Rolls Batteries User Manual
BATTERY USER
MANUAL
Recommended installation, charging and maintenance
procedures for Rolls deep cycle Flooded, VRLA AGM
& OPzV GEL batteries.
FLOODED
AGM
GEL
RENEWABLE
ENERGY
MARINE
MOTIVE
POWER
TABLE OF CONTENTS
02 Equipment & Safe Handling Procedure, Inspection
03 Quick Check List, Disposal Procedure
04 Installation, Battery Orientation
04 Cable Sizing
05 Terminals & Connection Connections
06 Parallel & Series Connections
09 Inspection & Initial Charge of Flooded Lead-Acid Batteries
10 Rolls Flooded Lead-Acid Battery Charging
10 Bulk Charge, Absorption Charge
11 Absorption Charge Time - Flooded
11 Float Charge, End Amp or Return Amps
12 Low Voltage Disconnect
13 Rolls Flooded Battery Charge Voltage Parameters
14 Temperature Compensation & Sensor Installation
15 Flooded Battery Capacity & Temperature
16 Specific Gravity
17 Battery Maintenance & Storage
17 Electrolyte - Adding Distilled Water
18 Maintenance Schedule, Storage
19 Cleaning Vent Caps
20 Equalization, Corrective Equalization
22 Preventative Equalization & Frequency
24 Rolls VRLA AGM Battery Charging Instructions
25 VRLA AGM Absorption Charge Time
25 Rolls VRLA AGM Battery Charge Voltage Parameters
26 VRLA AGM Battery Capacity & Temperature
28 Rolls OPzV GEL Battery Installation & Charging
28 Rolls OPzV GEL Battery Charge Voltage Parameters
29 OPzV GEL Absorption Charge Time
30 OPzV GEL Battery Capacity & Temperature
32 Renewable Energy Applications - Off-grid & Grid-tied
38 Warranty
40 Lead-Acid Battery Glossary
42 Troubleshooting & Frequently Asked Questions
47 Contacts
1
Rolls Battery has been manufacturing deep cycle lead-acid batteries since 1935.
Experience and commitment to quality has helped us achieve an unmatched
reputation in the industry. Our goal is to provide our customers with a premium
product providing dependable performance and long-lasting cycle life. This manual
provides the recommended setup, charging, Equalization and preventive maintenance
procedures necessary to maximize the life of your Rolls batteries. If you have batteryrelated questions beyond the contents of this manual, we encourage you to visit our
online Technical Support Desk (support.rollsbattery.com) for additional information
or file a support ticket and our Technical Support team will be happy to assist you.
EQUIPMENT & SAFE HANDLING PROCEDURE
• Goggles, rubber gloves & rubber boots
• Distilled water
• Baking soda, soda ash
To prevent injury, always wear acid-resistant clothing, PVC gloves, goggles and
rubber boots. Flooded batteries must be maintained in an upright position at all times.
Always have plenty of water and baking soda on hand in the event of an acid spill
during transport.
• hydrometer, refractometer
• voltmeter, ammeter
• battery charger
INSPECTION
When receiving shipment of your batteries, it is important to thoroughly inspect each
pallet, battery and packaging. Before signing acceptance of the shipment, remove the
shrink-wrap from the pallet and inspect each battery for damage (i.e. cracks, dents,
punctures, deformations, acid leaks or other visible abnormalities).
Do not accept shipment if the batteries appear to have been damaged in any way.
Confirm that connection terminals are secure and clean. If the battery is dirty, or if
any minor amount of acid has spilled onto the case due to loose bayonets, refer to the
cleaning instructions in this manual to properly neutralize and clean as necessary. Wet
pallets or signs of acid leak on or around the batteries could indicate shipping damage
or improperly sealed battery casing. Perform a voltage check to confirm the battery
polarity and marking of the terminals are accurate.
In the event of a suspected leak or damage, do not accept the shipment.
Contact your battery retailer or Rolls Battery to determine whether the batter(ies)
require replacement.
