In view of different sub-synchronous instability events in real power systems dominated by inverter-based resources (IBRs), impedance-based modeling has gained prominence for small-signal stability assessment. In this context, the present work aims to assess the impact of PV-side components on a two-stage PV impedance model. A sensitivity analysis was conducted regarding the DC-DC converter controller, the PV-side filter, and the solar module array, comprising the primary parameters. Additionally, this analysis was repeated under different conditioning variables, including irradiance level, DC-link capacitor, and DC voltage controller, which can affect the sensitivity to primary parameters. These parameters were varied collectively to investigate interdependencies. The first analysis indicated negligible sensitivity of the impedance profiles to the primary parameters. However, the second analysis drew a different conclusion when comparing the full model and a simplified one that disregards the PV-side components. Depending on the values of the conditioning variables, the simplified model may lead to inaccuracies.