In this document
The Inverter statistics page provides a detailed breakdown of how the inverters perform across different operational states throughout the year. By analyzing these distributions, you can identify periods of energy loss, validate your system design, and ensure your hardware is operating within its most efficient technical parameters.
Prerequisites
An active Solargis Prospect account.
Admin rights, for editing purposes.
A project created within Evaluate with a PV-configured system.
Prerequisites
To access and view the Inverter statistics chart and table, the following conditions must be met:
Active PV project: The project must contain a defined Photovoltaic (PV) system.
Completed simulation: The system must be successfully simulated to generate time-series operational data.
Important: This section is available after the 2.7.0 application release only.
Understanding the distribution chart
The Monthly overview of inverter state distribution chart visualizes the percentage of time slots in each month that the inverters spend in various states. This visual information can be used in several analyses:
Performance Monitoring: High percentages of "Optimum operation" (green) indicate a well-matched DC/AC ratio and efficient string sizing.
Loss Identification: "Self-clipping" and "Grid power limitation" help quantify how often your system is capped by hardware or regulatory constraints.
Seasonal Trends: Highlights how shorter days (Night slots) or peak summer temperatures/irradiance (Grid power limitation or Self clipping) affect the inverters’ ability to stay within the MPPT range.
Data table breakdown
The table provides the precise numerical values corresponding to the chart, allowing for granular audit-level analysis of the following states:
Optimum Operation: Time spent within the manufacturer-specified optimal voltage and current range.
Self Clipping: Occurs when the inverter restricts power output because the DC input exceeds the inverter’s Pmax or Imax limits.
Stand By: Time when the inverter is inactive during daylight hours because minimum startup voltage or power thresholds were not met, or a valid MPPT (Maximum Power Point Tracking) point could not be found.
Grid Power Limitation: Indicates time slots where the inverter's output was throttled to comply with a site-specific grid injection limit.
Night Slots: Time slots where no solar irradiance is available, representing the system's natural downtime.
Info: A valid MPPT point may not be found when the inverter cannot find a valid working point within its I-V-P operational envelope. This typically happens during cold, sunny "clear sky" events. In these cases, low temperatures and high irradiance push the array's electrical output beyond safe limits. The resulting voltage or current exceeds the inverter's input range, maximum current Imax, or power limits Pmax. Because the array's curve shifts completely outside these thresholds, the MPPT cannot "lock" onto a functional point. The inverter remains in standby to protect its internal components from damage.
Next Steps & Optimization
Based on the readings displayed in your report, you can take the following actions to improve system yield:
Reduce Self-Clipping: If clipping percentages are high (e.g., > 5-10% in summer), consider reducing the DC/AC ratio by either adding more inverter capacity or removing a small number of modules to minimize clipping losses.
Minimize Standby Time: If standby time is significant during daylight, check your string configuration. You may need to increase the number of modules per string to ensure the string voltage consistently exceeds the inverter's "Start" or "Minimum" voltage during daytime hours.
Address Grid Caps: If "Grid power limitation" is frequent, investigate the feasibility of installing on-site battery storage to capture the excess energy for discharge during non-limited hours.
Hardware Verification: Ensure the selected inverter model's Imax (maximum input current) is compatible with the Isc (short circuit current) of your modules, especially if using high-current bifacial panels.