Greenbyte Documentation

Reference Current Normalized

Reference Current Normalized enables string and combiner box monitoring in solar sites. The Reference Current Normalized for a combiner box is calculated based on all the String DC Normalized Current available in the combiner box.

String monitoring: Since it is expected that all strings have similar DC Current Normalized, the Reference Current can be used in alerts to identify situations when the string current deviates beyond an acceptable limit. For example, you can configure an alert to trigger when the difference between String Normalized Current and Reference String Current is >20%;

You can also plot Reference Current Normalized in a heatmap. Under standard operating conditions, the Reference Current for all combiner boxes should be very similar, so any deviation can be easily noticed using a heatmap.

Note

This signal must be enabled by Greenbyte. To use it, please contact support@greenbyte.com.

Technology

Solar: String, Combiner Box

Equation
reference_current_normalized_eq.jpg

where:

IDCNorm,Reference

is the Reference Current Normalized

IjDCNorm

is the DC Normalized Current of the strings in the combiner boxes

P

is the user-defined percentile threshold defined as metadata at the site level. If it is not defined, a default threshold of 85th percentile is used.

For more information on percentiles, please refer to: https://en.wikipedia.org/wiki/Percentile

Inputs
reference_current_normalized_in.jpg
Example

Reference Current Normalized plotted in a signal heatmap widget to find underperforming combiner boxes.

reference_current_normalized_ex.png