Rolls S48-100LFP ESS User manual

ROLLS S48-100LFP ESS
BATTERY OPERATING
MANUAL
Recommended safety, installation, operating,
and troubleshooting procedures for Rolls
S48-100LFP (Lithium Iron Phosphate) ESS
(Energy Storage Systems).

BACKUP
SYSTEMS
RENEWABLE
ENERGY

1
TABLE OF CONTENTS
02 Rolls S-Series 48V LFP ESS (Energy Storage Systems)
04 Version History/Changelog
04 Product Description Installation
05 Cable Connections, Terminal Torque, Single Battery Installation, Parallel Battery Installation
06 Without Combiner Box
07 With Combiner Box
09 Battery Operation, First Start, LED Indicator Instructions
11 LCD Screen, BMS Protection Summary
11 Battery Charging
12 Charging Guidelines
13 Charging Source: Lead-Acid Battery Charger
13 1-Stage Charging – CC (Constant Current)
14 2-Stage Charging – CC/CV
15 3-Stage Charging - Legacy Lead-Acid Systems, Inverter/Charger Hardware
16 Charging Temperature
17 Communication Interface, CAN Communication, RS-485 Communication
18 Parallel Communication, BMS Storage Function
19 Parallel Pack Selector Switch 4-Dip, Troubleshooting
20 Storage, Recycling, LFP Glossary
22 Appendix
24 Contacts

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ROLLS S48-100LFP ESS
Rolls S-Series 48-volt Lithium Iron Phosphate (LFP/LiFePO4) Energy Storage System
(ESS) batteries are designed for use in larger-scale, 48V (51.2V nominal) systems, for
grid-connected backup and off-grid purposes. Rolls S-Series 48V LFP ESS batteries are
designed to scale in parallel capacity only at this voltage level, with communication
between batteries and to externally connected equipment.
This manual provides detailed instructions for safe and proper installation, operation, and
care specifically of Rolls S-Series 48V LFP ESS batteries. Please read carefully to clearly
understand the operating instructions and any potential safety risks prior to installation.
Failure to install or use this battery as instructed may result in damage to the product that
may not be covered under the manufacturer warranty. See warranty terms & conditions for
full details.
NOTE: This manual offers installation, charging and troubleshooting guidance for Rolls
S-Series 48V LFP ESS battery only.
See Rolls S24-2800LFP & S48-6650LFP ESS Battery Operating Manual for usage instructions
specific to Rolls S24-2800LFP ESS and S48-6650LFP ESS (Energy Storage System) models.
See Rolls R-Series & S-Series Drop-in LFP Battery Operating Manual (Grey and Red plastic
cases, BCI sizes) manual for usage instructions specific to Rolls R-Series & S-Series drop-in
LFP models.
Para ver la versión en español, haga clic aquí.
O consulte nuestro sitio web.
This document is NOT APPLICABLE to the following models
S-Series 12V & 24V LFP R-Series 12V & 24V LFP 24V & 48V ESS LFP Models
(S48-6650LFP ESS &
S24-2800LFP ESS)
(R12-___LFP & R12-___LFP)(S12-___LFP & S24-___LFP)

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LFP Battery Lead-Acid Battery
Cell Voltage = 3.2V Cell Voltage = 2.0V
Battery Nominal Voltage
51.2V (16 cells)
Battery Nominal Voltage
48V (24 cells)
Nominal voltage of an LFP battery differs from equivalent lead-acid batteries.
WARNING: Explosion, Electrocution, Or Fire Hazard
• A battery can present a risk of electric shock, burns from high short circuit current, fire,
or explosion.
• Ensure cables are properly sized for the system current and cable runs are as short as
possible, reducing line inductance and voltage spikes, which can damage the BMS.
• Ensure adequate airflow around batteries and that they are clear of debris.
• Never smoke or allow a spark or flame near the batteries.
• Always use insulated tools.
• Avoid dropping tools onto batteries or other exposed electrical parts.
• Cold temperatures can be especially damaging to batteries after even a single low
temperature event.
• Never charge a Rolls S-Series 48V LFP ESS battery below 0°C (32°F).
• Never discharge a Rolls S-Series 48V LFP ESS battery below -20°C (-4°F).
• Never charge a battery with a deformed or bulging case.
• Do not expose a Rolls S-Series 48V LFP ESS batteries to heat more than 60°C (140°F)
during operation, and do not store for extended periods of time above 45°C (113°F). Do not
incinerate or expose to open flames.
• If a battery must be decommissioned/removed, always open the breaker first, then remove
the grounded terminal from the battery. Make sure all devices are disconnected.
• When installing, leave adequate clearance between batteries consistent with local code
requirements and or Rolls racking systems.
• When replacing batteries, use the same make, model & quantity of batteries.
• Do not mix old and new batteries.
• Avoid any fall or collision during the installation process.
• Do not dismantle or remove the battery components.
• Battery maintenance should be carried out by qualified personnel.

