Tesla Model S Charging at Mer

Tesla Model S Charger Will Not Start a Session

You plugged in your Model S and nothing is happening. No green light on the charge port, no animation on the 17-inch touchscreen, just silence. Whether you are at a Supercharger, a third-party CCS2 station, or a home wallbox, there are a handful of common reasons the session will not begin.

Symptoms

• Charge port LED stays white or flashes red after plugging in the connector
• 17-inch touchscreen shows no charging animation or displays an error message
• Supercharger stall makes a click but does not begin delivering power
• CCS2 connector at a third-party station locks in but charging never starts
• Tesla app shows 'Not Charging' even though the cable is connected

What to Do

1. 1

   Check the charge port LED color

   Walk to the left rear of the car and look at the charge port light. White means ready but not connected. Blue means communicating. Green means charging. Red or amber means there is a fault. If it is white with the cable plugged in, remove and reseat the connector firmly.

2. 2

   Unplug and replug the connector

   Remove the connector completely, wait five seconds, then reinsert it until you hear the latch click. On CCS2 connectors, make sure both the top (AC pins) and bottom (DC pins) sections are seated properly.

3. 3

   Check for scheduled charging on the touchscreen

   On the 17-inch touchscreen, go to Controls, then Charging. If scheduled charging is active, you will see the planned start time. Tap to disable it or select 'Charge Now' to override the schedule.

4. 4

   Authorize the session at non-Tesla chargers

   At third-party CCS2 stations, check whether the charger requires you to start the session through an app, RFID card, or contactless payment. Plug & Charge works at supported stations, but many still require manual authorization.

5. 5

   Try a different stall or charger

   If you are at a Supercharger, move to a different stall. If you are at a third-party station, try the other connector. A faulted charger looks identical to a working one from the outside.

6. 6

   Restart the touchscreen

   Hold both scroll wheels on the steering wheel for about 10 seconds until the 17-inch touchscreen goes black and reboots. This resets the charging controller and fixes some communication glitches. The car stays on during the reboot.

Tesla Model S Payment Failed at Charging Station

You are plugged in and the charger is waiting for payment, or the Supercharger session will not start because of a billing issue. Payment problems are one of the most common reasons drivers get stuck at chargers, and the Model S has multiple ways to pay depending on where you are charging.

Symptoms

• Supercharger session will not start and the Tesla app shows a payment error
• Third-party CCS2 charger displays 'Authorization failed' after tapping your card
• RFID card is not recognized by the charger's reader
• Plug & Charge does not activate at a supported station
• Contactless bank card is rejected by the charger's payment terminal

What to Do

1. 1

   Check your Tesla account payment method

   Open the Tesla app on your phone. Go to Account, then Payment. Verify your credit card is current and has not expired. If the card was replaced, update the details. Supercharger sessions will not start without a valid payment method on file.

2. 2

   Try a different payment method at the charger

   If your RFID card failed, try contactless with your bank card or phone. If contactless failed, try the charger operator's app. Having at least two payment methods gives you a backup when one does not work.

3. 3

   Scan the charger QR code for browser payment

   Most public chargers have a QR code on the unit. Scanning it with your phone opens the operator's payment page in your browser. You can usually pay with a credit card directly without downloading their app.

4. 4

   Check your banking app for blocked transactions

   Open your banking app and look for flagged or declined transactions. Some banks require you to approve the charge manually. Approve it and retry the payment at the charger.

5. 5

   Try Plug & Charge by replugging

   If the charger supports Plug & Charge, unplug the CCS2 connector from your Model S, wait a few seconds, and replug. Payment should authorize automatically through the cable. This only works if your Tesla account has Plug & Charge enabled and the charger supports ISO 15118.

6. 6

   Move to a Supercharger or a different station

   If you cannot resolve the payment issue, find a Tesla Supercharger using the nav on the 17-inch touchscreen. Supercharger billing is handled entirely through your Tesla account, bypassing third-party payment systems.

Tesla Model S Charging Slower Than Expected at Charger

You pulled into a Supercharger expecting 250 kW and the 17-inch touchscreen shows 80 kW. Or your home wallbox is crawling at 3 kW instead of 11 kW. The Model S has one of the fastest charging curves on the road, but reaching peak speed depends on battery temperature, state of charge, and a few settings you can check in under a minute.

