EV chargers fail occasionally. Mid-session failures are particularly frustrating because you’re committed to charging at that location and the failure leaves you in an awkward state — partially charged, possibly with a stuck cable, possibly with billing uncertainty.
This article walks through what to do when it happens, in order of likely effectiveness.
First moments: understand what happened
When a session stops unexpectedly, the first response is to understand what just happened.
Check sources of information:
Your car’s display. Most EVs show charging status. “Charging stopped” with a reason.
The charger’s display. Many chargers show error messages or status.
Your network’s app. Usually shows real-time session status with reasons.
The cable. Is it physically still connected? Did someone unplug it?
A few common causes you might find:
- Vehicle full. You hit your target SOC; charging completed normally.
- Charger faulted. Internal error; reported on display.
- Connection lost. Network or pilot pin issue.
- Payment timeout. Some sessions auto-end after time limits.
- Temperature throttle. Charger or battery too hot.
- Authorization expired. Long sessions sometimes need re-auth.
Knowing the cause guides your next move.
flowchart TD
A[Session stopped] --> B[Check car<br/>charger and app]
B --> C{Cause?}
C -->|Vehicle full| D[Normal<br/>unplug and go]
C -->|Charger fault| E[Unplug wait<br/>then reseat]
C -->|Connection lost| F[Reseat cable<br/>restart]
C -->|Payment or auth| G[Re-authorize<br/>restart]
E --> H{Restarts?}
F --> H
G --> H
H -->|Yes| I[Continue<br/>charging]
H -->|No| J[Try another<br/>charger or call support]
style D fill:#dcfce7,stroke:#16a34a
style I fill:#dcfce7,stroke:#16a34a
style J fill:#fee2e2,stroke:#dc2626If the session stopped due to vehicle full
Not a failure. Just done. Unplug, move on.
If the session stopped due to charger fault
A few things to try.
Unplug and reseat. Many transient faults clear when you unplug and replug.
Wait 30-60 seconds before reseating. Gives the charger time to reset.
Try a different stall. If multiple stalls exist, the problem may be that specific stall.
Restart via your app. Some apps let you trigger a session restart remotely.
Check next-charger options. If multiple attempts fail, move to a different charger if available.
If the session stopped due to connection issue
The cable came out, was tampered with, or signal was lost.
Re-seat the cable. Make sure it’s fully seated.
Verify visually. Check for damage to cable or connector.
Restart the session. Plug in fresh, authorize again.
If the session stopped due to payment / auth issue
Some networks auto-end sessions after maximum time or maximum cost.
Check your account. Are you over a limit?
Re-authorize and restart. Often works.
Try a different payment method. Some chargers accept cards in addition to app-based auth.
If the session won’t restart at all
Time to escalate.
Try a different charger. A nearby site may work.
Contact network support. Have your information ready (charger ID, your account, what you tried).
Note: if you have low SOC and limited options, this is when contingency planning matters.
The “stuck cable” scenario
A common variant: session ended, but the cable won’t release.
Check the charger display. Some require you to acknowledge end-of-session.
Try the app’s “release cable” feature. Many networks have this.
Try unplugging from the car side first. Often releases more easily than the charger side.
If nothing works, call support. They can trigger UnlockConnector remotely.
Don’t yank the cable hard. Risk of damage to expensive equipment.
This is the OCPP UnlockConnector flow from the back-end perspective. From your perspective, support handles it.
What if you’re stuck with low SOC?
The worst-case scenario. You arrived with 5% SOC, the charger failed, you can’t restart, no nearby alternatives.
Stay calm. This rarely is unfixable.
Find the nearest other charger. Apps like PlugShare or your network’s app show nearby options.
Conserve range to reach it. Slow speed, no heat/AC, no aggressive driving. You can stretch range significantly when needed.
Last resort: tow. AAA and similar memberships often include EV-out-of-charge coverage. Cheap insurance for road-trippers.
Last-last resort: a Level 1 outlet. Many businesses have outlets you might use for an hour to add enough range to reach a fast charger. Ask politely. It is slow — see Level 1 vs Level 2 vs DC fast charging for what an hour on a wall outlet actually buys you — but even a few miles can bridge the gap.
Billing after a failed session
A few notes on how billing typically works.
Energy delivered, you pay for. Most networks bill based on actual kWh delivered. A failed session typically bills only for what was delivered before the failure.
Idle fees: if a session “ends” (no current flowing) but you’re still connected, some networks may apply idle fees. The intent is to prevent camping, but if the session ended through fault, you may dispute.
Reservation fees: if you reserved the stall and the failure was the network’s fault, you can usually dispute.
Check your statement. Sometimes errors happen; review and contest if needed.
Contesting: most networks have customer service that adjusts incorrect charges. Be polite, factual, have records (timestamps, error messages).
When the network is reliable but the charger isn’t
A pattern I’ve seen: someone has bad experiences with a specific network and assumes EV charging is broken.
Reality: networks have wide reliability differences. A bad experience at one network doesn’t predict the next.
Diversify network accounts. Have access to multiple networks — for example Electrify America, EVgo, ChargePoint, Tesla/Supercharger and Flo in North America, or Ionity, Fastned and Allego in Europe. Different reliability profiles cover each other’s gaps.
Use PlugShare for charger-specific reviews. A specific charger may have a bad reputation that the network at large doesn’t.
Report issues. Don’t just walk away. Reporting helps the network fix it and helps the next user know. Flagging a broken stall is also part of being a good citizen at a shared site — see public EV charging etiquette (coming soon).
Preventive habits
A few habits that reduce mid-session failure exposure.
Don’t run battery too low before charging. Aim to arrive at chargers with 15-25% SOC. Less stress; more options if the first charger fails.
Choose well-rated chargers. PlugShare reviews are informative. A 4.5-star charger is much more likely to work than a 2.5-star.
Prefer larger sites. 8 stalls vs 2 stalls = much less risk of zero working chargers.
Verify before committing. When you arrive, confirm the charger is operational before connecting. Some networks show real-time stall status in their app.
Have a backup plan. Know the next nearest charger before your session starts. On longer trips, building this into your route ahead of time is worth it — the EV road trip planning guide (coming soon) covers how to sequence stops with fallbacks.
Carry an adapter. A NACS-to-CCS1 adapter (or vice versa) opens up the broader network if your primary fails.
What network operators are doing about reliability
A few trends.
Uptime targets. NEVI funding requires 97% uptime per stall per quarter. Networks are investing in monitoring and maintenance to hit this.
Better monitoring. Newer chargers self-report issues. Operators detect problems faster.
Automated remediation. Some issues resolve automatically (reset on detection of stuck state, etc.).
Customer support investment. 24/7 phone support is increasingly standard.
User-facing transparency. Real-time stall status in apps. Networks that don’t have this are increasingly seen as inferior.
The reliability of EV charging has improved meaningfully over the past 5 years. Continued improvement is expected.
The honest summary
Mid-session charger failures happen, but they’re rarely catastrophic. The first response is to understand what happened (check displays, app, cable). The second is usually to unplug, wait, and restart. The third is to try a different charger. Most situations resolve quickly. The rare cases that don’t resolve quickly are why backup planning matters (alternate chargers, adapter for cross-network access, AAA membership). Keep your cool, have a plan B, and the EV charging system is reliable enough for normal use.