I’m weighing board-level repair against replacement for an older residential inverter: a 2014 SolarEdge SE7600A.

The fault is intermittent rather than permanent. Monitoring shows normal production after a manual reboot, but output drops again after roughly one to three days. The inverter’s display then reports a fault and stops producing until it is reset. I’ve logged the shutdown times and confirmed that production returns after each reset, but I don’t yet have a definitive diagnosis identifying the control board, power board, or another component.

The inverter is outside its standard warranty, and repair would mean paying for diagnosis, board repair, and labor without knowing how long the fix would last. Replacement would cost more upfront and may involve installation, configuration, and some downtime, but it could provide a new warranty and reduce the risk of another age-related failure.

For anyone who has faced a similar decision, how much diagnostic certainty would you require before approving board-level repair? Did you compare the repair cost with the inverter’s expected remaining life and the total installed replacement cost? I’m also interested in how people handled monitoring records, warranty extensions, and safety checks before repeatedly rebooting an inverter.