Battery shipments which are known to be damaged, but accepted, will not
be replaced under the terms of Rolls Battery manufacturer warranty.
2
QUICK CHECK LIST
SHIPPING/RECEIVING (MUST INSPECT PRIOR TO DRIVER RELEASE!)
• All parts are included
• No acid spill
• No visual damage to the batteries
• Verify electrolyte levels
INSTALLATION
• Protective equipment should be worn
• All electrical components should be turned off
• Acid spill cleanup material should be readily available
INITIAL CHARGE
• Verify electrolyte levels (add distilled water as necessary)
• Measure specific gravity
• Set up battery charge voltage/current limits
GENERAL
• Safety first!
DISPOSAL PROCEDURE
Batteries must NEVER be disposed of in household waste. To reduce environmental
impact, bring your spent lead-acid batteries to a certified recycling depot. Lead-acid
batteries are 97% recyclable and are the most recycled consumer product in the world.
Closed-loop manufacturing and recycling programs allows nearly all of the components
to be recycled or re-purposed. A credit by weight for lead may be offered by recycling
depots or facilities for spent batteries.
When processed safely, recycling batteries reduces the release of lead to the
environment and conserves natural resources. Recycled lead production takes only
35-40% of the energy necessary to produce primary lead from ore. Lead may
be recovered and re-purposed multiple times.
For more information on lead-acid battery recycling, visit https://batterycouncil.org
3
INSTALLATION
Rolls deep cycle batteries are manufactured for use in a variety of applications. In all
cases, it is important that the battery is installed securely, free of contaminants and
that all connections are in good contact with the terminals.
For all Rolls models it is recommended that the batteries are separated 2.5cm-7.5cm
(1"-3”) inches apart to allow proper airflow, cooling and ease of maintenance. Flooded
batteries should be installed in a temperature-controlled room or enclosure with
adequate battery spacing to allow cooling and/or insulating to prevent freezing in
very cold temperatures. Excessive heat will reduce cycle life due to cell degradation.
Batteries should never be installed in a completely sealed enclosure. Enclosures
for Valve Regulated batteries (VRLA such as sealed AGM & GEL models, should, at
minimum, be passively ventilated. Enclosures for Flooded models should be actively
ventilated with both positive and negative airflow installed to remove and replace any
hydrogen gas generated during charging (produced as cell voltage reaches 2.25 VPC or
above. Every effort should be made to avoid hydrogen accumulation as concentrations
in excess of 2-4% may ignite with electrical spark and are explosive.
The outer container of Rolls Series 5000 models is molded with handles to safely lift
and transport the battery. This also provides structural support to maintain cell shape
and offers an added layer of protection. Rolls individual 2V industrial cells are typically
housed in steel or plastic trays. These cells must be properly supported on each side
to protect against puncture, prevent bulging and should not be lifted by the terminals
as this may damage the posts or compromise the cells internally. When moving,
support straps should be used to safely and securely lift the cell from the bottom.
Dual-container models are better-suited and strongly recommended over industrial
cells for use in Renewable Energy and Marine applications as the stand-alone case
design allows easier transport and the ability to install the batteries with adequate
spacing for airflow. Series 5000 dual-container models are backed by a 5-year
(60 month) full replacement warranty, offering an additional 2 years of coverage over
the equivalent 2V industrial cell.
BATTERY ORIENTATION
Flooded lead-acid batteries must be kept in an upright position at all times as electrolyte
may spill if tilted more than 20 degrees. Rolls VRLA AGM batteries should be installed
upright for best performance and may not be mounted upside down or horizontally on the
end (shortest side) of the case. Models installed horizontally should not rest on the cover or
case/cover seam and must be supported fully on the long side of the case.
Rolls OPzV GEL models must be installed upright unless otherwise specified. Special order
models compatible with horizontal installation, as well as racking systems, are available upon
request. Models installed horizontally may not be mounted on the end (shortest side), should
not rest on the cover or case/cover seam, and must be supported fully on the long side of the
case. Use caution not to cover or apply pressure to valves located on the top of the batteries
when using strapping to install or secure cells as damage may occur.
