Minimum DC Power
If specified for the inverter, the effect of a minimum DC power threshold can be evaluated.
At each time step, all points in \(IV_{\text{array,IDCmax}}(t)\) where I*V is less than the inverter minimum DC power are removed, to give \(IV_{\text{array,PDCmin}}(t)\).
$$\Delta_{inv,PDCmin}\left( t \right) = \left( \frac{MPP(IV_{array,PDCmin}\left( t \right))}{MPP(IV_{array,VDCmax}\left( t \right))} - 1 \right) \bullet 100%$$
Average over time and arrays to evaluate effect for entire PV plant as previously. De-season as needed for annually-representative results.