INSTALLATION MANUAL

Introduction

This manual is intended to provide assistance to an installer for the installation and commissioning of the range of Solar MD Lithium Ion phosphate (LiFePO4) energy storage solutions.

Product Description

The SS4143-01 battery solution is available in one standard size and can be paralleled to meet most residential applications. The rated voltage is 51.2V nominal (to suit 48V systems). Larger systems are provided by Solar MD based on specific project requirements.

WARNING: Read the entire document before installing or using the Solar MD battery. Failure to comply with the instructions or warnings in this document could result in electrical shock or serious injury that can result in death or damage to the product that can render the SS4143 Solar MD battery inoperable.

Product Specifications

All SS4143-01 specifications & descriptions contained in this document are verified to be accurate at the time of printing. Solar MD reserves the right to make any product revisions & improvements at any time.

Errors or Inaccuracies

To communicate any inaccuracies, omissions or to provide general feedback regarding this manual, send an email to info@solarmd.co.za

Copyrights

All information in this document is subject to the copyright of Solar MD (Pty) Ltd. Additional information is available upon request.

Safety Information

This manual contains important instructions and warnings that must be followed when using SS4143-01.

Read all instructions before installing and using the SS4143-01.

Warnings

• Use SS4143-01 only as instructed.
• For communication and other information please read the BMS manual.
• Do not attempt to disassemble, repair, modify, or tamper with this battery unit.
• Do not insert foreign objects into any part of the battery unit.
• Avoid exposure to any moisture.
• Do not expose to extreme temperatures.
• Do not drill any holes into the box.
• Use only an approved Solar MD installer to install this product.

Failure to comply will void the warranty

Cautions

Specification

Solar MD 14.3kWh SS4143-01 specification

Mechanical installation

The middle triangle just serves as spacing. No fastening of this piece to the wall is necessary.

Holes 1 & 5 are the most important. Should at least have these 4 secured. Holes 3 & 6 can be the next to be used.

Please use the correct mounting screws for the specific wall surface. Make use of M8 screws/bolts.

Diagram Description: Two diagrams showing mounting hole locations and dimensions for the battery unit. The top diagram shows a front view with dimensions and hole numbers. The bottom diagram shows a side view with dimensions and hole numbers.

Installing top cover plate

Move lid maximum 36mm up, then move lid towards yourself. Be mindful of the button that's still connected.

Diagram Description: An isometric view of the battery unit with the top cover being lifted and pulled forward, indicating the movement range.

Battery spacing

Installation stacked should be spaced minimum 50mm vertically and minimum 15mm horizontally.

Diagram Description: Two diagrams showing battery spacing. The top diagram shows a single battery. The bottom diagram shows two batteries stacked vertically with 50mm spacing and two batteries placed side-by-side horizontally with 15mm spacing.

Battery feet installation

The Battery will come with the feet covers assembled. Remove as seen in detail A and then fit feet plates as seen in detail B. Turn in 4 feet that's supplied with battery.

Diagram Description: Two detailed views (Detail A and Detail B) showing the process of removing the battery feet covers and attaching the feet plates.

Electrical installation

Step 1. Before connecting anything be sure that the battery ON/OFF switch is at OFF position. (figure 4)

Diagram Description: A detailed image of the BMS board with various components labeled, including:

• Ext Temperature Sensor Input
• Cell Harness
• Main Switch ON/OFF
• Protection Relay
• Multifunction Push Button
• Status Indication LED
• Current Measuring
• Hardware Version
• Product Code
• Serial Number
• Capacity Indication LED
• 120 Ω Termination
• Service Port
• CANBUS 1 Communication Port 1
• CANBUS 2/RS485 Communication Port 2
• Isolated Outputs

Step 2. Connect the negative cable to the battery negative busbar and positive cable to the battery positive busbar as shown in figure 5.

Diagram Description: An image showing the battery terminals with positive and negative connection points labeled, along with 200A fuses.

Caution! Connecting Inverters/chargers/UPS to the battery unit while it is ON can cause big sparks due to capacitors inside the connected device. This can be harmful to people.

Caution! Connecting the main battery terminal must be with the correct size cable based on the rated current of the battery and the charger/inverter incase it's lower.

Switching the Battery ON

Step 1. Make sure all DC cables are tightened according to specifications.

Step 2. If the battery operates in parallel with other energy sources, make sure that the difference between battery voltage and DC bus is not more than 2.5V. If greater than 2.5V please charge or discharge the other source accordingly until the voltage difference is in a safe range under 2.5V.

Caution! A hot connection with difference in voltage can cause very high equalization current which can burn the fuses of the battery!

Caution! Measure the voltage of the battery before connecting the DC cables.

Step 3. Turn the BMS board ON/OFF switch to the ON position (figure 4).

Step 4. Connect Multipurpose button if not connected to the BMS board connector (figure 4).

Step 5. Hold the multi purpose button until the light comes on.

Warning! If the battery does not switch the main protection contactor ON in 7 sec, please check the BMS board indication LED for faults. See section BMS Error and Warnings.

