How to use the Inverter Loading Curve
The Formula
Derated power = nominal × (1 − (T − 25°C) × 0.01). Hot installs lose continuous headroom before overload timing even matters.
Practical Example
Profiles model typical allowed run times at 110%, 120%, and above—log-interpolated between datasheet points. Always confirm against your exact model manual.
About Inverter Loading Curve
Thermal derating
Derated power = nominal × (1 − (T − 25°C) × 0.01). Hot installs lose continuous headroom before overload timing even matters.
Overload curves
Profiles model typical allowed run times at 110%, 120%, and above—log-interpolated between datasheet points. Always confirm against your exact model manual.
Frequently asked questions
Q: 110% for how long? A: Depends on profile—often ~30–60 min on off-grid units, much less on grid-tie. Q: vs. surge calculator? A: Peak Load & Surge sizes motor starts; this validates sustained overload. Q: Continuous safe? A: At or below 100% of derated nominal.