⚠️ Growatt Inverter Error Codes — Complete Troubleshooting Guide Pakistan 2026
Every Growatt error code explained with cause, severity and step-by-step fix. Covers MIN on-grid, SPH/SPF hybrid, and MAC three-phase models. Save this page — it's the fastest way to diagnose your Growatt problem.
📋 In this guide
1. How to Read Growatt Error Codes
Growatt inverters display error codes on the LCD screen and in the ShinePhone app. Understanding the code prefix tells you the severity:
- E codes (Error): Critical faults — inverter has stopped or severely limited output. Requires immediate attention. Often shown with a red LED.
- F codes (Fault): Significant faults affecting operation. Yellow/amber LED. Some may self-clear.
- W codes (Warning): Conditions outside normal parameters — inverter still operating but with reduced performance or protection mode active.
- I codes (Info): Informational — no action needed typically.
2. E-Series Fault Codes — Critical
| Code | Name | Severity | Common Cause in Pakistan | Fix |
|---|---|---|---|---|
| E00 | Internal Communication Fault | Critical | Firmware issue, loose internal connector, power surge during load-shedding | Power cycle inverter (DC off → AC off → wait 2 min → AC on → DC on). If persists, contact dealer — firmware reflash may be needed. |
| E01 | Grid Overvoltage | Critical | DISCO voltage spike above 253V — common in Pakistan when grid restores after load-shedding | Usually self-clears within 30–60 seconds when grid stabilizes. If frequent: install a voltage stabilizer on the AC output, or adjust grid voltage protection threshold via ShinePhone (requires installer password). |
| E02 | Grid Undervoltage | Critical | Grid voltage drops below 184V — common in Pakistan low-voltage feeders | Self-clears when grid voltage normalizes. Persistent low voltage: report to DISCO. Consider hybrid inverter with battery to avoid grid dependency. |
| E03 | Grid Overfrequency | Critical | Grid frequency above 52Hz — rare but occurs on isolated DISCO feeders | Self-clears. If frequent, log frequency readings and report to DISCO. May adjust frequency tolerance in ShinePhone with installer access. |
| E04 | Grid Underfrequency | Critical | Grid frequency below 47.5Hz — Pakistan grid instability | Self-clears. Persistent underfrequency indicates grid quality problem. Document and report to DISCO. |
| E05 | Grid Impedance Too High | Critical | Shared feeder with weak transformer, long distance from transformer | Check AC wiring connections from inverter to distribution board. Ensure correct cable gauge. If wiring is correct, the DISCO feeder quality may be too low — report to DISCO or consider hybrid setup. |
| E06 | DC Bus Overvoltage | Critical | Too many panels in series (Voc exceeds inverter limit), shading causing voltage imbalance | Count panels in each string — ensure total Voc × 1.15 safety factor does not exceed inverter's DC input voltage limit. Reconfigure string if needed. Contact installer. |
| E09 | PV Overcurrent | Critical | DC short circuit, wrong panel string configuration | Check DC fuses. Inspect DC cabling for damage or short circuit. Verify panel wiring matches installer's design. Call AEDB electrician — do not attempt DIY diagnosis on DC side. |
| E11 | Inverter Overtemperature | Critical | Inverter mounted in direct sun, blocked air vents, Pakistan summer ambient above 45°C, dust-blocked fan | Mount inverter in shaded, ventilated location. Clean fan and vents (with inverter OFF and isolated). Ensure 20cm clearance on all sides. Most common Pakistan issue in June–August. |
| E19 | Ground Fault / Insulation Fault | Critical | Damaged DC cable, moisture ingress into MC4 connectors after rain, panel frame not earthed | Do NOT operate inverter with E19. Switch off DC isolator immediately. Inspect all DC cabling and MC4 connectors for damage, corrosion, or water ingress. Check panel frame earthing. Call qualified electrician. |
3. F-Series Fault Codes
| Code | Name | Severity | Pakistan Cause | Fix |
|---|---|---|---|---|
| F01 | AC Relay Fault | Critical | Internal relay failure, power surge damage | Power cycle. If persists, relay replacement needed — contact Growatt dealer for warranty claim. |
| F02 | DSP Fault | Critical | Firmware corruption, power interruption during firmware update | Power cycle. May require firmware reflash by authorized dealer. Do not attempt DIY firmware update. |
| F03 | Inconsistent Grid Parameters | Warning | Poor grid quality, frequent voltage/frequency fluctuations — common in Pakistan | Usually self-clears. Widen grid voltage and frequency tolerance via ShinePhone (installer access needed). If very frequent, consider UPS-grade voltage stabilizer on AC input. |
