TRUSTEC Phase Balancer Kit:

Trustec SensorKit

Power balance for your PV system - PLATINUM inverters* are equipped with the PhaseBalancer function as a standard. This function monitors the phase unbalance determined by the network operator and reduces the inverters' power if necessary.
Phase unbalance is the difference between the nominal AC powers on the three mains phases. The inverters communicate via the PLATINUM PhaseBalancer cable. The use of a PhaseBalancer cable requires a group of three inverters feeding in single phases. The admissible phase unbalance and reaction time required by the energy suppliers can be set directly and individually for your system on the PLATINUM inverter.

* S series as of 01/26/2010, TL series as of 01/05/2010