FOX ESS HV25 BMS Box Installation Guide

FOX ESS HV25 BMS Box

Tools Required

The following tools will be required to install the Mira-BMS and the battery.

Packing List

For Mira-HV25

Note : item E is provide separately, not including in battery package. Please contact your dealer if you do not have it.

For Mira-BMS

Note : item F is provide separately, not including in battery package. Please contact your dealer if you do not have it.

Terminals

For Mira-BOX :

For Mira-HV25 :

Installation Steps

Note : Batteries with different color SN label cannot be mixed in one system

1. Step 1
   Place the front bracket and back bracket as shown below.

2. Step 2
   Insert the battery module into the bracket from front horizontally, and tighten the four screws on the side.

3. Step 3
   Locate the brackets for the second battery on top of the first pair of the bracket and fasten the connecting button on the side.

4. Step 4
   Insert the battery module into the bracket from front horizontally, and tighten the four screws on the side

Note:
Max. 4 pieces battery per stack. Please make sure each system including 1 Mira-BMS.

Battery modules less than 4 pieces:

Battery modules more than 4 pieces:

Wiring Steps

Battery power cable:

1. Step 1 : Connect the power cable starting from the first battery module in series with other battery modules (Orange opposite, black negative). A ‘click’ sound indicates the connections are secured. The positive and negative connection of the battery cable is shown in below.
2. Step 2 : Measure voltage value: After all battery modules are connected in series, use a multimeter to measure the DC voltage on DC terminal. The total voltage should be N *52+10V (N is the total number of battery module). Please refer to the picture below for voltage test.

Communication cable connection

1. Step 1 : Take the main positive cable (two orange plugs), the main negative line (two black plugs) to connect the Mira-BMS.
2. Step 2 : Then connect the MODULE on the Mira-BMS to the CAN-1 of the first battery module, connect the CAN-2 of the previous battery module to CAN-1 of the next battery module, leave the last module’ s CAN-2 vacant. Wiring shall be connected in the sequence as shown in below.

Grounding cable:
Connect the grounding cable to ensure that all batteries are grounded. Wiring shall be connected in the sequence as shown in below.

System Start Up

Mira-BMS operation:

1. Normal mode : Turn on DC switch first, then press ‘POWER’ button.
2. Black start : (No grid connected) press the ‘B-start’ switch, turn on DC switch, and then press the ‘POWER’ switch.

Startup steps:
After powering on, all the green lights flash once, and then the running water lights flash once. The light on the Mira-HV25 comes on after a delay, not at the same time as the light on the BMS

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