| F07 | DC Overvoltage Protection | Critical | String voltage exceeds limit — often happens when panels are cold in winter morning (lower temp = higher Voc) | Recalculate string Voc at minimum Pakistan winter temperature (-5°C in northern Pakistan). Reduce panels per string if Voc × 1.15 exceeds inverter limit. Contact installer. |
| F14 | Fan Fault | Warning | Cooling fan blocked by dust — very common Pakistan issue after summer dust storms | Turn off inverter completely. Clean fan with compressed air (do not use water). Remove dust from vents. Fan replacement available from Growatt dealers if completely failed. |
| F23 | GFCI Fault (Ground Fault) | Critical | Leakage current from damaged panel or cable, wet conditions | Same as E19 — switch off immediately, inspect all DC wiring and MC4 connectors. Do not operate until fault is located and repaired. |
4. W-Series Warning Codes
| Code | Name | Pakistan Cause | Action Required |
|---|---|---|---|
| W01 | Grid Voltage High Warning | DISCO grid voltage slightly elevated (230–253V) | Inverter still operating at reduced power. Monitor — if persistent daily, report to DISCO. |
| W02 | Grid Voltage Low Warning | Weak DISCO feeder, shared transformer overloaded | Inverter reducing power output. Report persistent low voltage to DISCO. Consider generator or battery backup. |
| W05 | PV Voltage High Warning | Peak morning generation exceeds MPPT tracking range temporarily | Usually self-resolves as temperature rises. Monitor — if persistent, string reconfiguration may be needed. |
| W08 | Temperature Warning | Inverter above 60°C — Pakistan summer, direct sun exposure | Inverter throttling output. Add shade, improve ventilation, clean fan. Critical to address before summer peak. |
5. Battery & Hybrid-Specific Error Codes (SPH/SPF Models)
| Code | Name | Cause | Fix |
|---|---|---|---|
| Bat E01 | Battery Overvoltage | Battery overcharged — BMS communication failure, wrong battery type setting | Check battery type setting in Growatt parameters matches your actual battery (LiFePO4 vs lead-acid). Verify BMS CAN bus cable connection. Power cycle both inverter and battery (battery off first, then inverter). |
| Bat E02 | Battery Undervoltage | Battery fully discharged below protection threshold, BMS disconnected battery | Allow solar to charge battery during day. If battery completely discharged (deep over-discharge): consult battery manufacturer — LiFePO4 BMS may have entered protection mode requiring specific recovery procedure. |
| Bat E03 | Battery Overcurrent | Inverter charging/discharging faster than battery BMS allows, BMS communication failure | Check battery model compatibility with your Growatt SPH. Verify CAN bus cable is properly connected. Check if battery firmware is compatible with inverter firmware version — may need dealer update. |
| Bat E05 | Battery Communication Failure | CAN bus cable loose or damaged, wrong cable type, battery not powered on | Most common Pakistan hybrid issue. Check: (1) Battery is powered on before inverter. (2) CAN bus cable properly seated in both inverter and battery ports. (3) Using correct Growatt CAN bus cable (not generic RS485). (4) Battery DIP switch settings match Growatt requirements — check battery manual. |
| Bat E07 | Battery Overtemperature | Battery in direct sun or enclosed hot space — Pakistan summer | Battery must be installed in a shaded, ventilated indoor location. Never in direct sun or hot enclosed spaces. LiFePO4 operates 0–45°C ambient. Above 45°C, BMS will disconnect for protection. |
| Gen Fault | Generator Input Fault | Generator voltage/frequency unstable, generator too small, AVR not working | Growatt SPH requires generator with stable AVR output (220V ±5%, 50Hz ±2Hz). Petrol generators without AVR often fail this. Use minimum 3kVA diesel generator with AVR. Warm up generator for 2–3 minutes before connecting to inverter. |
6. Most Common Growatt Problems in Pakistan
🔴 Problem: Inverter shuts down every time load-shedding ends
This is E01 (Grid Overvoltage) triggered by voltage spikes when DISCO power restores. Pakistan's grid often surges above 253V at restoration. Fix: Wait 30–60 seconds after grid returns — inverter reconnects automatically. For persistent high voltage: report to DISCO, or have installer widen the voltage protection band via ShinePhone.
🔴 Problem: Inverter overheating in June–August (E11)
Pakistan's most common summer issue. Inverter mounted on south-facing wall in direct afternoon sun reaches 70–80°C — well above rated limit. Fix: Relocate inverter to shaded north-facing wall or indoors. Add shade canopy if relocation not possible. Clean fan and vents. This single fix often eliminates 80% of Pakistan summer inverter problems.
