SMA STP 15000TL Installation - Manual (Page 9)

SMA Solar Technology AG Safety
Installation Manual STP20TLHE-IA-IEN122222 9
2 Safety
2.1 Intended Use
The Sunny Tripower is a PV inverter which converts the direct current of the PV array to grid-compliant
alternating current and performs three-phase feed-in into the electricity grid.
Principle of a PV plant with this Sunny Tripower
The Sunny Tripower is suitable for indoor and outdoor use.
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.
When designing the PV plant, ensure that the values comply with the permitted operating range of all
components at all times. The free design program "Sunny Design" from version 2.0
(www.SMA.de/en/SunnyDesign) will assist you in this. The manufacturer of the PV modules must
have approved the PV modules for use with this Sunny Tripower. You must also ensure that all
measures recommended by the module manufacturer for long-term maintenance of the module
properties are taken (see also Technical Information "Module Technology" at www.SMA.de/en).
Do not use the Sunny Tripower for purposes other than those described here. Alternative uses,
modifications to the Sunny Tripower or the installation of components not expressly recommended or
sold by SMA Solar Technology AG void the warranty claims and operation permission.
Capacitive Discharge Currents
PV modules with large capacities relative to earth, such as thin-film PV modules with cells
on a metallic substrate, may only be used if their coupling capacity does not exceed
500 nF.
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 may not exceed 50 mA due to
the fact that the inverter would otherwise automatically disconnect from the electricity grid
as a protective measure. For further information on this subject see the Technical
Information "Capacitive Discharge Currents" at www.SMA.de/en.