Preface - Steca Grid 8000 Bedienungsanleitung

EN
1

Preface

Always symmetrical
The advantage of three-phase feeding is that the produced solar capacity is always symmetrically
distributed on all three power conductors to the public power grid. This is the case across the whole
output range offered by these inverters. When designing a system, the laborious work involved in
avoiding asymmetry of more than 4.6 kW through the correct selection of separate inverters is thus
dispensed with. Symmetrical feeding is greatly in the interests of energy supply companies. Lengthy
discussions with such companies are therefore a thing of the past.
Long service live
While the voltage passes through zero on the grid-feeding phase, single-phase inverters must
temporarily accommodate all energy supplied by the solar modules within the device. This is usu-
ally realised by electrolytic capacitors. These components influence the service life of an electronic
device, due to the possibility of drying out. With three-phase inverters, energy is fed into the grid on
at least two phases at all times. Thus, the necessity of intermediate storage of energy in the device
is greatly reduced, which is of benefit to the system operator with regard to a longer service life (see
Fig. 1 and Fig. 2).
Flexible connection
Due to the wide input voltage range and a high input current, all commonly available crystalline
solar modules can be connected to the inverters in various configurations. Beyond this, the system is
also approved for use with CdTe and CIS / CIGS thin-film modules (see www.stecasolar.com/matrix).
Four plug/socket pairs are available for flexible, mechanical DC connection.
Easy handling
The graphical LCD display is able to visualise the energy yield values, current performance and
operating parameters of the system. Its innovative menu allows individual selection of the various
measurements. The guided, pre-programmed menu allows easy initial commissioning of the device.
Despite their high output, the inverters can be mounted to the wall. Thanks to the high degree
of protection, the inverters can be installed indoors or outdoors. Due to the integrated DC circuit
breaker, installation work is made easier, and the installation time is reduced. It is not necessary to
open the inverter during installation.
Flexible system design
Combined, the StecaGrid 8000+ 3ph and StecaGrid 10 000+ 3ph inverters allow for an optimal
dimensioning for almost all power classes A diverse range of combinations are possible, but all with
a common target: the effective use of solar irradiation.
Fig. 1: Output P with single-phase grid feeding
Fig. 2: Output P with three-phase grid feeding
42
P
U
P
U
P
U
1
P
U
2
U
U
1
3
U
2
U
3
744.378 | 12.13