🔴 Problem: Battery not charging / Bat E05
CAN bus communication failure is the most common hybrid problem in Pakistan. Almost always a wiring or settings issue, not a hardware failure. Follow this sequence: (1) Power off inverter and battery completely. (2) Unplug and reseat CAN bus cable at both ends. (3) Confirm battery is using Growatt-specified CAN protocol (not RS485). (4) Power on battery first, wait 30 seconds, then power on inverter. (5) Check ShinePhone — battery should show SoC within 2 minutes of connection.
🟡 Problem: Low generation on sunny days
Not an error code, but the most searched Pakistan question. Check: (1) Panel dirt — Pakistan's dusty winds coat panels. Clean monthly (early morning, not during heat). (2) Shading from new construction, trees, water tanks added after installation. (3) Check ShinePhone generation vs theoretical — if more than 20% below expected, there may be a string fault or MPPT issue. (4) Verify tilt angle — panels should face south at 25–32° tilt for Pakistan latitude.
7. First-Response Checklist — Any Growatt Error
- Note the exact error code displayed on screen or ShinePhone — write it down before doing anything else
- Check if error appeared during load-shedding restoration, extreme heat, heavy rain, or dust storm — these are the most common Pakistan triggers
- Power cycle the inverter: DC isolator off → AC circuit breaker off → wait 3 minutes → AC on → DC on. Most W-codes and some F-codes self-clear after power cycle
- Check ShinePhone app history — see if error is recurring daily (systematic) or random (often grid-quality related)
- For E19 or F23 (ground fault) — stop here, do NOT power on again. Call AEDB electrician immediately
- For hardware codes (internal faults) — do NOT open inverter. Contact authorized Growatt dealer with your error code, inverter serial number, and ShinePhone screenshot
- If inverter is within warranty — call dealer for warranty claim. Provide: error code, serial number, installation date, photos of installation
Frequently Asked Questions
Pehle: screen pe error code dekho. Phir: DC isolator band karo, AC breaker band karo, 3 minute ruko, pھir AC on karo, phir DC on. Agar code E11 hai (overheat): inverter ko dhoop se bahar rakhna zaroori hai. Agar E19 ya F23 hai: bilkul mat chalao — AEDB electrician bulao. Agar W01/W02 hai: aksar grid voltage ka masla hai, aksar khud theek ho jata hai.
This is almost always E01 (Grid Overvoltage) — Pakistan's grid often surges above 253V when power restores after load-shedding. Your Growatt detects the overvoltage, disconnects for safety, and reconnects automatically once the grid stabilizes (usually 30–90 seconds). This is normal protective behavior. If it's frequent and taking more than 2 minutes to reconnect, ask your installer to widen the voltage protection band via ShinePhone (requires installer login).
- Power off inverter and battery completely
- Unplug CAN bus cable, inspect for damage, reseat firmly at both ends
- Confirm you're using CAN bus protocol — NOT RS485 (different cable/port)
- Power on battery first, wait 30 seconds, then power on inverter
- Check battery DIP switch settings match Growatt's requirements for your battery brand
- If still not working: check if battery model is on Growatt's official compatibility list. Some older Pylontech firmware versions require battery firmware update for compatibility.
- Relocate inverter: Mount on north-facing (shaded) wall, or inside building near external wall
- Add shade canopy: If relocation not possible, install metal shade 30cm above and 20cm around inverter
- Ensure ventilation: 20cm clearance on all sides — no shelves or walls blocking airflow
- Clean fan and vents: Use compressed air to remove dust. Blocked fans are the #1 Pakistan cause of E11.
- Check ambient temperature: Inverter room must not exceed 45°C ambient. Small enclosed rooms can reach 55–65°C in summer.
Warranty claim ke liye: (1) Apne ShinePhone app mein error code aur history screenshot lo. (2) Inverter ka serial number back panel pe likha hai — note karo. (3) Installation date aur installer ka naam/AEDB number. (4) Apne authorized Growatt dealer se contact karo (jis se inverter kharieda tha) ya Growatt Pakistan distributor se. (5) Unhe serial number, error code, installation date, aur photos bhejo. Standard warranty 5 saal hai manufacturing defects ke liye. Installation errors warranty mein cover nahi hote.
Growatt MIN (on-grid) shows E and F codes related to grid voltage, frequency, and DC input. Growatt SPH/SPF (hybrid) shows all the same codes PLUS additional "Bat" codes for battery faults and "Gen" codes for generator input faults. If you see "Bat E05" — this only appears on SPH/SPF hybrid models and indicates battery communication failure. MIN series does not have battery codes as it cannot connect a battery.
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