4
CABLE SIZING
Cabling should be proportionate to the amperage of your system. The following table
notes the maximum current carrying capacity based on cable gauge. Battery cables
should be selected allowing a maximum voltage drop of 2% or less across the entire
length of the cable. Interconnection cables (battery to battery) should also be sized
at the same gauge and of equal length between connections. When choosing
interconnect cables or custom bus bars, size to allow adequate spacing between
batteries for airflow as outlined above.
TABLE 1: Wire gauge sizing by amperage
TERMINALS & CABLE CONNECTIONS
All cable connections should be adequately sized, insulated and free of damage. The
cable connectors should be clean and properly mated with the battery terminals to ensure
a snug connection.
Electrolyte spills and corrosion buildup will damage cable connectors and terminals. It is
recommended that terminal connections are disconnected, cleaned and re-torqued
periodically as part of the regular maintenance routine. This also applies to connections
using bus bars. Check and recalibrate the torque wrench for accuracy before use.
Visual inspections may not always detect poor connections. The use of an Infrared (IR
temperature) sensor may assist in identifying poor connections when testing under load
or during charge. Connections which have overheated and/or developed problems will
often be welded to the terminal. Loose connections may result in ignition of hydrogen gas
during charging or cause a short, melting the terminals.
Loose or overtightened connections may also cause high resistance. The result is an
unwanted voltage drop as well as excessive terminal heating which causes the terminal
to melt or even catch fire. To limit the possibility of damage or fire, use a torque wrench to
properly adjust terminal connections during your regular maintenance schedule.
As batteries are cycled and heat up during charge, under-torqued connections may
become loose over time as the terminals heat & cool, causing possible arching and a
risk of spark. Over-torqued connections may indent, crack or bend the terminal and/or
washers or terminal connectors.
Damage to terminals and/or batteries caused by under/over-torque is often
unrepairable and is not covered under manufacturer warranty. Follow the
recommended torque settings for each terminal type. Battery distributors or dealers
may offer replacement or repair, where possible, at the customer's expense.
5
TERMINAL TORQUE SETTINGS
Refer to the chart below for the recommended torque setting for the battery terminal
(see battery specifications). To prevent terminal damage, contact Rolls Battery
Technical Support for torque recommendations if the specific terminal type is not listed.
Calibrate the torque wrench before use to ensure accuracy.
NOTE: Damage to terminals and/or batteries caused by under/over-torque is often
unrepairable and is not covered under manufacturer warranty. Distributors or Dealers
may offer replacement or repair, where possible, at the customer's expense.
BATTERY RECOMMENDED TORQUE SETTING
FLOODED TERMINALS N-m lb-ft
FLAG, PADDLE RR 27 N-m (max: 33 N-m) 20 lb-ft (max: 25 lb-ft)
LT 24 N-m (max: 33 N-m) 18 lb-ft (max: 25 lb-ft)
DT 11 N-m (max: 16 N-m) 8 lb-ft (max: 12 lb-ft)
UTL 11 N-m (max: 16 N-m) 8 lb-ft (max: 12 lb-ft)
AGM TERMINALS N-m lb-ft
THREADED FEMALE F8 (M8) 10 N-m 7.4 lb-ft
THREADED FEMALE F10 (M10) 13 N-m 9.5 lb-ft
AP 7 N-m 5.1 lb-ft
LT 10 N-m 7.4 lb-ft
DT 7 N-m 5.1 lb-ft
M6 (TP06) BRASS 4.5 N-m 3.3 lb-ft
M8 (TP08) BRASS 10 N-m 7.4 lb-ft
OPzV GEL TERMINALS N-m lb-ft
THREADED FEMALE F10 (M10) 21 N-m 15 lb-ft
PARALLEL & SERIES CONNECTIONS
Applications often demand more voltage or more ampere capacity than the capacity
of one battery. By connecting multiple batteries of the same make/model/capacity
in series, parallel or series parallel configurations, output voltage or battery bank
amperage may be increased as needed.
