Why Did My EV Stop Charging Midway?

Your EV was charging normally, then it just stopped, partway through, without warning. The car is still plugged in, but the charging indicator stopped moving. This is one of the most frustrating EV charging problems because it happens silently while you sleep. This guide explains every reason EV charging stops midway and how to get it going again.

This guide is part of our EV charging problems section. For the full charging checklist, see EV Charging Troubleshooting: 10 Most Common Problems Solved.

Short Version

EV charging most commonly stops midway because of a temporary communication error between the EVSE and the car’s BMS, a thermal event where the battery or charger got too hot, the charge limit was reached (e.g., the car was set to charge only to 80%), or the EVSE lost power from a tripped breaker or GFCI. Unplug, wait 2 minutes, and replug, this fixes the majority of mid-charge stops.

Why EV Charging Stops Midway

Reason 1: Charge limit reached

This is the most common “problem” that’s actually not a problem. If you set the car to charge to 80% and it stopped at 80%, that’s exactly correct behavior. Many owners forget they set a charge limit. Check your app or car settings to confirm what the charge limit is set to. If it’s set to 80% and you want 90%, simply raise the limit and charging will resume.

Reason 2: Communication error between EVSE and BMS

The EVSE and car communicate through the J1772 pilot signal, a continuous handshake that authorizes charging. If this signal is interrupted by a momentary power fluctuation, a firmware glitch in the EVSE, or a BMS timeout, charging stops. The car may show no error, it just stopped. Unplugging and replugging typically restores the handshake and charging resumes.

Reason 3: Battery temperature exceeded safe limit

If the battery got too hot during charging, which can happen during DC fast charging or in very hot weather, the BMS pauses charging to protect the cells. This is a safety feature, not a failure. The car will resume charging automatically once the battery cools to a safe temperature. You may see a “Charging paused: Battery temperature” or similar message.

Reason 4: EVSE overheated or tripped thermal protection

The EVSE itself has thermal protection. In hot environments, a garage in summer, direct sun on the unit, the EVSE can overheat and pause charging to protect itself. The EVSE will resume once it cools down. If this happens repeatedly, check whether the EVSE is in direct sunlight or a poorly ventilated space and consider relocating it or shading it.

Reason 5: Tripped breaker or power interruption

A momentary power outage, a voltage spike, or a tripped circuit breaker will cut power to the EVSE and stop charging. The EVSE may not restart automatically after power is restored, some units require a manual reset or for the cable to be unplugged and replugged. Check your breaker panel for a tripped breaker if charging stopped and the EVSE shows no power.

Reason 6: Software timeout or BMS fault

Some EV software versions have a known bug that causes charging to stop at a specific percentage (commonly 75%, 80%, or 90%) due to a BMS timeout error. This is often seen as an intermittent issue, most charges complete normally but occasionally one stops early. Check owner forums for your car model and software version. This type of bug is typically fixed in an OTA update.

Reason 7: Scheduled departure time conflict

On some EVs, if a departure time and charge limit are both set, the car will stop charging once it determines it has enough charge to reach the departure target, even if that’s less than the charge limit. This can appear as charging stopping early for no obvious reason. Check whether a departure time is set in the app or car settings.

Reason 8: Ground fault detected by GFCI

The EVSE continuously monitors for ground faults. If it detects even a tiny difference in current between the hot and neutral conductors, it trips its internal GFCI and stops charging. This can be triggered by transient electrical events in your home wiring or by a developing fault in the EV’s onboard charger. Frequent GFCI trips during charging should be investigated by an electrician.

How to Fix It

Fix 1: Check and raise the charge limit

Open the app or car settings. Verify the charge limit. If it stopped at exactly the charge limit percentage, raise the limit to your desired level and tap “Start Charging.” This is the fix in a large percentage of “stopped midway” reports.

Fix 2: Unplug and replug

Disconnect the cable from the car, wait 2 minutes, then reconnect. This resets the J1772 pilot handshake between the EVSE and the car’s BMS. Most communication-error stops resolve with this step alone. If the car resumes charging normally, no further action is needed, but note whether it keeps stopping at the same percentage, which would indicate a software bug worth reporting.

Fix 3: Reset the EVSE

Flip the EVSE’s breaker OFF for 30 seconds, back ON. Wait 60 seconds for the EVSE to restart, then plug in again. This clears any internal EVSE fault that may have stopped the session.

Fix 4: Wait for the battery to cool

If charging stopped due to battery temperature, wait 20–30 minutes and try again. If the car is in a hot environment, move it to a cooler location or open garage doors to improve ventilation. Don’t force charging to restart on an overheated battery, the BMS will simply stop it again.

Fix 5: Check and update software

If charging stops at the same percentage repeatedly and none of the above explains it, check whether a software update is available. Many charging stop bugs are documented and fixed in OTA updates. Install any pending updates and retest.

How to Know Why It Stopped

Most EVs log the reason charging stopped. Check these locations:

If charging stops because of the plug or cable rather than the car, see charging error code 26.

Tesla app: Energy → Charging → last session details
Hyundai Bluelink / Kia Connect: Charging history in the app
Ford FordPass: Charging history and session details
Chevy myChevrolet: Energy Assist → Charging history
OBD2 scanner: Check for fault codes stored at the time of the stop

When to Contact a Dealer

Contact a dealer if charging consistently stops at a specific percentage despite raising the charge limit; if an OBD2 scan shows charging fault codes; if the EVSE trips its ground fault protection every time you plug in this specific car (suggests the car’s onboard charger has a ground fault); or if a “Charging Fault” warning appears in the app each time it stops.

FAQs

My EV always stops charging at exactly 80%: why?

Your charge limit is set to 80%. This is the factory default on many EVs to protect long-term battery health. Go into your charging settings and raise the limit to whatever percentage you want, 90% for daily use, 100% before long trips. The car will then charge to that level.

Charging stopped at 65% last night and the app shows no reason: what happened?

A communication error between the EVSE and car most likely caused this. The car considers this a normal end of session from its perspective, no fault is logged because from the BMS’s view, the session simply ended. Try unplugging and replugging to restart. If it happens repeatedly at similar percentages, get the EVSE and car’s charging log checked, there may be a pilot signal stability issue with your home wiring.

Bottom Line

Charging stopping midway is almost always caused by the charge limit being reached, a communication error between the EVSE and car, or a thermal event. Check the charge limit first, it’s the answer in most cases. If charging stopped before the limit, unplug and replug to reset the handshake. Keep software updated to fix known charging stop bugs. Only pursue a dealer visit if charging consistently stops at the same percentage despite the charge limit being set higher and no thermal or software explanation fits.

Why Did My EV Stop Charging Midway