- EV charging
- EV charger
101
Wallbox 101: the charger stopped because of a connection or internal error
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
101 means the charger stopped because of a connection or internal error in the cited charger family. The deciding observation is whether one documented restart with the vehicle disconnected lets the next charge begin. Do not infer a failed part from the code alone.
Safety first
Stop and check this first
- Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Safe checks you can perform
- Capture the exact charger, vehicle and pattern
- Run the one deciding check
- Use recurrence as the stop point
Leave these tasks to a qualified professional
- Do not attempt this professional task: Measured handoff for 101
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Measured handoff for 101
What they doUse the serial number, firmware state and event history to separate supply/connection loss from an internal charger fault before authorising repair or replacement.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Checks and evidence, step by step
Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
- 1
Capture the exact charger, vehicle and pattern
No special tools
Procedure
Photograph 101 and record the Wallbox model, part/serial number, vehicle model, cable used, charge stage and approximate time. Do not clear the event before those facts are saved.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- 2
Run the one deciding check
No special tools
Procedure
Disconnect the vehicle, restart the charger once using Wallbox’s documented control, then reconnect only after the restart has completed. Record whether one documented restart with the vehicle disconnected lets the next charge begin. Change one condition only.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- 3
Use recurrence as the stop point
No special tools
Procedure
If charging starts, the protected state cleared; that does not prove which connection or internal condition caused it. If 101 returns after that single pass, the user branch is exhausted; restoring repeatedly would erase evidence without identifying a part.
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- EV charging
- Brand
- Wallbox
- Product type
- EV charger
Known code variants
- 101 Cambio de protocolo
- 101 Cambio di protocollo
- 101 Changement de protocole
- 101 Protokollwechsel
- 101 Switching Protocols
- cargador Wallbox 101
- caricatore Wallbox 101
- chargeur Wallbox 101
- code Wallbox 101
- codice Wallbox 101
- código Wallbox 101
- erreur Wallbox 101
- error Wallbox 101
- errore Wallbox 101
- événement SMA 101
- evento SMA 101
- HTTP 101
- HTTP status 101
- inversor SMA 101
- inverter SMA 101
- onduleur SMA 101
- SMA Ereignis 101
- SMA event 101
- SMA inverter 101
- SMA Wechselrichter 101
- Sunny Tripower X 101
- Wallbox app code 101
- Wallbox charger 101
- Wallbox error 101
- Wallbox Fehler 101
- Wallbox Fehlercode 101
- Wallbox Ladegerät 101
What it means
Wallbox’s official documentation defines 101 as the charger stopped because of a connection or internal error. That is the protection or controller state, not a universal component diagnosis. If charging starts, the protected state cleared; that does not prove which connection or internal condition caused it. If 101 returns after that single pass, the user branch is exhausted; restoring repeatedly would erase evidence without identifying a part.
Warnings and stop conditions
- Mediumsource verified
Do not open the charger, vehicle connector or electrical panel, and do not probe live contacts. Stop if there is water, damage, heat, burning smell, sparking or a repeated protective-device trip.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Symptoms and causes
Probable causes · in order
- What the manufacturer code establishesConfirmed
Wallbox documents 101 as a state in which the charger stopped because of a connection or internal error. Keep this meaning scoped to the cited charger family and exact light/code pattern.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
- What the result changes — and what it does not provePossible
If charging starts, the protected state cleared; that does not prove which connection or internal condition caused it. If 101 returns after that single pass, the user branch is exhausted; restoring repeatedly would erase evidence without identifying a part.
Evidence: Understanding Wallbox app Error Codes and How to Resolve Them
Virtual technician
Does 101 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Understanding Wallbox app Error Codes and How to Resolve Them
Wallbox · 2025 · official_doc
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