CMV Measurement

To guarantee the safe and stable operation of an SMA Storage XL Package battery system, the CMV requirements must be met (CMV: common-mode voltage, voltage between DC pole and ground). In battery systems with more than four Sunny Tripower Storage X inverters, a CMV measurement must be performed and the results recorded in the commissioning report.

Evidence of the CMV requirements being met takes the form of a measurement in the entire system following installation during operation with the power electronics connected. The CMV measurement may only be performed by electrically qualified persons in compliance with the safety rules and in cooperation with Service. You must therefore contact Service to make an appointment if SMA Storage XL Package battery systems with more than four Sunny Tripower Storage X inverters are to be commissioned.