# Installation

### Package Inspection

Before unpacking, check whether the packaging shows any obvious signs of damage. If any damage is found, do not unpack the product; verify the system model and contact the dealer as soon as possible.

After unpacking, check whether each product is intact. If there is any obvious appearance damage, contact the distributor as soon as possible.

### Scope of Delivery <a href="#toc94904314" id="toc94904314"></a>

Check the scope of delivery and inspect components to ensure they are present and undamaged.

Contact your distributor if the packed components are incomplete or damaged.

**PCS：**

<div align="left"><figure><img src="/files/FPLDN31d5VwXms5yKyxB" alt="" width="563"><figcaption></figcaption></figure></div>

**Battery：**

<div align="left"><figure><img src="/files/shu0LWyQo9Np1a7wbVzk" alt="" width="563"><figcaption></figcaption></figure></div>

**HV Box：**

<div align="left"><figure><img src="/files/YCgaonJOEJLqWdEvKj27" alt="" width="563"><figcaption></figcaption></figure></div>

**Base：**

<div align="left"><figure><img src="/files/Hc0J3TRKQ5tZL4ueN7YQ" alt="" width="563"><figcaption></figcaption></figure></div>

**Other accessories：**

<div align="left"><figure><img src="/files/N8CRAvKnxubXZM4fYPZ6" alt="" width="563"><figcaption></figcaption></figure></div>

### Crane Use

You may install the battery either by lifting it with a crane or without using a crane. If a crane is used for installation, follow the steps below:

<div align="left"><figure><img src="/files/u3vXQNwu14qQJSuSc8Bj" alt="" width="563"><figcaption></figcaption></figure></div>

### Product Installation

#### 1.1.1   Base Installation

1\.        Remove the base from the carton and transport it to the installation site.

2\.        Ensure that the installation site meets the requirements in Section 1.6.

3\.        First install the leveling feet and level the base according to the spirit level on the base.

4\.        After leveling is completed, install the positioning posts included in the accessories.

<p align="center"> <img src="/files/ygHivtwbVtVY8BZyaHie" alt=""></p>

#### Battery Installation

**Notice：**

The batteries shall be installed row by row; single-column installation is not allowed.\
Each base can accommodate a maximum of 12 battery modules and 1 high-voltage box. Installation of more than 12 battery modules is not allowed.

<figure><img src="/files/MBWmZLVeYGOzek4IXFqN" alt="" width="375"><figcaption></figcaption></figure>

1\.        Open the packaging of the high-voltage box and take out the four handles from the accessories of the high-voltage box.

2\.        Use the handles to remove the battery from the carton, and remove the protective cap from the battery blind-mate connector. At this point, you may choose to install the battery using lifting tools or manually carry and install it.

3\.        Move the battery onto the base. After one battery is installed, take out the positioning post from the battery accessory pack and install it on the battery.

4\.        Install the high-voltage box on the top. (The high-voltage box shall be installed on the right side of the battery, as shown in the figure below.)

5\.        Install the cover plate on the top, then take out the screws from the top cover accessory pack and fasten them onto the top cover.

<figure><img src="/files/oCnzhS2492FQzfYZCdeP" alt="" width="375"><figcaption></figcaption></figure>

<figure><img src="/files/jhmcxD7yREwI9GL9UUtX" alt="" width="375"><figcaption></figcaption></figure>

<figure><img src="/files/QrSrrIg4XafufQyKLa2J" alt="" width="375"><figcaption></figcaption></figure>

Wi-Fi Dongle Installation

1\.        Remove the right-side cover plate of the high-voltage box.

2\.        Check whether the Wi-Fi dongle is properly installed.\
If a 4G dongle is required, it shall be ordered separately and used to replace the Wi-Fi dongle.

**Note that AlphaESS always recommends a LAN cable connection over the use of a Wi-Fi dongle.**

<figure><img src="/files/wuoJNtJ0oN0LpLBp8wDQ" alt="" width="375"><figcaption></figcaption></figure>

#### 1.1.3   PCS Installation

1\.        Install the inverter on a wall or structure capable of bearing its weight.

2\.        The inverter must be installed vertically, with a maximum tilt angle of ±5°. Exceeding this angle may result in reduced output power.