To increase voltage, batteries are connected in series. Capacity of the battery bank
remains the same as voltage increases. To increase the available amount of current
and capacity, batteries are connected in parallel. In this situation it is best to use lower
voltage, higher capacity cells to minimize the amount of parallel strings.
To increase voltage, connect the batteries in series as shown in Figure 1.
-
+
6
+
FIGURE 1:
Voltage Increase
-
To increase capacity and voltage, connect the batteries in series parallel
-
++ + + + + + + + + + ++
++++++ +++++
---
+
++ + + + + + ++
++ + ++
++
++
as shown in Figure 2.
EXAMPLE:
Battery = 6-volt (S6 L16-HC)
Battery Voltage = 6V each
Battery Capacity = 445 AH each
+
-
+
-
FIGURE 2:
Voltage/Capacity
++
Increase
System Voltage = 12V System
Capacity = 890 AH total
-
-
EXAMPLE:
Twenty-four (24) 2-volt batteries at 2527 AH each = 2527 AH at 48 Volts
- - - - - - - - - - --
- +
-
- -
---- ---
FIGURE 3:
Single Series String
-
+ “Best Option”
EXAMPLE:
Two (2) strings of eight (8) 6-volt batteries at 445 AH each
= 2 x 445 AH at 48 Volts = 890 AH at 48 Volts
- - - - - --
++++++ +
-
-
+
---- ---
-
FIGURE 4:
Two Parallel Strings.
Series/Parallel
EXAMPLE:
Three (3) strings of four (4) 12-volt batteries at 371 AH each
= 3 x 371 AH at 48 Volts = 1113 AH at 48 Volts
- --
++
---
-
Three Parallel Strings.
Series/Parallel
-
++
FIGURE 5:
-
NOTE: Connecting more than three (3) series strings in parallel is not recommended. Multiple
-
--
-
parallel connections increase resistance between batteries and strings, causing an imbalance of
charge and discharge currents and may result in cell damage or premature failure which is not
covered under Rolls Battery manufacturer warranty.
7
FLOODED
LEAD-ACID
BATTERIES
8
INSPECTION & INITIAL CHARGE OF FLOODED
LEAD-ACID BATTERIES
WARNING
• ALWAYS WEAR THE PROPER PERSONAL PROTECTIVE EQUIPMENT
(GOGGLES, GLOVES, CLOTHING) WHEN HANDLING FLOODED BATTERIES
AND ELECTROLYTE.
• WET BATTERIES MUST BE FULLY CHARGED BEFORE BEING DELIVERED
TO THE END USER.
• UNLESS INSTRUCTED BY ROLLS TECHNICAL SUPPORT, NEVER ADD ACID
TO THE BATTERIES AT ANY TIME. USE DISTILLED WATER ONLY.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN MALFUNCTION
AND WILL VOID WARRANTY.
A battery may not be fully charged when received. An initial charge brings the battery to
an operational state. Before charging, inspect for physical damage, check polarity and
electrolyte levels in each cell. Ensure the electrolyte (liquid) covers the plates
completely. It is normal for electrolyte levels to lower as the battery case will relax
(bulge) slightly after filling. If the plates are exposed, add distilled water until all are
just submerged. It is important not to overfill each cell as the electrolyte level will
rise during the charging process. Charge voltages are indicated in Table 2 (a) & 2 (b)
Flooded Charging Parameters.
INITIAL INSPECTION & CHARGING
1. Inspect the batteries for damage. Important: read all warning labels on batteries
before proceeding.
2. Flooded batteries are fully charged and tested before shipping. However, deep cycle
batteries will self-discharge when not in use during transportation and storage. Upon
installation, the initial charge brings the battery to an operational state. Before this
charging process, electrolyte levels should be checked, making sure the plates are
covered in each cell. If required, add distilled water until the plates are fully submerged.
