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2 Product Introduction
2.1 Intended Usage
SG2K5TL-S, SG3KTL-S, SG3K6TL-S, SG4KTL-S, SG4K6TL-D and SG5KTL-D (They will be
referred to as inverter hereinafter unless otherwise specified), single-phase without
transformer string inverter, is a crucial unit between the PV arrays and the utility grid
in the small-scaled PV power system.
Inverter is dedicated to converting direct current power generated by the PV
modules into alternating current, which conforms to parameters of local utility grid,
and feeds the alternating current into the utility grid. An example about intended
usage of the inverter is shown in Fig. 2-1.
Where the positive or negative terminal of PV strings needs to be grounded,
inverter cannot be connected to PV modules of this type.
BC
D
L
N
PE
Fig. 2-1 Application of Inverter to the PV Power System
Item Description Remar
A PV strings
Monocrystalline silicon; polycrystalline silicon and
thin-film of protection class II without grounding
B Inverter
SG2K5TL-S, SG3KTL-S, SG3K6TL-S, SG4KTL-S, SG4K6TL-D
and SG5KTL-D.
C
Metering
device
Meter cupboard with power distribution system
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