3\.        To avoid overheating, ensure that the airflow around the inverter is not obstructed. Refer to Section 1.6.4 for installation clearance requirements.

4\.        Select the installation height of the bracket and mark the positions of the mounting holes. For brick walls, the hole positions shall match the expansion bolts.

5\.        Lift the inverter, align the bracket on the back of the inverter with the raised surface of the mounting bracket, hang the inverter on the mounting bracket, and ensure that it is securely fastened.

<div align="left"><figure><img src="/files/MBYD6OkqrsitsO7RgpNQ" alt="" width="563"><figcaption></figcaption></figure></div>

<div align="left"><figure><img src="/files/TJpcYLdEqh3T233gH8BJ" alt="" width="374"><figcaption></figcaption></figure></div>

#### Other Battery Installation Layouts

If two bases are used, an inter-cluster cable harness shall be ordered separately. This harness is available in 3 m and 5 m options. The detailed layout and wiring are shown below:

<figure><img src="/files/LOVzAsW0xxE52mEln8cc" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/CsmOoJxvd2pEso7MjRdu" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/Pvm8uhcwysGTZnXEuRNd" alt=""><figcaption></figcaption></figure>

<div align="left"><figure><img src="/files/M9yD2PbSC0OJ5vfz9BtR" alt="" width="375"><figcaption></figcaption></figure></div>

### Electrical Connections

#### Cable Requirements

<table data-header-hidden><thead><tr><th width="77.66665649414062"></th><th width="195"></th><th width="530.9999389648438"></th><th width="212"></th></tr></thead><tbody><tr><td>No.</td><td>Cable</td><td>Type</td><td>Source</td></tr><tr><td>1</td><td>PV power cable</td><td>Standard PV cable (recommended type: H1Z2Z2-K)4 ~ 6 mm2</td><td>Purchased  by the installer</td></tr><tr><td>2</td><td>AC power（Grid）</td><td><p>Flexible cable</p><p>50mm2</p></td><td>Purchased  by the installer</td></tr><tr><td>3</td><td>AC power（Backup）</td><td><p>Flexible cable</p><p>20-25 mm2</p></td><td>Purchased  by the installer</td></tr><tr><td>4</td><td><p>Auxiliary Power Wiring</p><p> </p></td><td><p>It is recommended to use 10AWG/6mm² cable</p><p>with a cable overcurrent of ≥35A and an outer diameter of ≤5.2mm</p></td><td>Purchased  by the installer</td></tr><tr><td>5</td><td>PE cable（Battery）</td><td><p>current≥150A</p><p>recommend:35mm²</p></td><td>Purchased  by the installer</td></tr><tr><td>6</td><td>PE cable（Inverter）</td><td>recommend:35mm²</td><td>Purchased  by the installer</td></tr><tr><td>7</td><td>DI/DO</td><td><p>Recommend using three four core wires</p><p>with a diameter of 24AWG/0.2mm ² ~ 22AWG/0.5mm ²</p></td><td>Purchased  by the installer</td></tr></tbody></table>

#### System Grounding

<div align="left"><figure><img src="/files/x9aDuinqjBblvqPNLK9g" alt="" width="128"><figcaption></figcaption></figure></div>

**Electric Shock Hazard**

**Before doing electrical connection, please ensure the PV switch & all AC and BAT circuit breakers in the energy storage system are switched OFF and cannot be accidentally or unintentionally reactivated.**

The energy storage system is provided with grounding terminals on both the battery and the inverter, and both must be grounded during on-site installation.

On the battery side, prepare an M6 OT terminal, strip the insulation from the grounding cable, insert the stripped conductor into the barrel of the OT terminal, and crimp it using a crimping tool.

Use a screwdriver with a tightening torque of 5 N·m to connect the grounding terminal to the battery.

<figure><img src="/files/TG0o8hXtqeQmizseU2PE" alt="" width="563"><figcaption></figcaption></figure>

<figure><img src="/files/xadQh5B1ldODjQnEl1Ir" alt="" width="563"><figcaption></figcaption></figure>

On the inverter side, prepare an M5 OT terminal, strip the insulation from the grounding cable, insert the stripped conductor into the barrel of the OT terminal, and crimp it using a crimping tool.

