Sunny Boy 2500U Installation and Operator’s Manual
SB2500U-11:NE - 41 - SMA Regelsysteme GmbH
4.6 Measuring Channels and Messages
The communication supports a number of measuring channels and messages from the
Sunny Boy inverters.
The following abbreviations are used:
BFR Betriebsführungsrechner (Sequential Control System)
SRR Stromregelungsrechner (Current Control System)
Measuring Channels
Vpv PV-input voltage
Vpv-Setpoint PV-desired input voltage of the Vpv-control
Iac current to the grid
Vac grid voltage
Fac grid frequency
Pac power fed to grid
Zac grid impedance
Vpv-_PE PV-voltage to earth
Ipv current from PV-panels
E-Total energy yield
h-Total total operation hours
Power On total system start ups
Serial Number Sunny Boy serial number
Mode operating mode
Error failure description for mode “disturbance“
Mode Messages
Stop manual system stop
Offset offset calibration of the electronics
Waiting grid switching-on conditions are not fulfilled (yet)
Grid monitoring checking grid (grid impedance)
MPP-Search PV voltage is determined and set
MPP Sunny Boy is in MPP mode
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