Growatt inverter error codes: full list and meanings
Two kinds of Growatt inverter are common. Off-grid or hybrid SPF inverters (with battery) show two-digit codes, such as 04 or 09. On-grid MIN or MIC inverters (no battery) show three-digit codes, such as 302. Use the table below that matches your screen.
Updated 11-Nov-2026
These codes come from the manuals of the Growatt SPF series (such as SPF 3500/5000 ES, SPF 6000 ES Plus, SPF 3000TL HVM) and the MIN TL-X on-grid series. Other series can use the same number for something else, so check your inverter's model.
For any code, try this first
- Write down the code, and whether the screen says "Warning" or "Fault/Error". A flashing red light is usually a warning; a steady one is a fault.
- Switch off heavy appliances to reduce the load.
- Switch the inverter off, wait 5 minutes and switch it on again.
- Keep the airflow around the inverter clear.
Safety: never reach into an electrical panel, board, gas pipe or the inside of an inverter yourself. You can get a shock or release gas. This is a mistri's job.
Off-grid / hybrid (SPF series, with battery)
01 to 09 and 51 to 62 are fault codes. 10, 12, 13, 14, 19, 20 and 21 are warnings. 01, 02, 03, 04 and 07 can show as a warning or a fault.
| Code | Meaning |
|---|---|
| 01 | Inverter fan is locked or faulty. |
| 02 | Over temperature inside the inverter. Details |
| 03 | Battery voltage too high (over-charged). Details |
| 04 | Battery voltage low. As a warning it beeps; as a fault the inverter stops. Details |
| 05 | Output short circuit. Details |
| 06 | Output voltage too high. |
| 07 | Overload: load above the inverter's rating for too long. Details |
| 08 | Internal DC bus voltage too high. Details |
| 09 | Bus soft start failed: the inverter could not start internally. Details |
| 10 | Warning: output power derating, often because of heat. |
| 12 | Warning: solar charger stopped because the battery is low. |
| 13 | Warning: solar charger stopped because PV voltage is too high. |
| 14 | Warning: solar charger stopped because of overload. |
| 19 | Warning: battery disconnected. Details |
| 20 | Warning: lithium battery not communicating with the inverter (BMS). |
| 21 | Warning: not enough power from the panels. |
| 51 | Over current or surge. |
| 52 | Internal DC bus voltage too low. |
| 53 | Inverter soft start failed (internal fault). |
| 56 | Battery connection open or fuse blown. |
| 57 | Current sensor failed (internal fault). |
| 58 | Output voltage too low. |
| 60 | Negative power fault: usually parallel-inverter wiring or settings. |
| 61 | PV (panel) voltage too high. |
| 62 | Internal communication error. |
On-grid (MIN / MIC TL-X series, no battery)
The screen shows "Error" or "Warning" with the number. 200 and 300 codes are mostly about the house, panels or grid; 400 codes are mostly inside the inverter.
| Code | Meaning |
|---|---|
| 200 | AFCI fault: an arc was detected on the DC side. |
| 201 | Residual (leakage) current too high. |
| 202 | PV DC input voltage above the maximum. |
| 203 | PV isolation low: weak insulation on panels or DC wires (often moisture). Details |
| 300 | Grid voltage out of the permitted range. Details |
| 302 | No AC connection: the inverter cannot see grid power. Details |
| 303 | PE abnormal: voltage between neutral and earth too high (earthing problem). |
| 304 | Grid frequency out of the permitted range. |
| 402 | Output DC current component too high (high DCI). |
| 404 | Error 404: bus voltage sampling fault (internal). Warning 404 means a memory (EEPROM) fault. |
| 405 | Error 405: relay fault. Warning 405 means a firmware version mismatch. Details |
| 407 | Auto test failed: the inverter's self-test did not pass. |
| 408 | Inverter over temperature. |
| 409 | Internal DC bus over voltage. Details |
| 411 | Communication fault between the inverter's internal boards (DSP and M3). |
| 414 | EEPROM (memory chip) fault. |
| 420 | GFCI fault: fault in the earth-leakage protection circuit. |
| 401 | Warning: inverter cannot communicate with the meter. |
Common questions
How do I reset a Growatt inverter error?
Reduce the load, switch the inverter off and switch it on after 5 minutes. Warning codes clear by themselves once the cause is gone. If a fault code stays after a restart, the inverter or wiring has a fault and a solar mistri should look at it.
Can I open the inverter and fix it myself?
An inverter carries DC current from the panels and battery that can kill, even after the mains is off. Never open the inverter cover or the DC wires yourself.
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