SMA SMC 6000TL Installation - Manual (Page 9)

SMA Solar Technology AG Safety
Installation Guide SMC6-8TL-IEN101040 9
2 Safety
2.1 Appropriate Usage
The Sunny Mini Central is a PV inverter, which converts the DC current of the PV generator to AC
current and feeds it into the public grid.
Operating Principle of a PV System with Sunny Mini Central
The Sunny Mini Central may only be operated with PV generators (modules and cabling) of
protection class II. Do not connect any sources of energy other than PV modules to the Sunny Mini
Central.
Capacitive Discharge Currents
PV modules with large capacities relative to ground, such as thin-film modules with cells on
a metallic substrate, are only to be implemented if their coupling capacity does not exceed
1400 nF.
During grid feeding, a discharge current flows from the cells to ground. The amount of
current depends on the manner in which the modules are installed (e.g. foil on metal roof)
and on the weather (rain, snow). This "normal" discharge current may not exceed 50 mA
due to the fact that the inverter would otherwise automatically disconnect from the grid as
a protective measure. For further information on this subject, see the technical information
"Capacitive Discharge Currents" in the download area at www.SMA.de/en.