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NB Module
Installation and Operation Manual
Batteries, battery posts, terminals and related accessories
California
contain lead and lead compounds, and other chemicals known
Proposition 65
to the state of California to cause cancer and birth defects or
Warning:
other reproductive harm. Wash hands after handling.

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Do you have a question about the Unigy II and is the answer not in the manual?

Questions and answers

James Shirey
March 7, 2025

I have 2- Unigy 2 battery setups stacked in a 24V system I want to convert it to 48 it looks like I **** short 6 small bars to do this where can I get them? or can the batteries be rearranged to work with what I have

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1 comments:
Mr. Anderson
May 14, 2025

To convert a Deka Unigy II battery setup from 24V to 48V, you need to:

1. Determine the number of cells required: Each AGM cell typically provides 2V. A 24V system uses 12 cells (12 × 2V), while a 48V system uses 24 cells (24 × 2V). You will need to double the number of cells in series to reach 48V.

2. Order the correct configuration: When purchasing or modifying the battery bank, specify that you need a 48V system. The supplier can build the bank with the correct number of cells and amp-hour capacity.

3. Use included interconnects: The system includes battery interconnect cables and terminal bars, so no need to buy separate interconnects.

4. Ensure correct installation: Follow proper installation procedures, including correct polarity, torque values, and grounding using star washers with teeth facing the module.

5. Adjust charger settings: Ensure the charger is set to the appropriate float voltage for 48V (2.25V per cell) and performs optional equalizing charges only if compatible with connected equipment.

You can find the necessary parts and configuration through the supplier when ordering the battery bank, as they build it to your specified voltage and capacity.

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Summary of Contents for Deka Unigy II

  • Page 1 ® NB Module Installation and Operation Manual Batteries, battery posts, terminals and related accessories California contain lead and lead compounds, and other chemicals known Proposition 65 to the state of California to cause cancer and birth defects or Warning: other reproductive harm. Wash hands after handling.
  • Page 2: Table Of Contents

    TABLE OF CONTENTS Safety Precautions Connector Assembly ........13 Protective Equipment..........3 Final Assembly..........13 Procedures ............3 Safety Shield Assembly ........14 Receiving & Storage System Operations Receiving Inspection ..........3 Charge Voltage ..........15 Unpacking ............3 Temperature Compensation ......15 System Shipment..........3 Cell Voltage ............15 Storage ..............4 Rectifier Ripple Voltage ........15 Record Keeping ..........15 Installation...
  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS 7. Never remove or tamper with the pressure relief valves unless for cell replacement. Warranty void if vent valve is removed. Although all valve-regulated batteries have the electrolyte immobilized within the cell, the electrical hazard associated 8. Inspect all flooring and lifting equipment with batteries still exists.
  • Page 4: Storage

    Cell Shipment RECEIVING & STORAGE CONT. Module Shipment Each cell will be in an individual sleeve. There will be a maximum of 6 cells per pallet. All battery accessories (connectors, terminal plates, hardware) will be included with a module pallet. The pallet will be indicat- ed with an “Accessory”...
  • Page 5: Installation

    INSTALLATION SYSTEM INSTALLATIONS General All parts should be verified against packaging list. Module Installation Report any missing parts. Caution should be taken when installing batteries to insure no damage occurs. The battery cabinet, tray, rack, etc. shall be inspected for sharp edges that could cause damage to the Assemble system per the following details.
  • Page 6 SYSTEM INSTALLATIONS 7. Base and module layout should be compared to system CONT. layout diagram. All ½-13 x 1.75" hardware (2 per corner) are to be installed on the inside of the module for module 5. Remove hardware holding modules together (4 bolt to base connection.
  • Page 7 8. Bolt assemblies (two per corner) are required on the 10. The system layout diagram should be consulted to outside of the module to complete the base to module determine module configuration. System design limits connection. All ½-13 x 1.75" hardware should be checked modules to be stacked no higher than 4 modules (8 cells for proper torque before proceeding.
  • Page 8: Cell Installation

    SYSTEM INSTALLATIONS Star washers are to be installed with teeth towards module to CONT. ensure proper grounding. 11. Cell / Sleeve Installation — Install cells into modules. Note: Top Plate hardware contains two different types of star Cells are shipped separate from modules. Cell polarity washers.
  • Page 9: Electrical Connection

    Bottom Retainer Bar Bottom Shield Bracket Installation Safety Shield Bracket Installation 2. Module layout should be compared to system layout diagram and all hardware should be checked for proper 1. Safety Shield Brackets are to be installed at the outside torque before proceeding.
  • Page 10 TERMINAL ASSEMBLY 5. Install terminal plate to battery posts using 1/4-20 x 1.00" CONT. hardware. 2. Remove module bolts directly behind location of terminal plate. 3. Replace flat washer with cap washer. Re-install 3/8-16 x 1.25" into module with safety shield bracket (if required). Torque hardware before proceeding.
  • Page 11: Side Termination

    Side Termination 8. Lug Hole Layout — Top terminal plate designed to use up to 0.50" dia. bolt and a maximum 1.75" centers and 1.188" Consult system layout diagram for side termination location. min., 2 hole lug. 1. Remove safety shield bracket if required. .56 DIA.
  • Page 12 TERMINAL ASSEMBLY 7. Install Side Terminal Shield to Side Terminal Plate using CONT. ¼-20 screws. 4. Connect side terminal plate to side terminal plate connec- Tighten but do not torque hardware. tors. Side terminal bracket and side terminal connectors may have to be adjusted to insure plate and connectors are flush.
  • Page 13: Connector Assembly

    CONNECTOR ASSEMBLY 5. NB battery systems are supplied with multiple connectors to be used per battery post. A 2CU connector package will require 2 connectors per connection (1 per side), see 1. The contact surfaces of each individual post on every cell example below.
  • Page 14: Safety Shield Assembly

    CONNECTOR ASSEMBLY CONT. 4. Battery performance is based on the output at the battery terminals. Therefore, the shortest electrical connection between the battery system and the operating equipment results in maximum total system performance. Select cable size based on current carrying capability and voltage drop.
  • Page 15: System Operations

    Equalizing For top terminal assembly, align protective cover in front of top terminal plates. Mark area of protective shield that is Upon installation of the battery, an optional boost charge of required to be removed in order to fit between the terminals. 2.40 vpc ±...
  • Page 16: Maintenance

    RECORD KEEPING Do not discharge the batteries beyond the specified final volt- CONT. age. When discharging at higher rates, extra connectors may need to be added to prevent excessive voltage drop and / or excessive temperature rise. Consult “Connector Packages” chart (pg.
  • Page 17: Cell Weight & Volume

    9. Pull cell from module onto lifting device. Care should be taken so lifting device does not come in contact with cell posts. 10. Replacement cell may have built up pressure while on open circuit. Refer to step 5 for relieving the internal cell pressure.
  • Page 19: Appendix A

    APPENDIX A BASE ANCHOR HOLE PATTERN Module Type 2 x 2 17.55 29.55 3 x 2 30.33 42.83...
  • Page 20: Appendix B

    APPENDIX B VOLTAGE COMPENSATION CHART ºC Float ºF >35 2.230 >95 2.232 93.2 2.234 91.4 2.236 89.6 2.238 87.8 2.240 86.0 2.242 84.2 2.244 82.4 2.246 80.6 2.248 78.8 2.250 77.0 2.252 75.2 2.254 73.4 2.256 71.6 2.258 69.8 2.260 68.0 2.262 66.2...

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