Inverter Efficiency Curve
A graph showing inverter conversion efficiency at different power loading levels. Most inverters peak at 97-99% efficiency around 30-50% of rated capacity, dropping at very low and very high loads.
Why It Matters
Inverter efficiency varies throughout the day. A properly sized inverter operates near peak efficiency for the most hours, maximizing total energy harvest.
Related Terms
Inverter
A device that converts direct current (DC) electricity from solar panels into alternating current (AC) electricity used by your home.
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.
CEC Efficiency
The California Energy Commission weighted efficiency rating for solar inverters, averaging efficiency across six power levels weighted for typical operating conditions. More realistic than peak efficiency claims.