Symptoms
- Charging takes much longer than expected
- Charging percentage barely moves over an hour
- Slower than usual at the same charger
- Worse in cold weather
Likely causes
- CommonUsing a lower-power charger than expectedA standard household outlet (Level 1) charges far slower than a Level 2 home charger or public fast charger.
- CommonCold battery temperatureBatteries accept charge more slowly when cold, and the car may actively limit charging speed to protect the battery.
- PossibleCharging limit set low in the car or appSome cars slow down as they approach a set charge limit to protect long-term battery health.
- PossibleShared power at a public charging stationSome fast chargers split power between multiple simultaneous users, slowing each car down.
What to do
- Confirm what type of charger you're using (standard outlet, home Level 2, or public fast charger) and compare against its expected charging speed.
- Check the car's app or dashboard for the current charging speed in kW and compare to the charger's rated output.
- If it's cold outside, understand that slower charging in freezing temperatures is normal and often intentional to protect the battery.
- Check your charging settings for a maximum charge percentage or scheduled slow-charge setting.
- At public fast chargers, check if other cars are charging at adjacent stalls sharing the same power cabinet.
- If charging is slow only on one specific charger, try a different one to compare.
When to call a pro
If charging is consistently slow on multiple known-good high-power chargers in mild weather, have a dealer check the car's onboard charger.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.