SG2500U, SG3400HV, SG5000UD — 1.5–5 MW
SG33CX, SG110CX, SG250HX — 33–250 kW
SH5K, SH10RS, PowerStack — BESS integration
| Step | Description |
|---|---|
| 1. Fault Logging | Extract error codes via iSolarCloud or RS485 |
| 2. On-site Diagnosis | Thermography, insulation test, waveform analysis |
| 3. Module Isolation | Remove IGBT, DC-DC, MPPT, or control board |
| 4. Component Repair | Replace IGBT (FF450R12ME4), gate driver, fuse |
| 5. Firmware Update | Latest version via Sungrow service tool |
| 6. Load Testing | Full power simulation on test bench |
| 7. Commissioning | Reconnect to SCADA, verify PR & efficiency |
Turnaround: 2–5 days | Rush: 24 hrs
Warranty: 12–24 months on repaired unit
| Fault Code | Description | Typical Fix |
|---|---|---|
| 002 / 003 | Grid Over/Under Voltage | Check tap settings, grid stability |
| 014 | IGBT Over Temperature | Clean heatsink, replace fan |
| 036 | DC Bus Overvoltage | Replace DC link capacitor |
| 101 | MPPT Failure | Replace DC-DC board |
| 200 | Communication Loss | RS485 wiring, COM board |
Ready stock of critical spares:
Direct from Sungrow, 4–8 week lead
Tested & calibrated, 1–2 day delivery
Send faulty → get working spare instantly
| Type | Model | Power |
|---|---|---|
| Central | SG2500HV / SG3400HV | 2.5–3.4 MW |
| String | SG110CX / SG250HX | 110–250 kW |
| String | SG33CX / SG50CX | 33–50 kW |
| Hybrid | SH10RS / PowerStack | 10 kW + 100 kWh |
| Benefit | Details |
|---|---|
| Cost | 40–60% cheaper than new inverter |
| Downtime | <24 hrs with exchange |
| Expertise | Certified by Sungrow, 500+ repairs |
| Remote Support | iSolarCloud diagnostics & firmware |