It is important not to overfill as the electrolyte level will rise slightly during charge.
3. Check for correct polarity. Attaching the positive and negative voltmeter lead to the
positive and negative battery terminal should provide a positive voltage reading. If it
is negative, a reverse polarity condition exists, and you should contact your dealer or
Rolls Battery Technical Support to advise.
4. Place batteries on charge. Please see Table 2(a) & 2(b) Flooded Charging Parameters
for required charging parameters. Do not let the cell temperature exceed 52°C (125°F).
If the temperature becomes excessive or the cells begin to gas vigorously, reduce the
rate of charge. Continue charging until all cells reach the specific gravity of the filling
acid. All cell specific gravities should be even (1.260-1.280) when resting at full charge.
9
FLOODED LEAD-ACID BATTERY CHARGING
INITIAL CHARGE
Although all Rolls batteries are tested and charged prior to shipping, batteries will
self-discharge when stored and not in use. Upon installation, the initial charging
may take 10+ hours or more depending on the size of the battery bank and charge
current. Once the battery is fully charged, recheck the electrolyte level in the cell.
The fluid should be 6-12mm (1/4”-1/2”) below the vent tube on each cell as shown
in Figure 7. Carefully add distilled water to adjust as needed.
MULTI-PHASE CHARGING
The most common charge method for Flooded deep cycle batteries is a three-phase
charge cycle with periodic equalizations. Always be sure to follow the recommended
charging parameters as these will vary. Often, pre-programmed default settings are
not in line with the battery manufacturer's recommended voltage settings. Using these
may result in damage or battery failure which is not covered under the manufacturer
warranty. Refer to the charger manufacturer for specific programming instructions.
BULK CHARGE
The first of the three-phase charging process is the Bulk charge. During this stage the
maximum amount of current flows into the battery bank until a desired programmed
voltage is reached. For Flooded models, the recommended Bulk charge current is 10%
of the AH capacity of the battery bank, based on the 20 Hr AH rate (C/20) (min 5%, max
20%). Higher charge current may cause the battery bank to overheat or damage the
cells. A lower charge current may be used, however, this will prolong the required charge
time and increase the potential for sulfation buildup. Bulk charge voltage set points are
outlined in Table 2 (a) & 2 (b) Flooded Charging Parameters.
ABSORPTION CHARGE
The second and most important phase of the charge cycle is the Absorption charge. The
Bulk charge typically brings the battery bank to approximately 80% SOC. Once reached,
the charger will then switch to the programmed Absorption voltage to complete the
charging cycle. Most three-phase chargers include an Absorption charge time setting
allowing the user to program the duration of time needed to reach a full state of charge
(100% SOC). To set the Absorption charge time, a calculation is done using the 20 Hr
AH rating of the battery bank (C/20) and the actual measured charge current and/or
max charger output. As the battery bank nears 100% SOC, internal resistance in
the battery increases and charge current begins to decrease. It is assumed that over
the time of the Absorption charge that 50% of your maximum charge current will be
available. The Absorption Charge Time calculation uses a multiplier of 0.42 for Flooded
models which factors in assumed loss of current during the Absorption charge phase.
10
ABSORPTION CHARGE TIME - FLOODED
Where: T = 0.42 x C /I T = ABSORPTION CHARGE TIME
C = 20 hr RATED CAPACITY (total AH capacity of battery bank)
I = Charging Current (Amps) (*see Note: CHARGING CURRENT below)
0.42 = (factors in assumed current loss during Absorption charge phase)
EXAMPLE:
2 strings of 6 Volt 6 CS 25P models
C = 20 hr AH rate = 853 AH x (2 strings) = 1706 AH
I = 10% (recommended) of 1706 AH = 170 Amps
T = 0.42 x 1706/170 = 4.2 hrs
However, if actual measured current is less (~160 Amps), or maximum charger output
is limited to 160 Amps, 160 is used. (Ex. 2 x 80 Amp controllers)
T = 0.42 x 1706/160 = 4.48 hrs
NOTE: CHARGING CURRENT - Actual measured current output (Amps) to the battery
bank should be used in this calculation. Recommended charge current for Flooded
models is 10% of the 20 Hr AH rating of the battery bank (C/20) (min 5%, max 20%)
Charge source(s) and chargers should be properly sized, based on the rated capacity
of the battery bank, to ensure adequate charge output. Maximum charger output
applies when the generated output meets or exceeds this threshold.
