Irradiance
Irradiance is the amount of solar energy received by a surface per unit area (for example, square meters). For photovoltaic (PV) systems, this variable is measured plane of array irradiance (GPOA) provided by sensors (pyranometers or weather stations).
The Monitor module provides real-time irradiance values for the entire portfolio, selected sites, and individual devices (inverters).
Irradiance calculation
GPM Horizon refines the raw measurements through a process of data cleansing to provide accurate and relevant values.
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Remove 5-minute measurements that fall out of range (0W/m2-1400 W/m2).
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Remove anomalies (readings with values equal to zero when other sensors provide values higher than zero).
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Remove missing readings (null values).
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Calculate the 75th percentile of all the valid irradiance measurements.
Aggregation methods
At each level of the portfolio, GPM Horizon aggregates and ponders the data used for the calculation, to provide relevant metrics at each level while preserving accuracy and reliability.
Level | Aggregated variables |
Site |
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Portfolio |
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Time | Aggregated variables |
Less than daily |
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Daily |
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Multiple days |
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