Vehicle interoperability between EVs and charging infrastructure is crucial for seamless charging experiences. With over 1.4 million EVs sold in the U.S. in 2023 and more than 50 different models available, implementing standardized practices has become essential for the industry's growth.

EVgo's Innovation Lab conducts extensive interoperability testing with automakers and equipment manufacturers to enhance charging reliability. Here are the key best practices for improving EV charging experiences:

Authentication Time Extension

• Current standard: 60 seconds
• Recommended: 150 seconds (2.5 minutes)
• Benefits: Gives drivers adequate time to initiate charging sessions
• Improves first-time success rates for new and existing users

Seamless Session Retry

• Vehicles should attempt connection sequence at least 5 times
• Helps correct common errors without unplugging
• Improves overall charging success rates
• Reduces user frustration

EVCCID and MAC Address Matching

• Ensures proper Autocharge+ functionality
• Enables automatic vehicle recognition
• Supports future Plug & Charge technology
• Requires unique MAC addresses for each vehicle

Standardized Port Locations

• Current situation: 5 different possible locations
• Challenges: Requires longer, heavier cables
• Benefits of standardization:
  • Simplified station design
  • Improved accessibility
  • Enhanced user experience
  • Reduced cable wear and tear

These best practices support:

• Increased charging efficiency
• Better accessibility
• Enhanced user experience
• Accelerated EV adoption
• Achievement of national electrification goals

The industry continues to work together through organizations like CharIN, ChargeX Consortium, and international standards bodies to improve the charging experience for all EV drivers.

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