Product Introduction; Operation Modes Introduction - Goodwe ET Series User Manual

User Manual V1.2-2022-03-30

01 Product Introduction

The ET series and ET Plus series, also called hybrid or bidirectional solar inverters, provides
energy management in a PV system that includes solar modules, a battery, loads, and utility grid
connection. Energy produced by the PV system is prioritized to supply loads and then any excess
energy to charge the battery. When the battery is fully charged, excess energy can be exported to
the utility grid (if permitted). The inverter power rate limit (WGra) is not applicable to operate the
mode of Changes in energy source operation.
The battery shall discharge to support loads when PV power is insufficient to meet self-
consumption needs. If battery power is not sufficient, the system will take power from the utility
grid to support loads.

1.1 Operation Modes Introduction

ET system normally has the following operation modes based on your configuration and layout
conditions.
Mode I
The energy produced by the PV system is used
to optimize self-consumption needs. The excess
energy is used to recharge the batteries, any
remaining excess is then exported to the grid.
Mode III
(If backup function is included) When the grid
fails, the system will automatically switch
to back-up mode. The back-up loads can be
supplied by both PV and battery energy.
The preceding introduction describes the general operation
of the ET system. The operation mode can be changed
with the PV Master app based on the system layout. The
possible operation modes for the ET system are shown
below.
1
Product Introduction
Mode II
If the PV system is currently not generating
any electricity and the battery is charged,
loads are supplied with electricity from the
battery and the grid.
Mode IV
Battery could be charged by grid, and
charge time/power could be set to various
options on the PV Master App.