Symptoms

• DC fast charging power well below 250 kW on the touchscreen despite a rated charger
• AC home charging stuck at 3-4 kW instead of the expected 11 kW on 3-phase
• Charging speed drops sharply after 40-50% on the touchscreen during DC fast charging
• Supercharger shows significantly lower kW than neighboring stalls
• Non-Tesla CCS2 charger delivers far less power than its rated maximum

What to Do

1. 1

   Check if the battery was preconditioned

   On the 17-inch touchscreen, tap the charging icon. If you see a snowflake icon or a message about conditioning, the battery was not warm enough when you arrived. Next time, navigate to the charger using Tesla nav at least 20-30 minutes before arrival so preconditioning kicks in automatically.

2. 2

   Check your current state of charge

   If you are above 50%, the slower speed is expected on the 95 kWh NCA pack. Peak power happens roughly between 5-30%. For the fastest charging stops on a road trip, arrive between 10-20%.

3. 3

   Move to an unpaired Supercharger stall

   Look at the stall numbers. If they are labeled in A/B pairs (3A/3B, 4A/4B), pick a stall where the paired stall is empty. At V3 or V4 Superchargers with the Magic Dock or the new V4 cable, this is not a concern.

4. 4

   Check the AC charge current limit on the touchscreen

   Go to Controls, then Charging on the touchscreen. Look for the charge current setting. Make sure it is set to the maximum amperage. This only affects AC charging at home or destination chargers, not Supercharging.

5. 5

   Try a different charger or stall

   If speeds remain low, the charger hardware may be degraded. Try another stall at the same location. On non-Tesla CCS2 stations, check the charger display for error codes or reduced power notices.

6. 6

   Check for a Tesla software update

   Go to Controls, then Software on the touchscreen. If an update is pending, install it. Tesla has adjusted charging curves through over-the-air updates in the past, sometimes improving peak speeds.

Station occupancy not updating in the app

The Mer app shows a station as available, but when you arrive, all connectors are occupied or out of service. The real-time status in the app can lag behind by several minutes.

Symptoms

• App shows "Available" but all connectors are in use when you arrive
• App shows a station as occupied but the chargers are visibly free
• Connector status flickers between available and occupied in the app
• Recently freed connectors still show as "In use" in the app for several minutes

How to Fix It

1. 1

   Pull to refresh the station detail in the Mer app

   On the station page, pull down to force a status refresh. The app does not always update automatically, and a manual refresh often shows the correct status.

2. 2

   Close and reopen the app

   Force-close the Mer app and reopen it. This clears any cached station data and pulls a fresh status from the server.

3. 3

   Check a third-party app for a second opinion

   Apps like Plugsurfing, A Better Route Planner, or Google Maps sometimes pull fresher data from Mer's backend. Use one of these to verify availability if the Mer app seems wrong.

4. 4

   Drive to the station if it is nearby

   If the station is less than five minutes away, it is often faster to just go and check. Occupancy can change in the time it takes to troubleshoot the app.

Third-party RFID card rejected

You are trying to authenticate with an RFID card from a roaming provider like Plugsurfing, NewMotion, or Virta, but the Mer charger rejects it. Not all third-party RFID cards are accepted at every Mer station.

Symptoms

• Charger screen shows "Card not recognized" after tapping
• The charger beeps once but nothing happens
• Your RFID card works at other networks but fails at Mer
• The charger prompts you to try again but repeated taps do not help

How to Fix It

1. 1

   Hold the card flat against the reader for three full seconds

   Do not tap and remove quickly. Some Mer readers need a longer hold to register the card. Keep it pressed flat against the RFID symbol.

2. 2

   Check if your roaming provider covers Mer stations

   Open your roaming provider's app and search for this specific Mer station. Some providers have roaming agreements with Mer but not for every station type or region.

3. 3

   Use the Mer app instead

   Download the Mer app if you do not have it. Create an account and add a payment method. You can start the session through the app even if your RFID card does not work.

4. 4

   Try contactless bank card payment

   Newer Mer stations have a contactless payment terminal. Look for a card reader with the contactless payment symbol. Tap your bank card or phone to start.

5. 5

   Try a Mer-issued RFID card for future visits

   You can order an RFID card directly from Mer through their app or website. Mer's own cards are accepted at all Mer stations without roaming issues.

Charger screen showing error but no error code

The charger screen displays a generic error message like "Error" or "Fault" without any specific code or explanation. This makes it hard to know if the problem is temporary or if the unit is broken.

