EnerSys PowerSafe OPzV User manual

Sustainable solutions
PowerSafe®OPzV
Operation Guide for Solar Applications

Operation Guide > PowerSafe®OPzV < 2
Specic Abilities
The specic abilities of this type of battery for renewable energy applications are as follows.
• Cycling (one “cycle” consists of a discharge, of any depth, followed by a recharge)
• Overcharge ability
• Cycling in state of discharge
• Low rate of self-discharge
• No addition of water required during service life
PowerSafe® OPzV are designed for applications where the battery must undergo repeated cycling with daily depths of
discharge of up to 35% of capacity C120 (such as rural settlements, communications systems and lighting systems etc.).
Cell Design
The PowerSafe® OPzV cells consist of:
• Tubular positive plates with Lead-Calcium-Tin alloy, diecast to offer longer service life thanks to an extremely
cohesive Lead-Calcium alloy grid
• Electrolyte immobilised as a gel
• Pressure Relief Valve - One way valve with integral ame arrestor
Features & Benets
• Excellent deep discharge recovery and cyclability
• Up to 5500 cycles to 20% depth of discharge, 1600 cycles to 60% DoD and 1200 cycles to 80% DoD
• Vertical or horizontal installation (see § 1.4 Commissioning (Installation & ventilation))
• No topping up required
Capacity
Capacity is the number of Ah a battery can supply for a well-dened current and an end of discharge voltage.
Capacity varies with the discharge time, discharge rate and temperature.
Example: Capacities vs discharge time for PowerSafe 6 OPzV 600 cell are as follows:
Discharge time 50 h 100h 120h
End voltage 1.85Vpc 1.85Vpc 1.85Vpc
Capacity at 25°C 823Ah 880Ah 894Ah
Safety precautions
Batteries give off explosive gasses. They are lled with dilute sulphuric acid, which is very corrosive. When working with sulphuric acid,
always wear protective clothing and glasses. Exposed metal parts of the battery always carry a voltage and are electrically live (risk of
short circuits). Avoid electrostatic charge. The protective measures according to EN 50272-2 and IEC 62485:2010 must be observed.
Care for your safety
No smoking
no naked ames,
no sparks
Shield eyes Note operating
instructions
Electrical hazard Danger
Recycle scrap
batteries.
Contains lead.
Electrolyte is
corrosive, in case
of broken
containers/lids
Clean all acid splash
in eyes or on skin
with lot of clear water.
Then visit a doctor.
Acid on clothing is to
be washed with water.
Warning: Risk of re,
explosion, or burns. Do not
disassemble, heat above
60ºC, or incinerate. Avoid any
short circuit. Metallic parts
under voltage on the battery,
do not place tools or items on
top of the battery.
Handling
OPzV batteries are supplied in a fully
charged state and must be unpacked
carefully to avoid short-circuit between
terminals of opposite polarity. The cells
are heavy and must be lifted with appro-
priate equipment.
Keep Flames Away
In the case of an accidental overcharge,
a ammable gas may be emitted from
the safety valve.
Discharge any possible static electricity
from clothes by touching an earth-
connected part.
Tools
Use tools with insulated handles.
Do not place or drop metal objects onto the
battery.
Remove rings, wristwatch and metal articles of
clothing that might come into contact with the
battery terminals.
Warranty
Any of the following actions will invalidate the warranty - Non-adherence to the Installation, Operating and Maintenance instructions. Repairs carried out with non-
approved spare parts. Application of additives to the electrolyte. Unauthorised interference with the battery.

Operation Guide > PowerSafe® OPzV < 3
The nominal capacity of PowerSafe® OPzV cells for renewable energy applications is given as follows:
Capacity Ah Current A Discharge period h End voltage V/cell
C120 I120 120 1.85V
Discharge Rate: Is the ratio of discharge current divided by battery capacity
Depth of Discharge (DOD): Capacity removed from the battery compared to total capacity. It is expressed as a
percentage.
The battery will be sized for solar applications with a DOD < 80% for the autonomy required.
Daily cycle: The battery is normally used with a daily cycle as follows: Charge during the day hours and discharge
during night hours.
Typically daily use is between 2 to 20% DOD.
Effect of Temperature
On capacity: Correction factors of the capacity, according to the temperature are shown in the curve below.
If the temperature is other than 25°C, the correction factors must be applied to the installation rating in order to secure
an optimum service life.
Batteries for renewable energy applications
Effect of temperature on capacity
0,00
0,10
0,20
0,30
0,40
0,50
0,60
0,70
0,80
0,90
1,00
1,10
1,20
-20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45
Temperature in °C
Compensation coefficient for a
120 hr. Discharge to 1,85Vpc at 25°C
On the number of cycles: A rise in temperature brings about a decrease in the number of cycles (see below).
Batteries for renewable energy applications
Derating factor for number of cycles vs average cell temperature
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
1.10
20 25 30 35 40 45 50
Temperature in °C
Derating Factor

