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In the following system level technical description, the precise functions are explained to the
installer, as well as the user, which are required for the installation, operational start-up and han-
dling of the solar inverter.
The content of renewable energy with respect to overall power consumption worldwide is increas-
ing annually by approximately 25%. The reason for this rise can be primarily attributed to the con-
stantly increasing demand for power, the increasing interest in environmentally friendly technolo-
gies, as well as the increasing costs of non-renewable energy.
By the use of renewable energy sources, the earth‘s atmosphere can be enormously relieved of
increases in CO2 and other harmful gases which result from power generation.
The solar inverter converts direct current from the solar cells into alternating current. This enables
you to feed your self-produced solar energy into the public grid.
Thanks to ecient MPP tracking, maximum capacity utilization of the solar energy plant is en-
sured even in cases of misty and cloudy skies.
The string concept means that PV modules are always connected in series (in a string) and/or
that strings with the same voltage are connected in parallel to the solar inverter with the aim of
signicantly reducing the photovoltaic system’s cabling requirements.
The fact that the modules are connected in strings also means that the photovoltaic system can be
perfectly matched to the solar inverter’s input voltage range.
The inverter is transformerless type without galvanic isolation. Therefore, the inverter may only be
operated with ungrounded PV arrays. Furthermore, the PV array must be installed in accordance
with the NEC690.35 (Ungrounded Photovoltaic Power Systems) and the locally valid regulations for
ungrounded PV arrays. Additionally, the PV array (PV modules and cabling) must have protective
insulation and the PV modules used must be suitable for use with this inverter. PV modules with
a high capacity to ground may only be used if their coupling capacity does not excessed 1,200 nF
with 60Hz grid.
2.1 System
If a high voltage(HV) battery is connected to the Delta E series inverter, it must be ac-
tivated before use. This setting can be done in factory test or via APP after installation.
HV battery communicates with Mario E series inverter through RS485 or CAN. And the
battery must comply with the specications of UL1973.
For DC-couple system, PV panel works in MPPT mode or power reduction mode ac-
cording to system orperationa mode. And the maximum number of PV string is three.
For AC-couple system, there may be no solar module connected to Delta E series
inverter, and the PV power option will be deactivated.
The Delta E Series inverter manages battery and system energy.
Delta E Series
PV Panel
HV Battery
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