PPI/Power performance index chart

Last modified: 2026-06-15

Chart

View the chart at System level in the Evaluation tab in the Section: System KPIs.

Basic info

Description	The PPI/Power performance index is the ratio between a system’s actual AC power and the expected AC power. Ideally, the value should be as close to 100% as possible. Values are calculated starting at an irradiance of 50 W/m². Expected power is always calculated based on the target performance ratio and the irradiation, even though this method is not necessarily selected for its simulation in the system settings.
Prerequisites	Target performance ratio is configured. See Target performance ratio.
Further details	All other parameters are fixed.

Description

The PPI/Power performance index is the ratio between a system’s actual AC power and the expected AC power. Ideally, the value should be as close to 100% as possible. Values are calculated starting at an irradiance of 50 W/m².

Expected power is always calculated based on the target performance ratio and the irradiation, even though this method is not necessarily selected for its simulation in the system settings.

Prerequisites

Target performance ratio is configured. See Target performance ratio.

Further details

All other parameters are fixed.

Note

Find further information on the general functions within charts under Evaluations & charts.