SMA SB 3800-U - Manual (Page 65)

Displays and Messages
SB3800U-12:SE2006 SMA America 7-17
Measuring Channels
The communication options support 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)
The BFR and SRR are redundant processor control systems for the utility protection
functions.
Measuring Channels
Vpv : PV input voltage
Vpv Setpoint: MPPT DC voltage target
Iac : Grid current
Vac : Grid voltage
Fac : Grid frequency
Pac : Power fed to grid
Vpv-PE: PV-voltage to earth (For troubleshooting PV ground faults)
Ipv : PV current
E-Total : Total energy yield
h-Total : Total operation hours
h-on: h-on indicates how long sufficient DC voltage has been applied to
the Sunny Boy and the Sunny Boy has been active including the time
it was not able to feed to the utility with respect to low DC voltage
or operation in stop mode.
Power On : Total system start-up counter
Serial Number : Serial number of the Sunny Boy
Mode : Current operating mode
Grid Type: Type of grid the Sunny Boy is connected to
Error : Description of fault