Use a screwdriver with a tightening torque of 3.5 N·m to connect the grounding terminal to the inverter.

<div align="left"><figure><img src="/files/Dwjor1AMid6WUdNirZkD" alt="" width="315"><figcaption></figcaption></figure></div>

After grounding is completed, the battery grounding shall be checked. Use the positive and negative probes of a multimeter to contact the corresponding positions on the battery and verify whether grounding has been completed successfully.

<div align="left"><figure><img src="/files/QK2lk4MsfVnYbCV4lUZp" alt="" width="359"><figcaption></figcaption></figure></div>

### Battery Wiring

1\.        Remove the side cover plate of the high-voltage box and the side cover plate of the inverter.

<figure><img src="/files/siOZe3sANpYvXXkmssGu" alt="" width="563"><figcaption></figcaption></figure>

2\.        Take out the battery power cable from the accessory pack of the high-voltage box.

3\.        Insert the end of the cable harness with terminals into the BAT+ and BAT− ports of the high-voltage box.

<figure><img src="/files/J9qMe49o36Kd1zWR2Th8" alt="" width="563"><figcaption></figcaption></figure>

4\.        Remove the soft silicone protection from the other end of the cable harness, and route it through the waterproof terminal of the inverter to connect it to BAT+ and BAT−.

<figure><img src="/files/s7NLzaPluYo0KSwJ3g4c" alt="" width="563"><figcaption></figcaption></figure>

<figure><img src="/files/GIVMYIuyuuimDGTHzuIp" alt="" width="563"><figcaption></figcaption></figure>

### PV Wiring

<figure><img src="/files/ciSXqiHLH6MBbOHmOhHW" alt=""><figcaption></figcaption></figure>

A DC-PV1 switch , complied toAS60947 .3 :2018 , within the inverter, is used as isolating device . Please check below ratings .

<table data-header-hidden><thead><tr><th width="193.33331298828125" valign="top"></th><th width="468.66668701171875" valign="top"></th></tr></thead><tbody><tr><td valign="top">DC switch brand</td><td valign="top">SVRU(TIANJIN) ELECTRICAL EQUIPMENT CO. LTD</td></tr><tr><td valign="top">Model</td><td valign="top">GHX6-55P/8P1100- 45-2-O-F</td></tr><tr><td valign="top">PV category</td><td valign="top">DC-PV2</td></tr><tr><td valign="top">Ue</td><td valign="top">1100V</td></tr><tr><td valign="top">le</td><td valign="top">45A</td></tr><tr><td valign="top">Ui</td><td valign="top">1500V</td></tr><tr><td valign="top">Uimp</td><td valign="top">8000V</td></tr><tr><td valign="top">lcw</td><td valign="top">1500A</td></tr><tr><td valign="top">lcm</td><td valign="top">2000A</td></tr><tr><td valign="top">l ( make)/lc(break)</td><td valign="top">180A</td></tr><tr><td valign="top">Complied standard</td><td valign="top">AS 60947 .3：2018 ， ASINZS IEC 60947 . 1 :2015</td></tr></tbody></table>

1\.        Select a suitable DC cable and strip the wires out by 7±0.5 mm . Please refer to the table below for specific specifications；

<figure><img src="/files/N5dVJkEtiNTjWzNhpRns" alt="" width="563"><figcaption></figcaption></figure>

2\.        Take the DC terminal out of the accessory bag , turn the screw cap to disassemble it , and take out the waterproof rubber ring；

<figure><img src="/files/nRgzC2ZK8UBX7GK7BJy2" alt="" width="563"><figcaption></figcaption></figure>

3\.        Pass the stripped DC cable through the nut and waterproof rubber ring；

<figure><img src="/files/nQnpEgfcOC2Zz3g05tiC" alt="" width="563"><figcaption></figcaption></figure>

4\.        Connect the wire part of the DC cable to the metal DC terminal and crimp it with a special DC terminal crimping tool；

<figure><img src="/files/4NnNq4vjEEDd5G1F9lmE" alt="" width="563"><figcaption></figcaption></figure>

5\.        Insert the crimped DC cable into the DC terminal firmly, then insert the waterproof rubber ring into the DC terminal and tighten the nut；

