myenergi zappi Voltage Mismatch
Code 32: the zappi’s controller and its protection components measured the output voltage differently. A disagreement between two safety measurements, so the unit stops.
Take care
Get a registered electrician to look at your myenergi zappi ev charger
We do not pass enquiries to a repair firm, so there is no form here. When you book a registered electrician, tell them the make, the model and the exact code or message on the display, and ask whether they carry parts for this make — that is what turns one visit into a repair rather than a quote.
What this means
The zappi measures the voltage it is sending to the car in two places, once in the main controller and once in the separate protection components, and Voltage Mismatch, code 32, is the message when the two do not agree. myenergi’s definition is exactly that: the output voltage detected by zappi and the built-in protection components is not the same.
Two measurements are used because each checks the other; if one board is wrong about what is on the output, the other catches it, and the unit stops rather than trust either. The action published is the standard reset, unplug the EV and press and hold the button. Because the two readings are taken by different circuits, a genuine mismatch means one of them has drifted or failed, and that is inside the enclosure where nothing is owner-serviceable.
A one-off after a brownout or during a firmware update deserves the reset; a repeat deserves the closing line of the table, which is to stop using the zappi and contact your supplier or myenergi technical support. This code has nothing to do with your supply voltage being high or low, which is code 31, Bad Voltage Range. There the zappi agrees with itself and disagrees with the grid. Here the grid may be perfectly normal and the zappi disagrees with itself.
What causes it
| Cause | What is actually happening | How likely |
|---|---|---|
| One of the two measurement circuits has drifted or failed | The meaning of the code. The controller and the protection board should read the same output voltage; when they do not, one is wrong, and the unit cannot tell which. | Common |
| A transient during switching or a supply dip | Fast changes can catch the two circuits at different instants. The single published reset covers it. | Occasional |
| A protection board that is failing generally | Often keeps company with 26 or 27 on the same unit. Different symptom, same hardware, same call. | Occasional |
Can you fix it yourself?
Stop — this needs an engineer
What it costs to fix
Typical repair cost
£0–£400
Time on site
10 minutes
Free under warranty. Outside it, the same protection board or unit exchange as the rest of this family, £150 to £400 with labour.
Typical UK prices including parts and labour, updated September 2026. Your quote may differ.
Own this appliance and had this code? . Nothing is published until a person has read it.
Related myenergi zappi fault codes
- SelfTest FailedGet it checkedCode 27, searched as A27. The built-in protection devices could not be tested, or failed the test, before a charge. myenergi’s action is a reset; they do not say it cannot be repaired.Related: internal protection
- Contactor FaultGet it checkedCode 28. myenergi say a relay inside the unit has welded, and that a second relay is holding the supply to your car isolated. Their action is one reset; if it returns, contact them.Related: internal protection
- Comms FaultGet it checkedCode 26: the zappi cannot talk to its own built-in protection components. One reset is the published action; a repeat is a hardware fault inside the unit.Related: internal protection
- Output FaultGet it checkedCode 24: the zappi has measured voltage on its output when the output should have been off. The unit stays off; reset once, and if it repeats it is a call to myenergi.Related: internal protection
- PEN FaultStop — call an engineerCode 29. The protection against loss of the supply earth-neutral conductor has operated, and myenergi tell you to remove the fault before resetting.Related: same brand
- PE FaultStop — call an engineerCode 25. myenergi say the earth is either disconnected or its impedance is too high — a problem in the installation rather than in the charger.Related: same brand
Own a myenergi zappi ev charger? Save it and its codes come first next time.
Related guides
Technical review
Not reviewed by an engineer
No engineer has read this page. Severity follows what the manufacturer publishes, and we would rather tell you that than let a byline imply a sign-off.
Sources and how we verified this
We establish the facts from the sources below and then write the explanation ourselves. We do not copy manufacturer wording and we do not host their manuals.
- Manufacturer technical and service documentation
This page has not been reviewed by an engineer, and we would rather tell you that than imply otherwise. The severity rating follows what the manufacturer publishes: where they say isolate the appliance and call someone, so do we.