Short answer
NACS (North American Charging Standard, standardized as SAE J3400) is the charging connector originally developed by Tesla and now adopted by most major automakers for North America. One compact plug handles both AC charging and DC fast charging, unlike the CCS1 approach of a J1772 connector with a separate DC combo extension. For charger buyers, NACS is now a configuration question on every US-bound order.
What Is NACS (SAE J3400)?
NACS is the standardized, openly documented version of the connector Tesla used in North America since 2012. After Tesla opened the design in late 2022, SAE International formalized it as J3400, giving other automakers and charging manufacturers a documented specification to implement. The connector carries AC or DC over the same two power pins — the vehicle and charger negotiate which — which is why the plug is dramatically smaller than a CCS1 combo inlet.
Two consequences matter for buyers. First, one inlet design covers home AC charging and 250kW-class DC fast charging. Second, because AC and DC share pins, the communication protocol does the safety work: DC sessions use the same PLC/ISO 15118 family as CCS, which is why charger electronics can support both standards with different cable assemblies.
NACS vs CCS1: Technical Comparison
| Dimension | NACS (SAE J3400) | CCS1 |
|---|---|---|
| Connector size | Compact, single format for AC and DC | Larger combo inlet; AC section + DC pins |
| AC charging | Same pins as DC, up to ~19.2kW single-phase | Via J1772 section, up to ~19.2kW single-phase |
| DC fast charging | 250kW-class today; J3400 documents higher-power paths | 350kW-class in current installations |
| Communication | PLC, ISO 15118 family (J3400 DC) | PLC, DIN 70121 / ISO 15118 |
| Vehicle base | Tesla fleet + new models from most automakers (2025+) | Existing non-Tesla EV fleet in North America |
| Public funding rules | Accepted alongside CCS | Historically required for funded sites |
Data as of Nov 2026, based on SAE J3400 documentation and public automaker announcements. Power figures depend on specific vehicle and charger models.
NACS vs J1772 for AC Charging
For AC-only charging the comparison is simpler: J1772 is the incumbent AC connector in North America, and NACS carries the same single-phase AC capability in a smaller format. During the transition, AC wallboxes for the US market are specified either with a J1772 cable, a NACS cable, or J1772 plus an adapter strategy. The electrical side of the wallbox is identical — this is a cable-assembly decision, not a product redesign. Deeper J1772-family comparison lives in our J1772 vs CCS guide.
Automaker & Network Adoption Timeline
The adoption wave ran through 2023–2024: Ford and GM announced first, followed within months by most major brands selling in North America — Rivian, Volvo, Polestar, Mercedes-Benz, Nissan, Honda, Hyundai-Kia, Toyota, BMW group and others. Native NACS ports began appearing on new models from 2025, with adapter programs covering existing CCS1 vehicles. Major charging networks announced NACS cable rollouts in parallel.
Primary sources worth bookmarking: SAE J3400 standard page and automaker press releases — adoption details change frequently enough that order decisions should be checked against current announcements, not summaries.
What NACS Means for Charger Buyers & Importers
For a distributor or site developer ordering hardware today, the decision tree is short:
| Buyer situation | Recommended specification | Why |
|---|---|---|
| US public DC site, new build | Dual-cable: CCS1 + NACS | Serves the existing CCS1 fleet and the growing NACS fleet without adapters |
| US fleet depot, known vehicles | Match the fleet's inlet; confirm 2027+ replacement vehicles | Depot sites can single-standard if the fleet is uniform |
| US retail AC wallbox line | J1772 SKU now; NACS cable option on the same platform | Retail demand follows the installed vehicle base, which shifts gradually |
| Non-US markets | No change — CCS2 remains the standard | NACS is a North American transition; see CCS1 vs CCS2 for regional mapping |
The ordering mistake to avoid: treating NACS as a replacement that makes CCS1 hardware obsolete. The North American vehicle fleet will carry both inlets for years; single-standard public hardware is the risk, dual-standard is the hedge. Supplier-selection criteria for this transition are covered in our US-market supplier guide.
Our Multi-Standard Manufacturing Approach
Charging cabinets are built on a shared power-electronics platform; the connector standard is set by the cable assembly, inlet firmware parameters and compliance file configured at the production order. A US-bound cabinet can ship CCS1-only, NACS-only or dual-cable from the same platform — and a cabinet specified with replaceable cable assemblies can change the mix in the field later. This is why we ask every US buyer two questions before quoting: what does the site's vehicle mix look like today, and what is the replacement plan after 2027?
FAQ
Is NACS the same as the Tesla connector?
Physically yes — NACS is the standardized (SAE J3400) version of Tesla's connector, opened so any manufacturer can implement it against a documented specification.
Will CCS1 become obsolete?
Not in the near term. The installed CCS1 vehicle base is too large, and funded public sites have been required to serve it. Plan for a long dual-standard period.
Can one charger support both NACS and CCS1?
Yes — dual-cable DC chargers are the standard transition product. Confirm both cables' current ratings and the cabinet's power-sharing behavior when both are in use.
When do automakers switch?
Announcements clustered in 2023–2024; native NACS ports on new models from 2025 onward. Check the specific brand's current statement before committing fleet hardware.
Related SUNFULL pages
Planning US-market charger orders during the NACS transition?
Send your site type, vehicle mix and timeline. We confirm CCS1/NACS cable options, dual-standard configurations and certification scope before you commit.