String combiner box

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String combiner box String combiner box - SCBS



Successful detection of yield-reducing factors in commercial photovoltaic systems and in PV power plants depends largely on the monitoring system's design. Yield monitoring on the string level plays a particularly important role for systems with central inverter concepts in order to locate possible power losses in the PV generator as quickly as possible and thus to assure the long-term expected performance level of the PV system.

For this purpose, our string combiner boxes (SCBs) provide precise measured value recording of all electrical indicators (string current, system voltage, total current and total power) as well as the option of monitoring the status of the surge arrester, DC circuit breaker, door contact and the interior cabinet temperature.

The SCB also fits perfectly into the relevant system topology. As a result, it facilitates safe and, above all, accurate monitoring that is independent of any project-specific string layout and grounding concept.

We would be delighted to offer you a tailor-made solution to suit your personal and project-specific requirements.


Measurement of 8 to 24 individual strings or 16 to 48 strings with double assignment
Individual string protection in the positive or in the positive and negative poles
Integrated surge arrester
Integrated DC circuit breaker
Comprehensive status monitoring
System voltages up to 1,500 V DC
Manufacturer-independent, open Modbus RTU protocol
Glass fiber-reinforced plastic casing for harsh industrial use
Pre-configuration for easy connectivity to the data loggers WEB’log and blue’Log X-Series
High level of expandability