Symptoms

• Charger screen shows "Error" or a red warning icon with no further detail
• The error appears before you even try to authenticate
• The error appears after plugging in but before power delivery starts
• Screen alternates between the normal start screen and the error message

How to Fix It

1. 1

   Unplug the connector and wait 30 seconds

   Some Mer chargers show transient errors after a previous session ended abnormally. Unplugging and waiting gives the charger time to reset its internal state.

2. 2

   Try the other connector on the same unit

   If the station has a second CCS2 connector, try that one. A hardware fault on one connector does not always affect the other.

3. 3

   Check if other cars are successfully charging at the station

   If nobody at the station is charging, the entire station may be down. If others are charging fine, the issue is limited to your connector.

4. 4

   Report the faulty unit in the Mer app

   Open the Mer app, find the station, and report the issue. Include which connector number has the error. This helps Mer send a technician and warns other drivers.

5. 5

   Move to a different station

   A charger with a persistent generic error is unlikely to start working on its own. Use the Mer app to find the nearest alternative station.

Cable locked and will not release in cold weather

You finished charging but the CCS2 cable will not unlock from your car. In Nordic winters, ice can form around the connector locking mechanism, making it physically difficult to release.

Symptoms

• Pressing the connector release button does not unlock the cable
• The connector feels frozen in place
• Your car shows "Charging complete" but the cable is stuck
• The locking pin on the connector is visibly iced over

How to Fix It

1. 1

   Make sure the charging session has fully ended

   The cable stays locked while a session is active. Stop the session in the Mer app or on the charger screen, then try releasing the connector again. Wait 10 seconds after the session ends.

2. 2

   Try unlocking from your car

   Most EVs have a cable release option in the infotainment system or a button near the charge port. Use your car's unlock function rather than the connector button.

3. 3

   Warm the connector gently

   If ice is the problem, pour lukewarm water (not boiling) over the connector and charge port area. You can also cup your hands around the connector to warm it with body heat. Do not use force or tools to pry it free.

4. 4

   Run the car's cabin heater for a few minutes

   Turning on the car's climate system can gradually warm the charge port area from the inside. This works slowly but can free a mildly frozen connector after 5-10 minutes.

5. 5

   Call Mer support if the cable is truly stuck

   If nothing works after 15 minutes, call the support number on the charger. Mer can remotely release the cable lock on their end. Do not pull with excessive force as this can damage both the connector and your car's charge port.

App requires location services for remote start

The Mer app asks you to enable location services before you can start a charging session, even when you are standing right next to the charger and selected it manually from the map.

Symptoms

• App shows "Enable location services to start charging" popup
• Start button is grayed out until location permission is granted
• The app worked fine before but now demands location after an update
• You can browse the map but cannot start a session without GPS enabled

How to Fix It

1. 1

   Enable location services temporarily

   Go to your phone's settings, find the Mer app, and set location access to "While Using the App." You can change it back after your session.

2. 2

   Make sure GPS has a fix

   In underground parking garages or areas with poor GPS reception, the app may not be able to confirm your location. Step outside or move closer to an open area until the app detects your position.

3. 3

   Use RFID or contactless payment instead

   If you do not want to share your location, use your RFID card or a contactless bank card to start the session. These methods do not require the app at all.

4. 4

   Scan the QR code on the charger

   Some Mer chargers have a QR code that opens the start process in a browser, bypassing the app's location requirement.

Former Grønn Kontakt station not found in Mer app

Mer acquired Grønn Kontakt in Norway, but some older stations may not appear correctly in the Mer app, especially during the transition period.

Symptoms

• Station visible on the street but not on the Mer app map
• Searching by the old Grønn Kontakt name returns no results
• QR code on the charger links to a Grønn Kontakt page that no longer works
• RFID card from Grønn Kontakt account rejected

How to Fix It

1. 1

   Update the Mer app to the latest version

   Older versions of the app may not include recently migrated Grønn Kontakt stations. Update from the App Store or Google Play.

2. 2

   Search by the station's physical address

   Instead of searching by station name, try the street address or zoom into the location on the app map. The station may appear under a new Mer name.

3. 3

   Enter the charger ID manually

   Look for a station or connector ID printed on the charger hardware. Enter this ID in the Mer app's manual start option.

4. 4

   Use contactless payment to bypass the app

   If the station has a payment terminal, tap your bank card to start. This works independently of whether the app has the station listed.