<figure><img src="/files/5HlKd0r0sMx12wiQrzbs" alt="" width="563"><figcaption></figcaption></figure>

6\.        Measure PV voltage of DC input with multimeter, verify DC input cable polarity；

<figure><img src="/files/MLm5O1Dd9wWGfhsFNwk0" alt="" width="430"><figcaption></figcaption></figure>

7\.        Connect the wired DC terminal to the inverter as shown in the figure , and a slight "click" is heard to prove the connection is correct；

<figure><img src="/files/mCwQHZ0ekl9ajkI4xwJ4" alt="" width="479"><figcaption></figcaption></figure>

<figure><img src="/files/WCMXxccJTYZNsnsDV4M7" alt="" width="563"><figcaption></figcaption></figure>

#### AC Side Wiring

<figure><img src="/files/S9HnWEdtoKrBf4izwzwW" alt="" width="563"><figcaption></figcaption></figure>

There are three sets of AC output terminals and the installation steps for both are the same . The maximum temperature for connecting AC and battery terminals is 85°C.

<figure><img src="/files/tA6okzYjkOPUqIsSv6mc" alt="" width="563"><figcaption></figcaption></figure>

<figure><img src="/files/cWg09c4t9AXyjHnC2mNX" alt="" width="563"><figcaption></figcaption></figure>

1\.        Bring the AC cables for the backup loads panel (backup) and the main service panel (grid) into the inverter wire box . The backup loads panel should not be    electrically connected to the main service panel.

2\.        Strip 13mm from the ends of each cable . Crimp the R-type connectors onto the ends .

3\.        Remove the terminal bolts , insert them into the connectors , then use a torque wrench to tighten the bolts down .

4\.        Please refer to the terminal labels to connect the AC wires to the correct terminals . Cable Gland are recommended torque for installation is 7-7 .5 N.m . In order to ensure waterproof effect , the operator regularly checks whether the installation is tight.

<figure><img src="/files/OPn6N4qm18C1iYL63Nh1" alt="" width="563"><figcaption></figcaption></figure>

Requirements for the inverter backup port and Gen port:

1\.        Resistive load & RCD load: single phase Resistive load cannot exceed    100% inverter rated single phase power, the RCD load cannot exceed 60% inverter rated power.

2\.        Motor load: customer should be careful about the impulse power when    start the load , ensure the impulse power cannot exceed the overload curve power and time restriction .

3\.        RLC load: total power of load cannot exceed inverter rated power, the   instantaneous peak current (peak impulse current) during load switching shall not exceed twice the rated current of the inverter, and the minimum  power factor shall not be lower than 0.8.

4\.        Mixed Load: Excluding the RLC load , the motor load and RCD load should be reduced proportionally.

5\.        Isolation transformer: If starting with a transformer, it is necessary to pay     attention to the inrush current not exceeding twice the rated current and the    inrush power not exceeding the overload curve limit requirements; otherwise , a soft start function needs to be added to the transformer.

#### Communication Wiring

Take out the Ethernet cable from the high-voltage box. Insert one end of the cable through the waterproof terminal into the “PCS” communication terminal of the high-voltage box, and connect the other end through the waterproof terminal of the inverter to the “EMS” terminal of the inverter.

<figure><img src="/files/ZlOlbVotiaNJMI90Pust" alt="" width="563"><figcaption></figcaption></figure>

<figure><img src="/files/FKkzR8LBiCzBlvruWG70" alt="" width="563"><figcaption></figcaption></figure>

Other communication cables (LAN, RRCR, 14A, RS485, and CAN) can be connected with reference to the wiring method above.

#### Meter CT Wiring

1\.        Connect the grid phases L1/L2/L3/N to terminals 1/4/7/10 of the meter respectively.

2\.        Pass grid phase L1 through the meter CT from the P1 side to the P2 side. Connect the CT secondary terminal S1 to meter terminal 31, and connect CT secondary terminal S2 to meter terminal 33.

3\.        Pass grid phase L2 through the meter CT from the P1 side to the P2 side. Connect the CT secondary terminal S1 to meter terminal 34, and connect CT secondary terminal S2 to meter terminal 36.

