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 and Downloads
String.bloxx 124 EM Features
- 24 Solar String Inputs
- Variants for 1000 VDC and for 1500 V system design 1000VDC system design “string.bloxx 124 EM 1500V” 1500VDC system design “string.bloxx 124 EM 1500V”
- 24 Analog inputs for current measurements + 26 A string current (calibrated), + 312 A summary @60°C
- 1 Analog input for voltage measurements 0-1000 / 0-1500 VDC 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, (optional OEM protocols)
- Connectivity Data logger (e. g. Q.reader) and www.gantner-webportal.com for worldwide access or other 3rd party applications
- Electromagnetic Compatibility according to EN 61000-4 and EN 55011
- Power Supply 18 .. 36 VDC
- DIN rail or wall mounting according to DIN 50022