SMA STP 8000TL-10 - Manual (Page 9)

SMA Solar Technology AG 2 Safety
Installation Manual STP8-17TL-IA-en-31 9
2 Safety
2.1 Intended Use
The Sunny Tripower is a PV inverter which converts the direct current of a PV array into alternating
current and feeds this into the electricity grid.
Principle of a PV plant with the Sunny Tripower
The Sunny Tripower may only be operated with PV arrays (PV modules and cabling) of protection
class II. Do not connect any energy sources other than PV modules to the Sunny Tripower.
String connections on Sunny Tripower 8000TL, 10000TL and 12000TL
The Sunny Tripower 8000TL, 10000TL and 12000TL only have 4 string connections at input A.
Capacitive leakage currents
PV modules with large capacities relative to earth, such as thin-film PV modules with cells on a
metal substrate, may only be used if their coupling capacity does not exceed 2.55 μF.
During feed-in operation, a leakage current flows from the cells to earth, the size of which
depends on the manner in which the PV modules are installed (e.g. foil on metal roof) and on
the weather (rain, snow). This "normal" leakage current must not exceed 90 mA, as otherwise
the inverter would automatically disconnect from the electricity grid as a protective measure.
For further information on this subject see the Technical Information "Capacitive Leakage
Currents" at www.SMA.de/en.