The production data in Reports is calculated by using the Active Power signal from generating units (wind turbines, inverters).
The formula used is:
Production (kWh) = Active Power (kW) * LogIntervalInMinutes / 60
This is a formula for calculating energy production from power measurements taken at regular intervals.
The core idea: Power is the rate of energy production, and energy is power multiplied by time. Since the data is logged at fixed intervals (e.g., every 10 minutes), you can estimate total energy produced during each interval.
Breaking down the formula:
Production (kWh) = Active Power (kW) × LogIntervalInMinutes / 60
Active Power (kW) — the instantaneous power output reading from a turbine or inverter at each logged data point
LogIntervalInMinutes — how often data is recorded (e.g., every 10 minutes)
÷ 60 — converts minutes to hours, since energy is measured in kilowatt-hours
Example: If a wind turbine reports 500 kW and the log interval is 10 minutes:
500 kW × 10 / 60 = 83.33 kWh produced in that interval.
Important nuance: This is an approximation. It assumes the power output was constant throughout each interval. The shorter the log interval, the more accurate the estimate — a 1-minute interval will track real output more faithfully than a 60-minute one. This is essentially a Riemann sum approximation of the integral of power over time, which is the true energy produced.