Link each inverter serial to its IGBT lot, firmware image and burn-in result.

An inverter is a small power plant in a box, sealed against dust and heavy rain and expected to run unattended on a roof for years. Electrolytic capacitors, IGBT modules, Hall-effect current sensors and the DSP board arrive from different suppliers in different lots. Parts change when a supplier revises a datasheet. A unit trips in the field after a year. Which parts did it contain?

Production software for inverter makers keeps that answer on the serial number. Board lots, firmware image, burn-in log and final test sheet attach as the unit moves down the line, so nobody rebuilds the history from emails when a distributor phones. Tell us which stations flash firmware, burn in and test, and the serial records follow that sequence.

Stores issue a kit against the work order: IGBT power stage, DSP control board, aluminium heatsink, output inductors, DC-link capacitors, MC4 connectors and enclosure. An SMT line or an outside board assembler supplies the boards. Each lot is counted at the bench. Operators mount the power stage with thermal paste, crimp the wiring, torque the terminal block and close the lid.

Firmware is flashed through the JTAG header and the unit goes into a burn-in chamber under load. A final test then checks output voltage, MPPT efficiency points, ground-fault and anti-islanding trips, and RS485 or Wi-Fi communication. Pass or fail. Passing units get a rating plate and serial. Failures move to a repair bench carrying a fault code. Each shipped unit joins a warranty record holding the dispatch date and the distributor’s name, which settles any later claim.