EV Charging Troubleshooting Guide

Charger Won't Start

This is the most common issue. You plug in and the charger just sits there. Before assuming it is broken, try these steps in order.

• 1. Check the connector is fully seated. Push the plug in until it clicks. A loose connection is one of the most common reasons a session does not start. Never force a connector.
• 2. Open your car's charge port. If the charge port flap is closed, the connector cannot go in. Press the flap, use the key fob, or check the car's touchscreen to open it.
• 3. Try authenticating again. Tap your RFID card or restart the app session. Payment authorization sometimes fails silently. Wait 10 seconds and try again.
• 4. Unplug and replug. Disconnect completely, wait 30 seconds, then reconnect. This resets the handshake between car and charger.
• 5. Try the other connector. Many DC fast chargers have two cables (CCS and CHAdeMO). If one does not work, the other might. On multi-stall stations, try a different stall.
• 6. In cold or wet weather, check the pins. Ice, snow, or moisture on the connector pins or your car's charge port can cause poor contact or communication errors. Wipe the pins dry, clear any ice from the port, and make sure the plug clicks in firmly.
• 7. At large hubs, look for the Central Payment Kiosk. At newer European charging hubs (especially Allego, EnBW, TotalEnergies, Zunder, and Kempower setups), the individual chargers may have no screen or card reader. Look for a standalone terminal or totem in the middle or at the end of the row. Plug in first, note your stall number, then walk to the kiosk to select your stall and tap your card. The charger is not broken, it is just controlled from the central kiosk.

Common Error Messages

Charger error messages are often vague and unhelpful. The same underlying problem can show different messages depending on the charger brand. Here are the most common ones and what they actually mean.

Charging Started but Stopped Early

This is more confusing than a charger that never starts, because something clearly worked and then stopped. The cause is usually one of these four things.

• → Battery reached its charge limit. If you set a charge limit (e.g. 80%), the car will stop on its own. Check your car's settings.
• → The car's battery is too hot or too cold. Extreme temperatures cause the car to reduce or stop charging to protect the battery. This is normal. Wait for the battery to reach a better temperature.
• → Charger hit a time or kWh limit. Some public chargers have session limits (e.g. 60 minutes or 50 kWh). Check the charger's terms on the screen or app.
• → Power sharing reduced your speed to zero. Some stations share power between stalls. If multiple cars are charging, your speed might drop significantly or stop. This is rare but it happens.

Charging Is Slower Than Expected

You plugged in and charging started, but the speed shown on the charger or your car's dashboard is much lower than the charger's rated maximum. This is usually normal, not a fault.

• → Charging slows naturally above 80%. Your car's charging curve tapers the speed as the battery fills up. Going from 10% to 80% is fast. Going from 80% to 100% is deliberately slow to protect the battery. This is normal behavior, not a charger fault. For more detail, see why charging slows after 80%.
• → A cold battery charges slowly. If you have been driving in cold weather or the car has been parked for hours, the battery may be too cold for fast charging. Many EVs have a preconditioning feature that warms the battery while you drive to the charger. Use it. If your car does not precondition automatically, expect slower initial speeds that improve as the battery warms up during the session.
• → Your car's max speed may be lower than the charger's. A 350 kW charger does not mean your car will charge at 350 kW. The car determines the speed, not the charger. A car rated for 135 kW max DC will only draw 135 kW even on a 350 kW charger. Check your car's specs.
• → Power sharing at busy stations. Some multi-stall stations share a total power budget between chargers. If three cars are charging, each may get less than the rated per-stall maximum. This is common at older 50 kW sites and at some newer hubs during peak times.
• → Voltage architecture mismatch. A 400V car on an 800V-optimized charger (or vice versa) may charge at reduced speed. Some chargers handle the conversion internally, others do not. This is a technical limitation, not a fault.

Payment and Authentication Problems

Payment failures are the second most common charging problem after connector issues. The charger may show "authorization failed," decline your card, or simply not respond to your RFID tap.

• → Pre-authorization holds can block your card. Many DC fast chargers place a hold of 50-100 EUR on your card before charging starts. If your card has a low limit or the bank flags it, the hold fails silently. Try a different card or ensure your bank allows pre-authorization holds.
• → RFID cards may not work on every network. Roaming agreements between networks change. If your usual RFID card is rejected, try the network's own app or a contactless credit card instead.
• → The app may say "started" but the charger did not receive it. Network delays between the app and the charger are common. If the app shows a session running but no power is flowing, stop the session in the app, wait 30 seconds, and try again.
• → Keep 2-3 charging apps installed. No single app covers every charger. Having backup options means you are never stuck because one network's payment system is down.
• → Don't see a card reader? Look for the Central Payment Kiosk. At many newer European charging hubs, the card terminal is not on each charger. Instead, there is a single payment kiosk (a standalone terminal or totem) for the entire site. Plug your cable in first and wait for the handshake to complete. Then walk to the kiosk, select your stall number on the screen, and tap your card. Trying to pay before plugging in usually does not work, as the kiosk needs to see your car connected.
• → Under EU AFIR rules, most fast chargers above 50 kW accept bank cards. If you are at a newer station, try tapping your contactless debit or credit card directly at the charger or at the central kiosk. You do not always need an app. However, some older chargers still require a specific app or RFID card, so keep your apps as backup.

