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Fault code index · Growatt inverter and battery

Growatt Fault Code Index

Every Growatt error code from the inverter display and ShineServer portal — what it means, the most likely cause, and what to do. Find your code in the index below or use the category sections to browse by system area.
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What a fantastic service. Had my fault diagnosed within minutes and actually managed to resolve the issue remotely within a few minutes more. This guy is like a “Solar Batman” helping consumers fix their problems using his extensive industry knowledge and expertise. Outstanding service. Thank you so much.

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Paul Smith · May 2026

I can add to the list of customers who had already 'given up' on GivEnergy due to their appalling customer service, and that was before they went into administration. So you can imagine my desperation when, having changed my ISP and my Inverter, predictably, proving to be the only device that didn't connect automatically to my new network, I found zero prospect of any customer support with GivEnergy having called in the administrators just five days earlier! The salvation came from Solar Tech Support. My IT advisor stumbled across their web site and some very helpful tips for beleaguered GivEnergy customers, as well as an offer to provide direct assistance. Nothing ventured, I decided to drop them an E-Mail, with very low expectations based on my experience of GivEnergy customer support. Within an hour Ron had responded with some pin point advice, and after a few exchanges of E-Mails he had nailed the problem, enabling the combined efforts of my IT advisor and solar installer to resolve it and reconnect my Inverter. Thank you Solar Tech Support, and Ron in particular, for coming to the aid of a deserted and despondent GivEnergy customer. Expert, razor sharp advice and first class customer service, even though I wasn't officially a customer.

customer · Apr 2026

Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.

Steve M · Jun 2026 Google

Ron was brilliant. He really tried to help. He spent hours trying to fix our GivEnergy AIO and ultimately it became apparent that it needed parts to fix the BMS management system. As there appears to be no replacement parts available on the market, he gave excellent advice on what options are now available to move forward. He is incredibly helpful and knowledgeable.

Mark Mayson · Jun 2026 Google

I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues

michael fairhurst · May 2026
How to find your fault code. Growatt fault codes appear on the inverter LCD display as "Error" or "Fault" code number. They also appear in the ShineServer/ShinePhone portal under Device → History, and in the ShineMaster log. The code format is typically Error XX where XX is a two-digit number. Note the exact error number and whether it is transient or persistent before booking.
Inverter & AC faults

Fault codes generated by the inverter in response to AC supply problems, DC overvoltage from panels, or temperature issues. These typically cause the inverter to stop generating.

Error 01Grid over-voltage
Grid AC voltage exceeded upper limit. Usually transient. Reconnects automatically when grid normalises. Common on export-dense circuits.
Error 02Grid under-voltage
Grid AC voltage below lower limit. Check AC isolator and consumer unit. If connections are sound, contact DNO.
Error 03Grid over-frequency
Grid frequency above upper limit. Transient, reconnects automatically.
Error 05PV over-voltage
PV string voltage exceeds inverter maximum. Do not touch DC cabling. Requires engineer to check string configuration.
Error 07Over-temperature
Inverter temperature too high. Check inverter ventilation — minimum 20cm clearance on all sides. Clear any dust from vents. If in direct sun, shade the inverter if possible. If Error 71 (fan fault) is also present, address the fan first.
AFCI arc fault Arc fault — newer models
Arc fault detected on DC string — applies to Growatt models with AFCI (Arc Fault Circuit Interrupter) protection. This indicates a dangerous electrical discharge in the DC wiring. Do not touch any DC cabling. Engineer inspection required before restarting. The inverter display may show "Arc-fault" or a specific Error code depending on firmware version.
Insulation / isolation faults

Fault codes related to insulation resistance between the PV string and earth, or between AC wiring and earth. These are safety-critical faults.

Error 04 Insulation fault
Insulation resistance between PV string and earth is below minimum. This is the most common Growatt fault code. Do not touch DC cabling until an engineer has confirmed the fault location. Common causes: water ingress at MC4 connectors, damaged string cable, faulty panel junction box. Share your exact code and system details when booking — we identify the fault source from monitoring data.
Error 04 (AC side) AC isolation fault
AC wiring insulation fault. Do not touch any AC wiring. Isolate at consumer unit. Requires a qualified engineer.
Grid faults

Fault codes related to grid supply, grid voltage, and grid current issues.

