At the inverter output

Method

The limit holds at the inverter output. The ceiling of the inverters together is the limit itself, shared equally among them, and each inverter's own AC limit still applies. The losses after the inverters then take their share, so the grid receives less than the limit. On a timestep where the array could deliver more, the inverter brings its output down to the ceiling by the rules of the Inverter operating limits step. The energy not produced counts in the Inverter Loss over nominal inv. power row, or in the Unused energy (grid limitation) row when the limit is accounted as a separate loss (Losses tab).

The math

$$P_{max} = \min\!\left(P_{ac}(T_{amb}),\ \frac{P_{grid,lim}}{N_{inv}}\right) \tag{1}$$

where

Symbol	Meaning	Unit
$P_{max}$	the AC ceiling of one inverter	W
$P_{ac}(T_{amb})$	the inverter's own AC limit at the ambient temperature $T_{amb}$	W
$P_{grid,lim}$	the grid power limitation as active power: a limit in kVA is multiplied by the power factor	W
$N_{inv}$	the number of inverters	—

References

1. PVsyst 8 help, Grid power limitation

API

ac_losses.use_grid_limit = true, ac_losses.grid_limit_at = inverter_output

Symbols follow the symbol registry.