, NACS is not yet the only connector that matters. Roughly five million CCS1-only EVs will remain on North American roads through 2030, so the practical 2026 strategy is dual-port dispensers with both NACS and CCS1 cables, then a gradual shift to NACS-dominant sites as the fleet turns over.
NACS is a North American standard, not a global one. Europe mandates CCS2, and China uses GB/T, so buyers serving multiple regions should still source hardware with the connector mix each market requires.
How NACS Compares with CCS and CHAdeMO
CCS1 served as the dominant non-Tesla DC fast-charging standard in North America and remains widely installed, while CHAdeMO is being phased out in Western markets but still leads in Japan. NACS won the North American standards transition because of its compact design, high reliability, and near-universal automaker adoption.
For the full connector-by-connector comparison — technical specifications, adoption timelines, regional deployment guidance, and retrofit options — read our in-depth guide: CCS vs CHAdeMO vs NACS.
Deeper Reading
- For commercial operators selecting Tesla-compatible hardware, power levels, and dual-connector station design: EV chargers compatible with Tesla
- For definitions of related standards: CCS, CHAdeMO, and J1772
Planning a NACS-ready charging deployment? Contact Klitv’s engineering team for dual-connector hardware specifications and project guidance.