User Manual
28
3.6.9 Connect the DC input cable
In order to make full use of the DC input power, the PV strings of the same input MPPT should be identical in
structure, including the same model, the same number of panels, the same tilt angle, and the same azimuth.
DANGER
1.
When the sun shines on the panel, it will generate voltage, which may cause life-threatening. Therefore, if
the DC input line is connected under light conditions, you need to ensure that the input line is not charged
(you can cover the panel with an opaque cloth and then proceed operating)
2.
Before connecting the input line, make sure that the DC side voltage is within the safe voltage range (ie
within 60 VDC) and the inverter "DC SWITCH" is in the "OFF" state, otherwise the high voltage generated
may cause a shock hazard.
3.
When the inverter is running in the grid, it is forbidden to perform maintenance operations on the DC input
line, otherwise it will cause electric shock hazard.
4.
If you want to remove the positive and negative connectors, make sure that "DC SWITCH" has been
placed in the "OFF" state.
CAUTION
Please ensure that the following conditions are met, otherwise it may cause a fire hazard.
Each component of the string in series is of the same specification.
The maximum opening voltage of each PV string cannot be greater than 1100 VDC under what
circumstances.
The maximum short-circuit current of each PV string shall not exceed 18A under any conditions.
Ensure that the polarity input on the DC input side is correct, that is, the positive pole of the PV module is
connected to the positive pole of the DC input terminal of the inverter, and the negative pole is connected
to the cathode of the DC input terminal of the inverter.
Precautions for grounding the PV string
If the inverter is directly connected to the N-line of the power grid and connected to the PGND line
(such as the low-voltage distribution network or the N-line and ground-connected power grid), the
positive or negative pole of the PV string is prohibited from being grounded, otherwise the inverter will
not be able to normal work.
DC input terminal selection
Number of input channels
DC input terminal
1
PV1
2
PV1
、
PV2
3
PV1
、
PV2
、
PV3
4
PV1 ~ PV3
、
PV4
5
PV1 ~ PV4
、
PV5
6
PV1 ~ PV5
、
PV6
7
PV1 ~ PV6
、
PV7
8
PV1 ~ PV7
、
PV8
9
PV1 ~ PV8
、
PV9
…
…
14
PV1 ~ PV13
、
PV14
