AC other loss

What this step does

The row removes a flat share of the exported power, on every timestep with export, for AC losses that no other row models. It acts on the grid energy after the fixed transmission loss.

The math

1. Running total
2. Loss at a timestep

$$E_{after} = E_{before} - E_{row},\qquad E_{row} = \frac{\Delta t}{1000\,P_{DC}}\sum_i L_i \tag{1}$$ $$L_i = f_O\,P_{in,i} \quad (\text{export},\ P_{in,i} > 0) \tag{2}$$

where

Symbol	Meaning	Unit
$E_{before}$	the running total of the loss diagram before this row	kWh/kWp
$E_{after}$	the running total after this row	kWh/kWp
$E_{row}$	the row taken as a loss	kWh/kWp
$\Delta t$	the length of one timestep	hours
$P_{DC}$	the DC nameplate of the system	kWp
$L_i$	the power lost at timestep $i$ over the whole system	W
$f_O$	the other AC loss fraction	—
$P_{in,i}$	the power of the whole system after the fixed transmission loss at timestep $i$	W

Reading the number

A loss, negative. It is zero on utility and rooftop systems unless a fraction is entered; with a fraction entered, the row is about that fraction of the grid energy.

API

loss.ac_other

Symbols follow the symbol registry.