I know i’m a little late to the party, but I had ChatGPT do some Deep Research to find the Status codes as i’m also interested, and this is the result.
Status Code 1 – Startup (Phase 1):** Indicates the inverter is in an initial startup stage. This occurs when the inverter is just beginning to wake up or initialize. No power is being fed into the grid yet during this phase. (At night or very low light, the inverter may sit in early startup/standby stages waiting for sufficient sunlight.)
Status Code 2 – Startup (Phase 2):** The inverter is still in its startup sequence (not producing power yet). It may be performing internal checks or waiting for DC input to reach the required level. In darkness (nighttime), the inverter often alternates between codes 2 and 3 as it periodically tests for enough sunlight to start feeding. This is a normal “not yet active” state.
Status Code 3 – Startup (Phase 3):** A later stage of the startup process, where the inverter is nearly ready to begin power export but is still not feeding the grid. The inverter has completed most checks and is synchronizing with grid conditions (voltage/frequency) before connecting. At night, the inverter might cycle into this state as it tries to start, then falls back due to insufficient solar power. Like codes 1 and 2, this means the inverter is on but not yet producing output.
Status Code 4 – Running (Grid Power Reduction Mode):** This code indicates the inverter is on and capable of feeding in, but its output is being actively limited due to a grid condition. In practice, code 4 is commonly triggered by Grid Voltage Dependent Power Reduction (GVDPR) – also known as Volt-Watt mode. This means the grid voltage is higher than the acceptable threshold (e.g. above ~250 V), so the inverter continues operating with reduced power to protect the grid. In other words, the inverter is running but throttled due to high grid voltage.
Status Code 5 – Running (Thermal Derating):** The inverter is on and feeding power, but its output is being curtailed due to an internal limitation, typically overheating. High internal temperature can cause the inverter to automatically derate (reduce output) to prevent damage. While code 5 is active, a warning may be logged, but the inverter is still online (not off). Once temperatures fall to safe levels, the inverter should return to normal full-power operation. (In summary, code 5 means the inverter is producing power at a reduced level, often due to thermal protection.)
Status Code 6 – Running (Grid Frequency Derating or External Limit):** This code signifies the inverter is operating but not at full output due to external factors. A common cause is over-frequency on the grid – if grid frequency rises above the nominal range, the inverter will reduce power to help stabilize it. Code 6 could also indicate other curtailment, such as an external command to limit output or a special operating mode. In this state, the inverter remains online and feeding, but at curtailed power. Normal operation (code 7) resumes once grid frequency or other conditions return to normal.
Status Code 7 – Running (Normal Operation):** The inverter is in full active operation, feeding energy into the grid at maximum available power. This is the standard daytime status when the PV system is producing. In this state the inverter is in MPPT mode, delivering power as per available sunlight. Code 7 is the typical status during daylight hours when everything is working and no limiting conditions are present. (In short, code 7 = normal power production.)
I hope that helps if anyone is still trying to figure it out.
Geoff
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