String Sizing
The process of determining how many solar panels to connect in series per inverter string based on voltage, temperature, and inverter operating window specifications.
Why It Matters
Incorrect string sizing can cause inverter shutdown (voltage too high) or reduced production (voltage too low). It's affected by local temperature extremes and NEC requirements.
Related Topics
Related Terms
String Inverter
A central inverter that connects to multiple solar panels in series (strings). Less expensive than microinverters but less flexible.
DC/AC Ratio
The ratio of a solar array's DC panel capacity to the inverter's AC output rating. Typical residential values range from 1.1 to 1.35.
Inverter
A device that converts direct current (DC) electricity from solar panels into alternating current (AC) electricity used by your home.