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Next Tracker Plugin

Purpose

The purpose of this plugin is to collect data from NEXtracker units via Modbus.

Usage

This plugin reads data from the NEXTracker Solar Tracker network (https://www.nextracker.com/). It uses the Modbus specification, and collects data via TCP. It will be run every 5 minutes, by default. Sensor data will be collected to the tracker table. There are different configuration files reflecting the different number of SPCs in each NCU. The following configuration files available are for trackers with the following number of SPC units: 26, 32, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105. In order to find the total number of SPCS in an NCU, run the discovery configuration file called NCU_discovery.txt. Do not collect this data to the cloud.

The NEXTracker will be interrogated for the following available data, for each SPC:

Variable Name               Units
=================================
Tracking Mode
Battery Temperature         °C
Battery Voltage             V
Last Motor Current          A
PCB Temperature             °C
PV Voltage                  V
PV Current                  A
Tracker Position            °
Target Position             °
Status

Arguments

Arguments are as follows:

  • endpoint. This is either a serial device like /dev/ttyS0 or an IP or DNS like 192.168.1.15

  • Configuration File: This is a file that matches the SPCs in the NCU, for the Nextracker.

  • --port. This is an optional parameter used in an Ethernet gateway, and is the TCP port used for the gateway. Default is 502

  • --attempts. This is an optional parameter, and determines how many times to times to attempt to read an inverter value. Default is 1

  • --delay. This is the delay in seconds between inverter send and receive commands, AND if attempts > 1. Fractions like 0.3 can be used. Default is 0.05

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