Multicolor multipurpose button

Diagram Description: An image of the battery unit with the multicolor multipurpose button highlighted, and a separate image of the button itself.

Button functions

The new Solar MD Multipurpose button has an extended functionality in combination with the BMS-EX. The Multipurpose Button can be used to directly execute 6 predefined functions and a shutdown instruction. In combination with the 6 Indication LEDs on BMS-EX, the user can choose between each function by holding the button until the LED count matches the number of the function. By releasing the button while moving through the functions, the LEDs will start blinking and wait for the user to press the button again within 3 seconds.

The predefined functions are:

1. Reserved
2. Change indication LED function between: Show Capacity, Show Current, and Off
3. Reserved
4. Wake up if Sleep mode is active
5. Activate Override Off state for 60sec
6. Activate Override On state for 60sec

If the button is held continuously after function 6, shutdown mode is activated and the battery will send a signal to switch off in 4sec. Further holding the button causes the BMS to delay complete shutdown for a maximum of 3 minutes. This operation is used when the technician wants to continue to read or write parameters after shutdown.

Button indication

**Access to all features in future development

The Multipurpose button advanced indication functionality, allows the user to choose between 5 different states. Mixed combinations are also allowed when a combination of multiple batteries with BMS-EX are used. The User can change the prefered stage by logging into their mypower24 Energy Portal and go to the Battery Settings.

Illumination off

**For future development

When this state has been selected, the button serves as an on/off switch without illumination (fixed colour).

Color based on capacity

When this state has been selected, the button shows static illumination in a color based on the state of charge. From RED at 0% SoC (State of Charge) to GREEN at 100% state of charge.

Color based on capacity with current direction based on shading.

**For future development

When this state has been selected, the button shows flashing illumination in a color based on the state of charge and flashing code based on the electrical current direction (charge / discharge). From RED at 0% SoC (State of Charge) to GREEN at 100% state of charge. The flashing code for charge goes through illumination interruption for 1 interval and slow illumination into the color based on the SoC for 5 intervals. The flashing code for discharge represents the opposite from charge - study color for 1 interval and slow loss of color following illumination interruption. Solar MD users refer for both as charging / discharging waves.

Fixed color with current direction based in shading

**For future development

When this state has been selected, the button shows illumination in a color based on the user choice and flashing code based on the electrical current direction (charge / discharge). The flashing code for charge goes through illumination interruption for 1 interval and slow illumination for 5 intervals. The flashing code for discharge represents the opposite from charge - study color for 1 interval and slow loss of color following illumination interruption. Solar MD users refer for both as charging / discharging waves.

BMS Warnings and Errors

Method of displaying general warnings and errors:

Diagram Description: An image of the BMS board highlighting the Status LEDs and Indication LEDs.

The Status LEDs determine what the indication LEDs will show.

1. If the Status LED is Green the indication LEDs will show:
   a) Battery capacity
   b) Current flow and direction
   c) Off
   The functionality of the indication LEDs are configurable, see more on this: multifunction push button.
2. If the Warning LED is Orange
   a) The indication LEDs will show the warning number in binary, which corresponds to that tabulated below in the warning register.
3. If the Error LED is Red
   a) The indication LEDs will show the error number in binary, which corresponds to that tabulated below in the error register.

Warning Register

Error Register

CANBUS connection.

Bms EX used CAN 2.0B @ 500000 kb. Connecting other device operating at different speed rate is not allowed. For connection please use twisted pair wires in a shielded cable to minimize RF emissions. RJ45 connections can be used for daisy chaining BMS EX together using a straight Ethernet cable. The output of the Bms EX CAN transceiver is galvanically isolated.

Diagram Description: A diagram illustrating the CANBUS connection between BMS EX units and other loggers, showing the wiring for CAN HIGH, CAN LOW, and CAN GND.

Diagram Description: A detailed image of the BMS board showing the CANBUS ports, termination resistor, and warning LED location.

CANBUS warnings

The Orange LED (WARN) is used to display warning for canbus only. Reading this warning is possible with pulse counting.

• CANBUS line open or no termination resistor set. [1]
  CAN BUS line in initialization stage. Canbus init occurs when the line is opened and then established. Minimum period for initialization is 30sec. In this period all nodes are scanned in the network and scanned for ID and serial number collisions. [2]
• Duplicate CAN ID detected with no “auto ID” set. [3]
• Duplicate Serial number detected. [4]
• CANBUS Internal fault. [5]

Troubleshooting Warnings / Errors

Maximum charging / discharging voltages for non supported devices.

• Bulk charge (stop charging): 54.6V
• Float charge (if applicable): 53.8V
• Low battery discharge: 48V

Check that the Equalisation function are disalled, then verify if there is a voltage difference on the inverter display and the battery terminals @0.3C discharge / charge current. If so adjust the values above.

Please check if your inverter charger has been approved by Solar MD and it is CAN compatible.

For the latest Solar MD installation documents go to: www.solarmd.com

To secure the full 12-year product warranty for the end user, be sure to register your battery online – login.mypower24.co.za.