Error 08AC over-current
Output current exceeds rated maximum. May indicate a downstream wiring fault. Isolate inverter and check AC connections.
Error 10No grid
Grid supply absent. Check AC isolator and consumer unit breakers. If the grid is present, the issue is with the AC connections or the inverter's grid detection circuit.
Error 21Residual current fault
Residual current detected at inverter output. Do not touch AC wiring. Isolate at consumer unit. Requires a qualified engineer to check AC wiring integrity.
Grid under-frequency / Low frequencyUnder-frequency disconnect
Grid frequency dropped below the lower limit (typically below 47Hz in the UK). The inverter disconnects automatically and reconnects when frequency recovers. Shown as "Low frequency" or "Under frequency" on the display on most Growatt string models rather than a specific Error number. Transient events are normal; frequent occurrences should be reported to the DNO.
Battery / BMS faults

Fault codes from the battery management system — communication failures, voltage protection events, and thermal management.

Error 61Battery comms fault
Inverter has lost communication with the battery BMS over the RS485 or CAN bus. Check communication cable between inverter and battery. Power cycle the system. If persistent, check battery firmware version matches inverter expectations.
Error 62Battery over-voltage
Battery voltage exceeded safe maximum. Do not attempt to charge. Requires engineer to check battery management system.
Error 63Battery under-voltage
Battery voltage below safe minimum. Battery protection has activated. Allow a slow charge cycle. Contact Growatt support if battery does not recover.
Error 71Fan fault
Cooling fan has failed or is obstructed. Check vent area for blockages. May require fan replacement.
Communication faults

Faults related to data communication between inverter and monitoring portal, and internal processor communication.

ARM-DSP comms failInternal processor fault
Internal communication fault between ARM processor and DSP processor. Often cleared by a full power cycle (including DC isolator). If persistent, the ARM or DSP board may need replacement.
No data — portal offlineMonitoring connectivity
ShineServer has not received data from the ShineWifi or ShineLAN logger. Check logger LED status. A flashing green LED indicates WiFi connection issues. Reconfigure WiFi via ShinePhone if needed.
Code not listed here?

Growatt releases firmware updates that may introduce new fault codes. If your code isn't listed, share the exact code from your inverter display or ShineServer and we'll identify it.

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FAQ

Growatt fault code questions

Growatt fault codes appear on the inverter's LCD screen as Error XX (e.g. Error 04). They are also logged in the ShineServer portal under Device > History, and in ShinePhone under the error history tab. Note the exact error number — including whether it is a warning or error — before contacting support or searching this index.
Error 04 is an insulation fault — the resistance between the PV string and earth has dropped below a safe threshold. This can indicate water ingress at MC4 connectors, damaged string cabling, or a faulty panel junction box. You should not touch any DC cabling. The system should be isolated at the consumer unit until an engineer has identified the fault source. Do not restart the system repeatedly — this does not fix the fault and may worsen the underlying issue.
The ARM-DSP fault indicates the inverter's two internal processors have lost communication. This is often caused by a firmware corruption or a transient startup fault — a full power cycle (turning off AC isolator, DC string isolator, and waiting 60 seconds before restarting) clears it in many cases. If it returns persistently, the inverter control board may need replacement or a firmware reflash by a qualified engineer.
Yes, the ShinePhone app and Growatt server log fault history that STS engineers can review. Free remote diagnosis — no fix, no fee, and many firmware-related faults can be resolved without a site visit.
The remote diagnosis is free. We read your ShineServer fault history and live data to tell you what the code means and what's behind it. If it's something we can put right remotely — a setting or a comms reset — it's £75, and you only pay if we fix it. A physical fault like an insulation fault or a failed board is an on-site repair, quoted first, from £245.
Usually the same day. Send us the exact Error code — Error 04, 117, or any other — and we read your ShineServer history in a 30-minute remote session, then send you a written summary of the cause and the recommended fix straight after.
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Share the exact fault code from your inverter display or ShineServer, what the system is doing, and when it started. We'll identify the cause and tell you whether it needs a remote settings fix or a site visit.

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