AC circuit: loss fraction at STC

What it is

The resistive loss of the AC cables from the inverter to the transformer when the inverter runs at its reference power, as a fraction.

Typical values and how to get it

From the cable length, cross-section and voltage. Values of 0.5 % to 1 % are common. If not given: 0: no AC wiring loss.

How it is applied

$$P_{\text{loss}}(t) = \frac{f_{AC}\,P_{ref}}{\text{PF}^2}\left(\frac{P(t)}{P_{ref}}\right)^2$$

where

Symbol	Meaning	Unit
$P_{\text{loss}}(t)$	the loss of the timestep	W
$f_{AC}$	this input as a fraction	—
$P_{ref}$	the AC reference power of one inverter (Model tab: AC power reference)	W
$\text{PF}$	the power factor	—
$P(t)$	the inverter output of the timestep	W

API

ac_losses.ac_wiring_loss_at_stc — sent as a fraction 0–1

Symbols follow the symbol registry.