# Power On/Off Operation

### Pre-operation Inspection

Ensure there is no visible damage on the product appearance and all circuit breakers are in the OFF position. Before operation, inspect the equipment following these steps:

1，Check whether the battery, high-voltage box, energy storage inverter, etc., are reliably grounded (i.e., check that the protective earth ground of the system is properly connected). Measure the insulation resistance to ground using an insulation tester (i.e., insulation resistance of HV box input positive/negative to ground, HV box output positive/negative). Reliable grounding is confirmed when the insulation resistance is greater than or equal to 10 MΩ.

2，Check that the wiring polarity is correct, all connections are secure, and the cables are intact.

3，Check that the voltage ranges on the battery side, PV side, and grid side inside the energy storage inverter are within the specified values, and verify that the battery cluster voltage is within the reasonable range.

4，Check that all indicator lights are off.

### Power On and Off Procedures

<div align="left"><img src="/files/df72aca41075dca7b1a352baa62bb40a04c1b05c" alt="" width="188"></div>

When an abnormality occurs in the system, please disconnect the circuit breaker on the high-voltage box immediately.

#### Power On

<div align="left"><img src="/files/99b178baca340df79332f9b88f8d2ec8522443f6" alt="" width="188"></div>

Operate in the following sequence to avoid any damage.

A. Close the Battery breaker of the high-voltage box.

<img src="/files/116803ceea97519fdbc783a509aa3a83f0b9a6e0" alt="" width="375">

B. Close the PV side switch of the inverter.

<img src="/files/cdca68a3ac90f8740780ba75b99c99eb3748151e" alt="" width="375">

The instructions for the indicator lights on the high-voltage box / inverter are shown in the table below:

High-voltage

<img src="/files/31c2f0574523e4d776ac6df951079a8a7fc4e3fe" alt="" width="375">

<table><thead><tr><th width="81">Num</th><th width="153.66668701171875">Definition</th><th>Note</th></tr></thead><tbody><tr><td>1</td><td>SOC ≤ 5%</td><td>The first cell on the left flashes every 3 seconds</td></tr><tr><td>2</td><td>5&#x3C; SOC ≤ 25%</td><td>The first cell on the left is on</td></tr><tr><td>3</td><td>25&#x3C; SOC ≤ 50%</td><td>The first and second cells on the left are on</td></tr><tr><td>4</td><td>50 &#x3C; SOC ≤ 75%</td><td>The first, second and third cells on the left are on</td></tr><tr><td>5</td><td>75&#x3C; SOC ≤ 100%</td><td>All cells are on</td></tr></tbody></table>

Inverter

<img src="/files/4bec24685738b7b2f7f4f560901bb2ae16ba753c" alt="" width="563">

#### Power Off

The system shall be shut down following the steps below:

1. Turn off the PV side switch of the inverter.
2. Disconnect the Battery breaker of the high-voltage box.

<div align="left"><img src="/files/4ef63046115dcb664c5a1470f54c532ef1225fc2" alt="" width="188"></div>

After the system is powered off, residual electricity still remains. Wait approximately 15 minutes before performing any electrical-related operations. Before operation, you must measure with a multimeter to ensure the system has no voltage.


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