Skip to main contentAC Losses models calculate power dissipation in the electrical infrastructure between the inverter output and the point of interconnection.
Models in This Section
Degradation Losses (AC Applied)
Time-dependent degradation applied at the AC level (first in the loss chain):
- Linear AC: Continuous linear degradation applied to inverter AC output
- Stepped AC: Annual step-wise degradation applied to inverter AC output
- LeTID: Light and Elevated Temperature Induced Degradation (optional, calculated from original input power)
AC System Losses
Complete loss chain from degraded inverter output to grid:
- Auxiliary Loads: DAS, cooling, and tracker motor power consumption
- MV Transformer: Array-level step-up transformer (quadratic loss model)
- AC Collection System: Medium-voltage network losses (quadratic or flat percentage)
- HV Transformers: High-voltage step-up transformers (quadratic loss model)
- Transmission Lines: I²R losses from line geometry and power flow
- Availability: Percentage reduction for downtime and curtailment
- Grid Limit: Clipping to LGIA/POI capacity constraint
Loss Sequence
Array Level:
- AC Degradation (Linear AC or Stepped AC, if selected)
- LeTID losses (calculated from original input power, if enabled)
- Auxiliary loads (DAS, cooling, tracker motors)
- MV Transformer
- AC Collection System
Plant Level:
- HV Transformers and Transmission Lines (user-defined order)
- Availability Loss
- Grid Limit (LGIA)
