Question 1

What is J3400/NACS and why does it matter for parking lots?

Accepted Answer

SAE J3400 is the industry standard name for what was originally Tesla's NACS (North American Charging Standard) connector. In 2025, SAE published it as the open standard for EV charging in North America. Every major automaker — Tesla, Ford, GM, Rivian, Hyundai, BMW — has adopted or announced adoption of J3400. For parking lot owners, this means one connector type will serve virtually all EVs, simplifying equipment decisions and eliminating the risk of connector obsolescence.

Question 2

Should I install J3400 or CCS chargers today?

Accepted Answer

Install J3400/NACS-native chargers. All new vehicle models are transitioning to J3400. CCS vehicles can charge at J3400 stations using adapters (which cost $150–$200 and most networks provide). Installing CCS-only hardware means your chargers will become legacy equipment within 2–3 years as the fleet transitions.

Question 3

What about existing CCS chargers — do I need to replace them?

Accepted Answer

Not necessarily. Existing CCS chargers remain functional and can serve CCS vehicles for years. Many operators choose a hybrid approach: keep existing CCS units operational while deploying new J3400-native chargers. Dual-standard chargers with both connectors are also available, though they cost 15–25% more than single-standard units.

Question 4

How much does it cost to upgrade to J3400 chargers?

Accepted Answer

For new installations, J3400-native Level 2 chargers cost $3,000–$8,000 per port. DCFC units with J3400 range from $50,000–$150,000. For existing CCS charger sites, adding J3400 adapter cables costs $1,000–$3,000 per unit. Full charger replacement is only recommended if existing units are more than 5 years old or have reliability issues.

Question 5

How does Wins Parking guide equipment selection?

Accepted Answer

We evaluate each property based on vehicle mix (what EVs currently visit), dwell time patterns, electrical capacity, budget, and long-term goals. We recommend J3400-native equipment for all new installations, dual-standard units where CCS coverage is still needed, and adapter strategies for existing CCS infrastructure. Our vendor relationships ensure competitive pricing and warranty support.

NACS / J3400 Charging Upgrades for Parking Lots