FLOAT CHARGE
When the Absorption charge phase has completed and the batteries have reached
100% SOC, the charger will continue to output at a lower voltage setting known as
Float. Float voltage maintains the battery bank at a constant 100% SOC until the
charge output diminishes (Ex: solar) and/or a load is applied which begins to discharge
the battery bank. To prolong battery life, the Float settings on the power supply
should be adjusted to the voltage indicated in Table 2 (a) & 2 (b) Flooded Charging
Parameters. Higher or lower voltage settings may result in unnecessary overcharge
or sulfation buildup.
END AMPS OR RETURN AMPS
As batteries near full capacity, charge current decreases. End Amps, Return Amps or
Tail Current refers to the lowest output of current (Amps) flowing to the batteries as
they have reached full capacity. Some chargers will determine this set point has been
reached by monitoring current output to the battery bank. If the charge current drops,
reaching the End Amps/Return Amps/Tail Current set point before the programmed
Absorption time has completed, this will trigger the charger to shut off or switch to
the Float voltage phase which holds the battery bank at 100% SOC. The charger will
complete the full programmed Absorption time if this set point is too low or
programmed at 0%.
The recommended End Amps/Return Amps/Tail Current set point for Rolls Flooded
models is 2% of the 20 Hr AH rating (C/20) of the battery bank. Typically, when
current drops to the 2% set point for 1 hour, the battery bank has reached 100% SOC.
11
Rolls Flooded models with Advanced NAM may have a slightly higher End Amps/
Return Amps/Tail Current set point as the cells are less resistant to charge and
current output will remain slightly higher at 100% SOC. (2% recommended, 2-5%
range) An adjustment to this set point may be required when these models replace
other Flooded batteries. Test specific gravity at Float Charge to confirm 100% SOC.
WARNING: The End Amps/Return Amps/Tail Current setting, combined with sulfated
batter(ies), may confuse the charger as added resistance will reduce the flow of
current. This may falsely trigger the charge to end the Absorption charge prior to
reaching 100% SOC. Test specific gravity regularly to confirm the battery bank has
reached 100% SOC and adjust this set point and/or Absorption time as necessary.
LOW VOLTAGE DISCONNECT (LVD OR LVCO)
Many charging systems offer the ability to program a Low Voltage Disconnect (LVD)
or Cut Off (LVCO) which triggers an alternate power source (often a generator) to turn
on and begin charging the battery bank. When the programmed low voltage setting
is reached, the system initiates the charge source which then safeguards from overdischarge. By default, this may be set by the charger manufacturer at 1.75 volts per
cell (VPC). Always verify the default settings and adjust as required.
LVD/LVCO setting is often a personal preference. Deep cycle batteries are intended
to be discharged no more than 50%. Allowing the battery bank to discharge to a lower
voltage will reduce over all cycle life. Alternatively, a higher set point may result in more
frequent use of the alternate charging source (ex: generator) when discharge reaches the
low voltage cut-off. To maintain cycle life and prevent heavy-discharge, Rolls recommends
setting LVD/LVCO between 1.90-1.95 volts per cell (VPC). This may be adjusted up or
down, depending how often you wish to run the alternate charging source (generator or
alternative power) when the voltage of the battery bank reaches the programmed set point.
WARNING: LVD/LVCO only cuts off the draw from the inverter/ charger. It does not
disconnect all loads from the battery bank. A prolonged draw will eventually lead
to over-discharge and possible battery failure or damage.
