Freedom Won eTower User manual

Installation Manual
eTower
Lithium Iron Phosphate Battery Modules
Manufactured By Freedom Won (Pty) Ltd
Kimbult Industrial Park, Unit C3 & C4
9 Zeiss Road
Laser Park, Honeydew
2040
South Africa
www.freedomwon.co.za
Technical and Installation Assistance – Contact:
Please contact your Freedom Won Distributor or Reseller Installer for technical and installation
support. A directory of Distributors and Reseller Installers is available at www.freedomwon.co.za.
For advanced support please contact suppo[email protected]o.za.
Update Record:
Revision
Number
Update Summary
Updated By
Date of Issue
0
First Release
Antony English
01 October 2021

eTower Installation Manual Revision 0
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Thank you for choosing eTower for your energy storage needs. Freedom Won is a leading
high-quality brand and we pride ourselves in customer satisfaction and great service. We
hope that you find this manual helpful and complete, but please do reach out to us if you
have any additional requirements or queries.
1. Introduction
This manual is intended to assist an installer with the installation and commissioning of the
eTower lithium iron phosphate (LiFePO4) energy storage modules. This document is not
intended to provide detailed information of the inner workings of eTower that is not
relevant to a person that is performing the installation and final commissioning.
Supplementary information relating to programming of the built-in battery management
system for non-standard inverter interfaces is available to approved integrators directly
from Freedom Won.
This manual does not attempt to cover all the details pertaining to the setup of third-party
equipment in relation to the interface and necessary functionality to work with the eTower.
Freedom Won however is available at the contact details on page one to provide direct
support that specifically relates to the battery interfacing with supported third-party
inverter brands.
2. Product Description
The eTower range presently includes only the e5000 module, which has been designed
specifically for enabling small economical storage solutions that can be upgraded
conveniently and cost effectively over time.
The product includes all accessories required to enable fast and convenient installation.
Although rack mounting is possible, the modules are primarily designed for easy stacking
into a tower through the inclusion of a plastic moulded pedestal that is placed underneath
each module in the tower. Further convenience is offered through the inclusion of the
required communication and power cables along with module connecting busbars.
The eTower is designed primarily for systems that need to start with 5kWh initially with a
view to growing the storage capacity over time in 5kWh increments up to 20kWh.
For designs that require 10kWh or more initially the Freedom LiTE Home and Business range
may be a preferred solution depending on customer preferences and needs.
Freedom Won offers the following ranges in the LiFePO4 technology:
1. Lite 12V
2. eTower
3. Lite Home and Business
4. Lite HV Home and Business
5. Lite Marine
6. Lite Mobility (golf carts, forklifts etc)
7. Lite Commercial (including Lite Commercial 52V, HV, and HV+)

eTower Installation Manual Revision 0
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8. Lite Industrial
This manual covers only the eTower. Please refer to the manuals specific to the other ranges
for help with those models.
The eTower voltage is 52V nominal (to suit so called “48V” systems). This higher nominal
voltage of 52V (compared to 48V nominal batteries) offers superior performance and
efficiency owing to lower DC currents in the battery and in the inverter.
2.1 External Features Summary
An image with numbered labels is provided in Figure 2.1 and described below. Additional
detail is provided in Section 2.2.
Tabulation Descriptions from Figure 2.1:
1. Fixing threads for 19” rack mount brackets if required
2. Carrying handles
3. State of Charge (SoC) capacity indication LED’s
4. Run indication
5. Warning LED
6. Address dip switches
7. RS232 Interface RJ11 plug
8. RS485 dual interface inter module communication bus RJ45plugs
9. Digital Output Dry Contacts (DCT)
10. Reset Button
11. Positive Terminal
12. Negative Terminal
13. Circuit Breaker
14. Inverter RS485 Interface RJ45 plug
15. Inverter CAN Bus Interface RJ45 plug
16. On/Off indication LED
17. Plastic Pedestal
18. CAN Bus Communication Cable
19. DC power cables
20. Earthing Point

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Figure 2.1 Labelled Image of the eTower with four modules stacked together (Labelling
corresponds with the text)
2.2 External Features Detailed Information
Below provides more detailed information pertaining to the external features listed in 2.1
above.
2.2.1 19” Rack Bracket Fixing Points
The eTower modules can be installed into a standard 19” rack. There are three fixing
threads on each side of the module near the front, as indicated, that match the 19” rack
mount brackets available from Freedom Won on request. The primary installation
arrangement is intended to be stacking the modules into a tower using the inter-module
pedestal, but for applications requiring 19” rack mounting the required brackets can be
installed in minutes. Please specify how many of these brackets are required when ordering
eTower.
2.2.2 Carrying handles
Two carrying handles are fitted to the front face of each module to ensure easy and safe
handling and lifting onto the pedestal. Freedom Won recommends two people for stacking
the eTower modules.

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2.2.3 State of Charge Indication
The State of Charge (SoC) of the battery is indicated by six green LED’s as a percentage of the
module’s maximum energy storage value in kWh. These LED’s are numbered one to six where
number one is the LED positioned furthest to the right and number six is the furthest to the left. The
LED indicating the present top SoC range flashes when the battery is receiving charge current. The
SoC level allocation to each LED illumination combination is provided in table 2.2 below.
Table 2.2 State of Charge (SoC) Indicator Capacity Matrix under Discharging/Inactive and Charging
states
Capacity
Status
LED Capacity Indicator
Discharging or Inactive (no current flow)
Charging
●
●
●
●
●
●
●
●
●
●
●
●
LED1
LED2
LED3
LED4
LED5
LED6
LED1
LED2
LED3
LED4
LED5
LED6
0~16.
6%
Light
on
Light
off
Light
off
Light
off
Light
off
Light
off Flash
Light
off
Light
off
Light
off
Light
off
Light
off
16.6~
33.2%
Light
on
Light
on
Light
off
Light
off
Light
off
Light
off
Light
on Flash
Light
off
Light
off
Light
off
Light
off
33.2~
49.8%
Light
on
Light
on
Light
on
Light
off
Light
off
Light
off
Light
on
Light
on Flash
Light
off
Light
off
Light
off
49.8~
66.4%
Light
on
Light
on
Light
on
Light
on
Light
off
Light
off
Light
on
Light
on
Light
on Flash
Light
off
Light
off
66.4~
83.0%
Light
on
Light
on
Light
on
Light
on
Light
on
Light
off
Light
on
Light
on
Light
on
Light
on Flash
Light
off
83.0~
100%
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on
Light
on Flash
2.2.4 Run Indication LED
The green “run” LED is illuminated whenever the battery is in a running or ready state, i.e. when the
BMS is on and there are no faults.
2.2.5 Warning LED
The red “Warning” LED illuminates if there is an active alarm or fault. The LED is otherwise
not illuminated. If this LED comes on there is likely a cell over voltage fault if the battery is at
100% SoC at the time. If the battery is at a low SoC the warning will most likely relate to a
low SoC alarm (SoC below 10%) or a low cell voltage alarm, which would normally only occur
below 10% SoC anyway.
2.2.6 Address Dip Switches Block
The block with four binary dip switches must be set to a specific configuration that allocates
the address of the eTower module. Each module must have its own address beginning with