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3.5 System Architecture
The following figure shows inverter application in a PV energy storage system.
DC
AC
Communication
PV string is composed of series connected PV panels.
Protected house loads, connected to inverter EPS (backup) port, which
need uninterrupted power supply.
Normal household loads, which will be lack of power when grid is
blackout.
The CT (Current Transformer) is default delivered with the inverter, the
smart meter needs to be purchased from the inverter manufacturer.
Utility grid, supported Grid Types: TT，TN-C，TN-S, TN-C-S. For the gird
structure with N cable, the effective value of the voltage between the
neutral wire and the ground wire must be less than 10V.
When the inverter is used in TT and IT systems, it is required that the
inverter casing must be grounded, and the default ground fault detection
function can be turned off through the APP.
Select the battery model according to the approved battery list.
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