• string.bloxx 116 (16 channels)

string.bloxx  124  E  1000V / 1500V 

Effective PV monitoring requires constant, solid and traceable PV plant monitoring data in order to determine actual performance and fulfil owner/investor expectations.

Operators are interested to identify errors and losses in a reliable way to trigger appropriate actions for maximizing energy harvest during the total system lifetime.

With the monitoring of PV module strings, design and production errors will be recognized on the DC side with high resolution down to PV module level.

Using DC shunts (vs. hall effect sensors) the string.bloxx provides current measurements typically 10 times more accurate and not susceptible to temperature variance. This equates to higher accuracy measurements and better understanding of true system performance. In addition, string voltage (up to 1000V) and DC power on every string can be continuously monitored ensuring maximum system productivity.

Continuous measurement of both cabinet and panel temperatures, along with overvoltage monitoring and main switch control greatly and improves system diagnostics.

This accurate measurement is inverter independent and gives feedback about losses due to inverter malfunction, soiling, shading, PV Module degradation etc. .

The string.bloxx communication uses industry standard Modbus protocols for easy and fast integration and reliable data exchange with the data logger. For longer communication distances fiber optic technology is used.

Key features

Connection for strings Up to 24 PV strings
Analog inputs for current measurements 24 channels
 String current -4A to + 13 A string current (calibrated), + 312 A summary @60°C
 Analog input for voltage measurements 1 channel, 0-1000 V / 1500V string voltage
2 Digital inputs Monitoring of overvoltage protection and main switch
Signal conditioning Calculated DC Power, linearization, mean value, scaling, alarm
RS485 fieldbus interface Up to 115.2 kbps: Modbus-RTU, ASCII (optional OEM protocols)
Connectivity Data logger (e.g. Q.reader) and gantner.webportal for worldwide access or other 3rd party applications
Electromagnetic Compatibility According to EN 61000-4 and EN 55011
Power Supply 18 up to 36 VDC
Mounting DIN rail or wall mounting according to DIN 50022

Functional Scheme