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Rev. Changelog Author/Editor Date
1.0 Release Version Jordan Torrealba 2023/08/15
VERSION HISTORY/CHANGELOG
PRODUCT DESCRIPTION
Rolls S-Series 48V LFP ESS batteries are 19” rack-mount and wall-mount compatible.
These batteries are intended for large-scale, higher capacity installations than our drop-in
replacement lines.
Cabinets installation instruction are available online at: Rolls S-Series LFP ESS Cabinet
Assembly Manual.
For Rolls S-Series 48V LFP ESS batteries with connectable PC software, the manual is
available online at: Rolls LFP Desktop Manual.
PANEL FEATURES
INSTALLATION
This section describes installation steps and considerations for your Rolls S48-100LFP ESS
product. The battery pack can be installed horizontally or vertically.
NOTE: Only trained electrical power system technicians should install the device. Before
installing or removing the battery, make sure that the system is disconnected from any
power source and that the battery device is turned off. Distribution cabling needs to be
handled carefully with reasonable protective measures to avoid being touched during the
maintenance and operation.
1. Positive Terminal (2*M6)
2. SOC LED
3. RUN Indication
4. Fault Indication
5. Parallel Address DIP
6. CAN bus Communication
7. RS-485 Communication
8. RESET Switch
9. LCD Display & Navigation
10. On/Off Breaker
11. Protection Breaker
12. Negative Terminal (2*M6)

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CABLE CONNECTION
All cable connections should be adequately sized, insulated, and undamaged. The cable
connectors should be clean and properly mated with the battery terminals to ensure a snug
connection. Terminal connections should be torqued to the recommended specification
below. Although Rolls S-Series LFP ESS batteries do not require maintenance, routine
inspection of cabling and terminal connections is recommended.
Amperage 25 30 40 55 75 95 130 150 170 195 260
Wire Gage 14 12 10 8 6 4 2 1 1/0 2/0 4/0
TERMINAL TORQUE
Rolls batteries using M6 fasteners should be torqued to 8-10Nm.
DO NOT OVERTORQUE: If a terminal is damaged, do not attempt to repair the terminal. Do
not use the battery if the recommended torque specification cannot be met.
SINGLE BATTERY INSTALLATION
Rolls S-Series ESS rack-mount batteries are compatible with standard 19” rack hardware.
For single battery installation, connect the positive and negative terminal of the battery
pack to the positive and negative terminal of the system bus with the appropriately sized
red and black cable, respectively. If you intend to use a combiner box, directly connect the
positive and negative terminals of the battery pack to the combiner box terminals.
PARALLEL BATTERY INSTALLATION
Rolls S-Series ESS rack-mount batteries are compatible with standard 19” rack hardware.
Rolls S-Series ESS batteries can be combined in parallel to increase system capacity and
power delivery. Rolls S-Series S48-100LFP ESS can support up to 16 battery packs in parallel
and is certified to UL 1973. Parallel batteries can be installed in the modular Rolls LFP ESS
cabinet, and expandable up to 32U per cabinet (i.e., Eight S48-100LFP ESS batteries can be
configured in a single rack).
The standard cabinet comes with a high current combiner box to connect the positive
and negative terminals from the battery to the outlet terminal at the top of the cabinet.
Refer to the connection diagram below and use appropriate cable sizing and length during
installation. The length, thickness, material, and resistance of all the cables connected in
parallel must be the same.
NOTE: Refer to the Communication Interface section for the parallel communication
cable connections.
NOTE: Undersized cables may lead to cable and/or battery damage, charging issues,
terminal heating, or fire.

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WARNING: Series connection of 48V S-Series LFP ESS batteries is not supported.
Connecting batteries in series will directly lead to BMS failure under numerous
conditions, risking cell health, user safety, and will void the product warranty.
WITHOUT COMBINER BOX

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WITH COMBINER BOX

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BATTERY OPERATION
FIRST START: When you have verified the connections, terminal torque, and external
connections are made, batteries can be activated. For batteries with a breaker, this can be
closed, which will electrically connect the terminals to the battery. The change in external
voltage or load application will wake the BMS.
If the BMS does not wake immediately, press the RESET button located beside the
display to wake the BMS from sleep mode.
LED INDICATOR INSTRUCTIONS
SOC
STATE CHARGE DISCHARGE
ALARM RUN
Rolls S-Series 48V LFP ESS batteries have four capacity indicator lights to display the
current state-of-charge estimate and charging status, one alarm light for error indication,
and one run light. This configuration is consistent across each LFP ESS model.
When the battery is charging, the RUN light will be on. When the battery is discharging, the
RUN light will be flashing.
Run Light ON Flashing
STATE CHARGE DISCHARGE
Capacity
Indicator
75-100%
50-75%
25-50%
0-25%