Hopewind hopeSun 10KTL, Руководство пользователя

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3 System installation
25
3.6.8 Connect DC input cables

In order to make full use of the DC input power, the photovoltaic string of the same input MPPT should have
the same structure, including the same model, the same number of panels, the same inclination and the
same azimuth.
1. Sunlight will produce voltage on the battery panels, which may cause life danger. So connect the DC input
line under the condition of light, you need to ensure that the input line is not live (the battery panels can be
covered with an opaque cloth before operate).
2. Before connecting the input line, make sure that the DC side voltage is within the safe voltage range (that
is, within 60VDC), and the inverter "DC SWITCH" is in the "OFF" state, otherwise the resulting high voltage
may cause electric shock.
3. It is forbidden to perform maintenance operations on the DC input line when the inverter is connected to
the grid, otherwise it will cause electric shock.
4. If you want to remove the positive and negative connectors, please make sure that "DC SWITCH" has
been put into "OFF" state and there is no current output from the PV branch.
Please ensure that the following conditions are met, otherwise it may cause a fire hazard.

Each serially connected component of the string is of the same specification and model.

The maximum opening voltage of each PV string cannot be greater than 1100VDC under any
circumstances.

The maximum short-circuit current of each PV string should not exceed 15A under any conditions.

Ensure that the polarity of the DC input side is connected correctly, that is, the positive electrode of the
photovoltaic module is connected to the positive electrode of the DC input terminal of the inverter, and the
negative electrode is connected to the negative electrode of the DC input terminal of the inverter.

Precautions for PV string grounding
If the inverter is directly integrated into the power grid and the N cable is connected to the
protective ground cable (such as a low-voltage power distribution grid or a grid where the N cable
is connected to the ground cable), the positive or negative poles of the photovoltaic string are
forbidden being grounded, otherwise the inverter will not be able to work normally.

Steps of crimping MC4 terminal
The input cable needs to be crimped into MC4 terminals in order to connect with the PV+/PV-
terminals of the string inverter. Before operation, make sure that "3.6.4 Preparation before
operation" is completed.
1. Make sure the positive and negative poles of the input cable have been confirmed and
marked.
Note: Please do not judge the positive and negative according to the cable color in this manual. Be sure to
refer to the actual measurement.
2. Strip the wire with a wire stripper.
Figure 3-13 Stripping
3. According to the correct polarity, crimp the cable to the corresponding core.