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Greenbyte Documentation

Normalized Power

The Normalized Power signal shows how an individual inverter is performing when its capacity (that is, how it should perform) is normalized against the capacity of all of the inverters connected to the primary meter.

The Effective Power of the inverter is multiplied by the average capacity of all inverters of the site divided by the capacity of this individual inverter. In simple terms:

Normalized_Power_-_Description.png

Whether AC or DC capacity is utilized depends on clipping. If clipping does not occur on a given day (the Effective Power is less than or equal to the AC capacity of the inverter) the DC capacities are normalized. If clipping does occur, the AC capacities are normalized.

Technology

Solar

Remarks

This is an inverter-level signal, used as an input signal for Production-Based Availability (Inverter Normalized).

In order for Normalized Power to have a value the inverter must follow the Rules for Referencing Devices that concern Primary meter mapping, and also that all inverters mapped to the same Primary meter have metadata values specified for both AC and DC capacity:

  • DC Capacity (kWp) (Inverter metadata 7)

  • AC Capacity (kW) (Inverter metadata 30)

Equation
Normalized_Power_-_Equation.png

Where:

Pnorm

is the Normalized Power

AC

is the average of the AC capacity (Inverter metadata 30) of all inverters with the same primary meter

CAC

is the inverter’s AC capacity (Inverter metadata 30)

DC

is the average of the DC capacity (Inverter metadata 7) of all inverters with the same primary meter

CDC

is the inverter’s DC capacity (Inverter metadata 7)

Peffective

is the Effective Power

Inputs
Normalized_Power_-_Inputs.png
Usage Example

Normalized Power is plotted against Effective Power here, showing that the Normalized Power was slightly greater than Effective Power on this day. However, since Normalized Power is only a helper signal for Reference Normalized Power, this should rarely be utilized on its own.

Normalized_Power_-_Usage_Example.png