Solar Inverter Replacement Cost: String vs Micro
Published October 23, 2026
String inverters fail as one unit and often cost $1,140-$2,850 to replace. Microinverters fail per panel and often cost $333-$570 each. Which you have changes the repair path and roof time.
String vs micro at a glance
| String inverter | Microinverters | |
|---|---|---|
| Failure impact | Whole system or string | Usually one panel |
| Typical replace cost | $1,140-$2,850 | $333-$570 per unit |
| Access | Wall/garage unit | Under panels on roof |
Warranty tip
Check manufacturer coverage before paying retail. Discontinued models usually have compatible modern replacements - ask for options in writing.