Operation Guide > PowerSafe® OPzV < 4
1 GENERAL OPERATING INSTRUCTIONS
1.1 Operating Temperature Range
The recommended operating temperature range for PowerSafe® OPzV technology is -15°C to 40°C (Humidity <90%).
Optimum life and performance is attained at +25°C.
All technical data relates to the rated temperature of +25°C.
1.2 Storage
Store the battery at a dry, clean and preferably cold and frost-free location. Do not expose the cells to direct sunlight,
otherwise defects on container and cover my occur.
Limit values for storage conditions: Temperature range of -20°C to +45°C, Humidity <90%
The self-discharge rate of OPzV batteries is a function of the temperature.
Temperature 20°C 30°C 40°C
Monthly self-discharge rate 2% 4% 8%
PowerSafe® OPzV technology has a shelf life of 12 months at 20°C (6 months at 30°C). Higher temperatures increase
the rate of self discharge and therefore reduce storage life.
This table gives the maximum storage period before refresh, at the given average storage ambient temperature:
Average storage ambient temperature Maximum storage time
20ºC 12 months
30ºC 6 months
40ºC 3 months
The table hereafter gives an indication of the state of charge of the cells from a reading of the open circuit voltage.
Batteries must be recharged when the OCV approaches 2.07Vpc.
State of charge Voltage
100% 2.13 Vpc
70% 2.09 Vpc
50% 2.06 Vpc
20% 2.02 Vpc
1.3 Freshening Charge
PowerSafe OPzV batteries must be given a refreshing charge :
a. when maximum storage time is reached or
b. when the OCV approaches 2.07Vpc whichever occurs rst.
The maximum storage times between refresh charge and recommended OCV audit frequency is given in the table below:
Temperature (ºC/ºF) Storage Time (Months) OCV Audit Interval (Months)
+20/+68 12 6
+30/+86 6 3
+40/+104 3 1.5
The refreshing charge should be conducted using constant voltage (adjusted to the temperature) eg. 2.25Vpc at 20-25°C
with 0.1 C10Amps current limit for a minimum period of 96h.
Alternatively, a refresh charge can be conducted using an applied constant voltage of 2.40Vpc at 20-25°C for 24-48h
maximum.

Operation Guide > PowerSafe® OPzV < 5
1.4 Commissioning
Installation & ventilation
The electrical protective measures and the accommodation and ventilation of the battery installation must be in
accordance with the applicable “local” national standards, rules and regulations.
Low ventilation requirement according to EN 50272-2 and IEC 62485-2:2010.
The battery should be installed in a clean, dry area.
For the installation of cells in the horizontal position, always ensure that the arrow on the lid of each unit is pointing in
vertical orientation.
- Do not use terminal posts to lift or handle cells.
- Ensure that the stand runners are located under the container rather than the lid and/or lid/container seal.
- Do not invert cells (vents upside down) or allow the front of the cells to be positioned lower than the base of the cell as it
might block the safety valve and damage pillars.
Avoid placing the battery in a hot place or in front of a window (no direct sunlight). Battery racks are recommended
for proper installation. Place the cells on the rack and arrange the positive and the negative terminals for connection
according the wiring diagram.
Check that all contact surfaces are clean. Tighten terminal screws, taking care to use the correct torque loading
(Tab.1). Fit the covers supplied for protection against direct contact.
Terminal screw Torque
M10 23 - 25 Nm
Follow the polarity to avoid short circuiting of cell groups. A loose connector can cause trouble in adjusting the system,
erratic battery performance, and possible damage to the battery and/or personal injury.
Commissioning
The initial charge is extremely important as it will condition the battery service life. So the battery must be fully recharged
to ensure that it is in an optimum state of charge.
Case 1: Using a constant voltage charger. Cells here will need to be recharged at a constant voltage of between 2.35
and 2.40 Vpc (maximum) at 25°C for a minimum of 48h and a maximum of 72h with a current limited to 0.10C10.
Temperature compensation for charge voltage should be applied at the rates shown below:
Temperature ºC Charge Voltage (Vpc)
+10 2.45
+20 2.42
+25 2.4
+30 2.38
+40 2.35
Case 2: With no external source available for recharging. Connect the battery to the solar module controller and leave
at rest for 1 to 2 weeks. For this charge, set the regulator to the values given in the § 2.3 Setting charging voltages.
Temperature ºC Voltage
Low charge-restart voltage 0 to 20ºC 2.30V
20 to 40ºC 2.30V
High charge-disconnect voltage 0 to 20ºC 2.50V
20 to 40ºC 2.45V

