As electric vehicle adoption accelerates across North America, the performance of public charging infrastructure has emerged as a decisive factor in consumer confidence. While vehicle technology has matured rapidly, the charging experience remains inconsistent—highlighting a stark contrast between Tesla’s Supercharger network and the fragmented systems serving other automakers.
Tesla’s proprietary network has earned a reputation for near-flawless reliability and straightforward operation. In contrast, drivers of non-Tesla EVs must navigate a patchwork of providers, each with distinct authentication protocols, pricing models, and user interfaces. This complexity can erode trust, particularly among new buyers. Ford CEO Jim Farley underscored the issue, stating, “Mass consumers who have a lot of charging anxiety. They don’t have range anxiety; they have charging anxiety.”
Data from J.D. Power in Q1 2023 quantified the challenge: 20.8 percent of EV drivers using public charging stations encountered failures or malfunctions that prevented charging. A separate survey in the San Francisco Bay Area found nearly one-quarter of stations inoperative due to issues such as unresponsive screens, payment system breakdowns, charge initiation failures, network outages, or damaged connectors.
A recent national study, part of the Electrification 2030 white paper by the Electrification Institute, provides granular insight into failure modes. Based on monitored network data, the leading causes of unsuccessful charging sessions were:
• Station connectivity problems: 55 percent
• Internal station faults or errors: 38 percent
• Connector or cable issues: 4 percent
• Credit-card reader failures: 1 percent
• Display screen malfunctions: 1 percent
Connectivity failures dominate the statistics. Most public chargers rely on cellular links for network authentication, making them vulnerable to the same coverage gaps and signal instability familiar to mobile phone users. Best practice dictates that stations default to free charging when connectivity is lost, a policy Electrify America reports it follows. Alternatively, hard-wired communication lines offer greater reliability but at significantly higher installation costs, limiting their deployment.
Internal faults form the second largest category, encompassing both software and hardware breakdowns. Instances of stations frozen mid-reboot, sometimes displaying recognizable operating system code, point to diverse underlying problems. These require tailored solutions across different manufacturers and models, adding complexity to maintenance.
Other causes—such as malfunctioning payment terminals or display screens—are comparatively rare. Nonetheless, they can still interrupt service, and high-profile criticism has come from Tesla CEO Elon Musk, who has resisted public funding tied to requirements for alternative payment methods beyond app-based systems.
Despite these issues, many charging networks cite uptime figures exceeding 97 percent. However, if uptime is measured solely by a station’s ability to respond to a remote ping, such metrics may misrepresent real-world usability. A station might be “online” yet unable to process payments or deliver power at the expected rate.
Regulatory intervention may shift industry practices. California’s AB 2061, enacted in 2022, mandates that operators receiving state funds comply with enhanced reporting and record-keeping standards. The California Energy Commission is expected to finalize these requirements, and states aligned with California’s emissions policies are likely to adopt similar measures.
Automaker frustration with inconsistent charging reliability has already spurred strategic moves. In May, Ford announced that its EV customers would gain access to Tesla’s Supercharger network and that it would adopt Tesla’s connector standard. GM made a similar commitment weeks later, followed by other manufacturers. In July, seven automakers revealed plans for a joint venture to deploy over 30,000 fast-charging stations nationwide, incorporating amenities to improve the user experience.
Ultimately, understanding the root causes of charging failures—whether network connectivity lapses, internal system errors, or hardware degradation—offers a roadmap for improvement. The challenge lies in execution: prioritizing preventive maintenance, rapid fault resolution, and robust oversight. Tesla’s example demonstrates that consistent operational discipline can transform charging from a potential liability into a competitive advantage.