01 · Inverter current
Single-phase uses I = P / V. Three-phase uses I = P / (√3 × V). Power factor is 1 for kW ratings.
Solar voltage rise · AS/NZS 3008
Follow the inverter path. Segment by segment.
Model the point of supply to inverter path, see every cable contribution and apply export limiting only where it belongs.
Generation and cable path
Use the combined inverter rating if multiple inverters share this path.
02 · Each cable segment
Rise is I × L × 2Z / 1000 for single-phase or I × L × √3Z / 1000 for three-phase, divided by parallel cables.
03 · Export limiting
Only the point-of-supply to main-switchboard segment is reduced. Downstream cables may carry full inverter output consumed on site.