OTHER CHARGER MODES
Inverter and charge controller manufacturers may include additional settings. Rolls
recommends contacting the manufacturer for guidance and to better understand how
these settings function. Default settings are typically not in line with the required
charge voltages and time. Charge & Float voltages and Absorption time calculations
are provided by the battery manufacturer and are specific to the make & model.
See Table 2 (a & 2 (b Flooded Charging Parameters.
FLOODED LEAD-ACID BATTERY - CHARGE EFFICIENCY / CHARGE FACTOR
Charge efficiency is a measure of the energy you may take out of a charged battery
divided by the energy required to charge it. Charge efficiency will depend on a number
of factors including the rate of charging or discharging. Charge efficiency for Flooded
deep cycle models is typically 80%. This should be reduced 1% per year after the third
(3) year of operation.
12
ROLLS FLOODED BATTERY CHARGE
VOLTAGE PARAMETERS
NOTE: Use the highlighted voltage set points when charge equipment is supplied
with a temperature sensor. Set at 5mV/ºC/Cell...(+/- 120mV per ºC from a 25ºC
Delta - 48V System)
TABLE 2 (a): Flooded Charging Parameters: Regular Cycling - daily to 48-hour
cycling (max 50% DOD) with limited charge time (solar). Example: full-time off-grid
applications and Partial State of Charge (PSOC) recovery.
TABLE 2 (b): Flooded Charging Parameters: Infrequent Cycling - infrequent cycling
with grid-connected charging (Marine/RV/Industrial), off-season/part-time off-grid
solar applications or grid-tied battery-backup systems.
13
TEMPERATURE COMPENSATION
& SENSOR INSTALLATION
For charge accuracy and safety, many systems use a sensor mounted to the battery to
measure cell temperature and adjust charge voltage accordingly. Temperature sensors
should be installed directly on the side of a cell or battery in the center of the bank
and must be securely mounted below the electrolyte level to determine accurate cell
temperature. See Figure 6 Temperature Sensor below. When using chargers that do not
feature temperature compensation, voltage settings should be monitored and adjusted
based on actual cell temperature. Failure to use or properly install the provided sensor
may cause damage due to over/undercharge which is not covered under Rolls Battery
manufacturer warranty. As a precaution, this sensor may also trigger a programmed
safety charge cut-off as the battery bank should not exceed an operating temperature
of 52ºC (125ºF).
NOTE: FOR ACCURACY, THE TEMPERATURE SENSOR SHOULD NOT BE MOUNTED
TO THE BATTERY TERMINAL OR TOP OF THE BATTERY CASE.
Series 4000, 4500, VRLA AGM & OPzV GEL models – the temperature sensor should
be mounted on a battery in the middle of the string or battery bank. To ensure an
accurate reading of cell temperature, the sensor must be mounted below the liquid level
on Flooded models and not attached to a terminal or top of the battery case as these
areas are generally cooler than the internal cell. For traditional Flooded, VRLA AGM
& OPzV GEL models, Rolls recommends attaching the sensor half way down the side
of the battery and/or 10-12cm (4-5”) from the top of the case for the most accurate
temperature reading.
Dual-Container Models – If the battery has a modular, dual-container construction,
such as Series 5000 models, the temperature sensor must be mounted directly to the
side of an internal cell. To access the cell, disconnect the terminal connections and
remove the outer cover which snaps on to the case or may use small removable plastic
pins. Mount the sensor to the internal cell and run the connecting cable between the
case, being careful not to pinch or damage the wire when placing the cover back on.
Automotive silicone is used to seal around each terminal to protect against spills, dust &
debris. This may be reapplied when the case has been reassembled.
FIGURE 6:
Temperature
Sensor
Dual-Container Models - Remove case cover. Mount sensor to the side of internal
cell below liquid level. Replace the cover and re-seal around terminals with silicone.
14
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