The perfect solution for varying requirements

Large Plants

Solar-Log™ PM Packages
String Monitoring Box (SMB)
String Connection Box (SCB)
Solar-Log™ Utility Meter
Solar-Log™ PM Box 1200 / 2000

Solar-Log™ PM Packages

Grid operators employ a wide range of signals that are required for feed-in management and that are used to send commands and the response signals. The Solar-Log™ PM Package is a single system to implement the various requirements with minimum effort. The PM Package consists of I/O Boxes and PM profiles. The I/O Boxes are a flexible gateway between remote control technology and the Solar-Log 2000.  The input and output signals from the I/O Boxes are defined by the PM profile according to the grid operator requirement.



Technical data
Inputsup to 4 analog and up to 9 digital
Outputsup to 3 analog and up to 10 digital
Rated operating voltage 

10-24 VDC

*The operator specific PM+ profile needs to be ordered.



Solar-Log™ String Monitoring Box (SMB)

String monitoring at large plants offers the best way to prevent failures. The Solar-Log™ String Monitoring Box, in combination with the Solar-Log 2000 and the Solar-Log WEB Enerest™ XL, provides the optimal solution when upgrading to string monitoring. The Solar-Log™ SMB is employed if the SCB that is already present only links.

Solar-Log™ SMB-C

Control Unit for the communication with the Solar-Log™ including measuring unit for 16 strings

Solar-Log™ SMB-M

Measuring unit for 16 strings



Product comparisonSolar-Log™ SMB-CSolar-Log™ SMB-M
Measuring number of strings2 x 8 Strings2 x 8 Strings
Measuring range per string0 - 20 A, < 1% tolerance0 - 20 A, < 1% tolerance
Diameter for the cables10 mm10 mm
Temperature range-20 °C-20 °C
Protection ClassIP65IP65
Dimensions (w x h x d) in mm300 x 400 x 200300 x 400 x 200
Power supply23 V DC - 30 V DC (Not included in delivery)via Solar-Log™ SMB-C
Power consumptionMax. 800 mAvia Solar-Log™ SMB-C
Warranty1 year1 year


String Connection Box (SCB)

By using SCBs, the DC output from the individual strings is switched in parallel and connected to the central inverter. Recording the power per string and the transmission of the SCB measurements allows for performance monitoring at the string level.

The Solar-Log™ combined with the Solar-Log WEB Enerest™ monitors and compares every individual string, ensuring reliable and precise PV plant monitoring. The currents from the individual strings are compared with each other for error identification and localization. Disturbances that result in yield decreases are immediately detected and can be fixed.



Solar-Log™ is compatible with the following SCBs

Solar-Log™ devices support SCBs from various manufacturers. Please refer to the component database on our website for details on the supported SCBs and manufacturers (Service & Support / Supported components).



Solar-Log™ Utility Meter

The Solar-Log™ Utility Meter is a universal metering device. It can be integrated in both low- and medium-voltage networks (via a transformer) and is needed for various tasks. In addition to voltage-dependent reactive power control Q(U), it is also used for reactive power control at the feeding point and to record the data that is needed consumption meter for heavy loads.



Technical data
Voltage measurement17 V-520 V L-L, 4 inputs
Current measurementMax. 5A
InterfaceRS485
Rated operating voltage135-340 VDC voltage supply
MountingTop hat rails, 95-240 VAC /
135-340 VDC voltage supply
Warranty1 year

Solar-Log™ PM Box 1200 / 2000

In some countries, the grid network capacity for feed-in energy produced by a solar PV installation is becoming more of a concern, with some G59/3 applications even being rejected completely by the responsible DNO. In other areas, grid saturation constraints lead to stipulated maximum reverse power limits imposed by the DNO, which is often far less than the peak theoretical limit that the Solar PV array can produce.

The Solar-Log™ PM Box combines the inherent power management capabilities of Solar-Log™ control systems with a fail-safe backup unit, should the control system fail or ceases to be effective. This solution is a standardized, yet scalable framework to provide dynamic, closed-loop power management control over the inverter bank, suitable for up to 2 MWp size arrays and can be implemented globally.