4\.        Pass grid phase L3 through the meter CT from the P1 side to the P2 side. Connect the CT secondary terminal S1 to meter terminal 37, and connect CT secondary terminal S2 to meter terminal 39.

5\.        According to the actual distance to the meter installation location, the customer shall prepare the meter communication cable. Connect one end of the Ethernet cable to the “Meter” port in the high-voltage box according to the procedure in Section 3.5.6. At the other end, connect the green/white wire of the Ethernet cable to communication terminal “24” of the meter, and connect the green wire to terminal “25”.

<figure><img src="/files/nUCImfY9q85d7jz36fbY" alt="" width="563"><figcaption></figcaption></figure>

6\.        If a PV meter is used, the two meters shall be connected in series, that is, terminal “19” of the PV meter shall be connected to terminal “19” of the grid meter, and terminal “21” of the PV meter shall be connected to terminal “21” of the grid meter.

<figure><img src="/files/9ftbTXsyTjimNEGuC06D" alt="" width="375"><figcaption></figcaption></figure>

#### Other Wiring

**AC Auxiliary Power Wiring**

<figure><img src="/files/7eTvxNL158ATVwO4RW1E" alt="" width="563"><figcaption></figcaption></figure>

When installing 5 to 9 batteries, use 4mm² power cables. When installing 10 to 18 batteries, use 6mm² power cables.

Wire harness requirements: 12AWG (4mm²) \~ 10AWG (6mm²), with insulation outer diameter of 3.8mm \~ 5.2mm.

**DIDO**

1\.        Press the handles on both sides of the DI/DO port of the high-voltage box, and remove the connector from the high-voltage box.

2\.        As shown in the figure, pull out the wiring terminal.

<figure><img src="/files/xUSt0CHmlAsp32cDEpM0" alt="" width="375"><figcaption></figcaption></figure>

3\.        Loosen the wiring terminal, remove the waterproof terminal, and pass the cable through the terminal.

4\.        Connect the cable harness to the terminal.

<figure><img src="/files/UKlkCcJ5y1BHkmYGaJjb" alt="" width="375"><figcaption></figcaption></figure>

5\.        Insert the wiring terminal back into the connector.

6\.        Tighten the waterproof terminal clockwise.

<figure><img src="/files/YkNL1LNOuuOszsvKMNqF" alt="" width="375"><figcaption></figcaption></figure>

7\.        Insert the connector back into the high-voltage box.

### Meter Settings

The default meter address is the utility grid meter address. If a PV inverter is added on the Grid side, an additional meter shall be installed, and its address shall be set to 121.\
The steps for setting the communication address of the meter are as follows:

<figure><img src="/files/m4E8l8cbsY8Z1pvJOKL2" alt="" width="563"><figcaption></figcaption></figure>

### 1.2 Parallel Connection Wiring

#### 1.2.1   Communication Wiring

1\.        The parallel connection harness accessory pack shall be ordered separately. One additional parallel connection harness pack is required for each unit in the parallel system.

2\.        Take out the Ethernet cable from the parallel connection harness accessory pack. Connect one end of the cable to the “Parallel” port of one high-voltage box, and connect the other end to the “Parallel” port of the high-voltage box of another system, and so on.

<figure><img src="/files/kK9WqvHuFmRAFovvTQ4e" alt=""><figcaption></figcaption></figure>

3\.        Take out the other Ethernet cable from the parallel connection harness accessory pack. Connect one end through the “COM” waterproof terminal at the bottom of one inverter to “P-A” or “P-B” of that inverter, and connect the other end to “P-A” or “P-B” of the inverter in another system, and so on.

<figure><img src="/files/2rRmCv585D2rvC7jNx5z" alt="" width="563"><figcaption></figcaption></figure>

4\.        Take out the terminal resistors from the parallel connection harness pack, and insert them respectively into the unused “Parallel” ports of the first high-voltage box and the last high-voltage box in the parallel system.

#### 1.2.2   Electrical Wiring

The parallel electrical wiring is as follows:

<figure><img src="/files/71yecXRlQYz37LM0QlEI" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/j2SQktMdZ3W9fmP9k1xk" alt=""><figcaption></figcaption></figure>

<p align="center"> </p>

<p align="center"> </p>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.alphaess.com/stax-m50-installation-manual/installation.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.