Who to Contact

If you have tried the basics and the charger still does not work, you have a few options.

• → Call the number on the charger. Every public charger should have a support phone number on it. Call and report the issue. They can sometimes reset the charger remotely.
• → Use the charging network's app. Most apps have a "report a problem" button for each charger. This flags the issue for other drivers too.
• → Check community apps. Apps like PlugShare let users leave real-time status updates. Check if others have reported the same charger as broken.
• → Find the nearest alternative. Open your preferred charger map app (or try Open Charge Map for a free, community-maintained directory) and filter by available chargers. Do not wait at a broken charger hoping it will fix itself.

Charger Blocked or Occupied

You arrive at the charger and someone else is parked there, either still charging or just sitting in the spot. This is increasingly common at busy locations.

• → Non-EV vehicles in charging spots (ICEing). Petrol or diesel cars parked in EV charging bays is a common frustration, especially at shopping centers and urban locations. In many European countries, this is now subject to fines, but enforcement varies. If it happens, find an alternative charger rather than waiting.
• → EVs still plugged in after finishing. Some drivers leave their car plugged in long after charging completes, blocking the spot. Many networks now charge idle fees after a grace period (typically 5-15 minutes) once the battery is full. If you are the one charging, set a reminder to move your car when the session ends.
• → All stalls occupied with active sessions. At busy motorway hubs, all stalls may be in use. Check the network app for estimated wait times. Some apps show how long each car has been charging, which helps you decide whether to wait or move to the next station.

Charging in Rain, Snow, and Extreme Weather

Public DC fast chargers are designed to be used outdoors in all weather conditions. Charging in rain or snow is safe on properly installed chargers. A few things to be aware of:

• → Keep connections dry if possible. While the connectors are weatherproof, wiping moisture from the pins before plugging in can prevent occasional communication errors. In heavy rain, shield the connector during the plug-in.
• → Clear ice from the charge port. In freezing conditions, ice can form around the charge port lid or inside the port itself. Clear it before attempting to plug in. Some EVs have a charge port heater that activates during preconditioning.
• → Heavy DC cables at some sites. Liquid-cooled DC cables at ultra-rapid chargers are thick and heavy. At some older or tighter European forecourts, the cable may not reach your port easily depending on how you parked. Reposition the car if needed.
• → Cold weather slows charging. A cold battery accepts charge more slowly. If you are on a road trip, use your car's battery preconditioning feature while driving to the charger. This warms the battery so it can charge at full speed when you arrive.

When the Problem Might Be Your Car

Most charging problems are caused by the charger, the payment system, or the connection. But occasionally, the issue is on the car's side.

• → Same error at multiple unrelated chargers. If the same communication error or failed handshake happens at different chargers from different networks, the problem is likely your car's charging hardware or software, not the chargers. Check if a software update is available for your vehicle and contact your dealer if the issue persists.
• → Your car's charge port light shows an error. Most EVs use the charge port light to signal status. A red or flashing light after plugging in usually indicates the car rejected the connection. Check your car's manual for what the specific light pattern means.
• → Restart the car's infotainment system. Some charging communication issues can be resolved by restarting the car's computer. The method varies by manufacturer, but usually involves holding two buttons on the steering wheel or using a menu option. This resets the charging protocol without affecting the battery.

How to Avoid Getting Stuck

• → Always have a backup charger location. Before you leave, know where the next nearest charger is. Do not rely on a single station, especially on road trips.
• → Keep multiple charging apps and payment methods. Some chargers only accept specific networks. Having 2-3 charging apps covers most situations.
• → Do not wait until you are nearly empty. Charge when you can, not when you must. Arriving at a broken charger with 5% battery is stressful. Arriving with 30% gives you options.
• → Precondition your battery on road trips. If your car supports it, set the charger as your navigation destination. Most modern EVs will warm the battery automatically while driving, so you arrive ready to charge at full speed.
• → Carry a portable Level 1 charging cable. In an emergency, you can plug into any standard household outlet. It is slow (5-8 km of range per hour) but it can get you to the next working charger.

Most charging problems have a simple fix. The pattern is almost always the same: check the connector, check the payment, try a different stall or a different charger. Once you have been through it a few times, it stops being stressful.

For more specific scenarios, the EVcourse app covers real-world charging scenarios with step-by-step solutions. Pick your problem, follow along, and get back on the road. For a broader overview of how EVcourse helps, see why every EV driver needs EVcourse, or start with our guide to electric car charging made simple.