Operation Guide > PowerSafe® OPzV < 6
End-of-charge reading
The battery is charged once open-circuit voltage (OCV) readings after 24h of rest are in conformity with the values
shown on the above table.
The table hereafter gives an indication of the state of charge of cells from a reading of open circuit voltage.
State of charge Voltage (Vpc)
100% 2.13
90% 2.12
80% 2.105
70% 2.09
50% 2.06
1.5 Disposal
Lead acid PowerSafe® OPzV batteries are recyclable. End of life batteries must be packaged and transported
according to prevailing transportation rules and regulations. End of life batteries must be disposed of in compliance
with local and national laws by a licensed battery recycler.
1.6 Products Covered by this Guide
General Specifications Nominal
Capacity (Ah) Nominal Dimensions
Type Nominal
Voltage
(V)
Number
of
Terminals
10 hr rate
to
1.80Vpc
@20°C
120 hr rate
to
1.85Vpc
@25°C
Length
mm in
Width
mm in
Height
mm in
Typical
Weight
kg lbs
Short
Circuit
Current
(A)
Internal
Resistance
(mΩ)
4 OPzV 200 2 2 215 273 103 4.06 206 8.12 403 15.88 19.5 43 2195 0.95
5 OPzV 250 2 2 265 343 124 4.89 206 8.12 403 15.88 23.5 51.9 2737 0.76
6 OPzV 300 2 2 320 413 145 5.71 206 8.12 403 15.88 28.0 61.8 3175 0.66
5 OPzV 350 2 2 385 484 124 4.89 206 8.12 520 20.49 31.0 68.4 3410 0.61
6 OPzV 420 2 2 465 574 145 5.71 206 8.12 520 20.49 36.5 80.5 4043 0.51
7 OPzV 490 2 2 540 678 166 6.54 206 8.12 520 20.49 42.0 92.6 4607 0.45
6 OPzV 600 2 2 705 895 145 5.71 206 8.12 695 27.38 50.0 110.3 3796 0.55
8 OPzV 800 24 940 1187 210 8.27 191 7.53 695 27.38 68.0 150 5200 0.40
10 OPzV 1000 24 1170 1491 210 8.27 233 9.18 695 27.38 82.0 180.8 6460 0.32
12 OPzV 1200 24 1410 1796 210 8.27 275 10.84 695 27.38 97.0 213.9 7675 0.27
12 OPzV 1500 24 1600 1967 210 8.27 275 10.84 845 33.29 120.0 264.6 7510 0.28
16 OPzV 2000 262110 2629 212 8.35 397 15.64 820 32.31 165.0 363.8 10048 0.21
20 OPzV 2500 28 2640 3272 212 8.35 487 19.19 820 32.31 200.0 441 12606 0.17
24 OPzV 3000 28 3170 3932 212 8.35 576 22.69 820 32.31 240.0 529.2 14964 0.14
Notes: The electrical values shown in the table relate to perfomance from a fully charged condition at ambient temperature of +25°C.
Height shown is overall height, including connectors and shrouds.

Operation Guide > PowerSafe® OPzV < 7
2 CYCLIC OPERATION
2.1 Cyclic Performance
The graph below shows cycling capability of PowerSafe® OPzV products:
PowerSafe®OPzV Cycle Life
Number of Cycles versus Depth of Discharge
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
10500
11000
11500
12000
10 20 30 40 50 60 70 80
Depth of Discharge (%) @ 25°C
Number of Cycles
2.2 Discharging
Do not over-discharge the battery. This can be avoided by including a Low Voltage Disconnect (LVD) switch in the circuit or
by disconnecting the battery from the load when the end discharge voltage is reached.
As a rule, installations will be equipped with a regulator whose voltage threshold values will protect against deep discharge:
Discharge time
10h 120h 240h
Low voltage alarm per cell 1.92V 1.92V 1.95V
Disconnect voltage per cell (LVD) 1.80V 1.85V 1.90V
2.3 Setting Charging Voltages
In order to ensure optimum “pulsing“ recharge process, the following setting charge disconnect and restart voltages
(Solar charge off on and solar charge voltages) can be applied:
Temperature
-20 to 0ºC 0 to 20ºC 20 to 35ºC > 35ºC
Low recharge-restart voltage (Vpc) 2.35V 2.30V 2.30V 2.25V
High recharge-disconnect voltage (Vpc) 2.55V 2.45V 2.40V 2.35V
The voltage/temperature compensation is + 3mV/°C/Cell for a temperature lower than 25°C(77°F) (the reference
temperature being 25°C) and - 3mV/°C/Cell for a temperature higher than 25°C.
3 SERVICE LIFE
Under normal operating conditions, the battery lifetime largely depends on the temperature and depths of discharge. The
service life in cycling applications is based on the number of years with a daily depth of discharge and can never exceed
the design life at 20°C of 20 years.
Inuence of temperature (see curve page 3).

Operation Guide > PowerSafe® OPzV < 8
Example of a PowerSafe® OPzV battery cycling with 20% daily:
Average temperature
of cells
Number of cycles at
25°C
Compensation
coefficient
Estimated average number of cycles at
average temperature
25ºC 5500 15500
30ºC 5500 0.83 4565
35ºC 5500 0.71 3905
See curve (item 2.1), relative to number of cycles according to DOD at 25°C.
Example of a PowerSafe® OPzV battery at 25°C:
Daily depth of discharge Number of cycles at 25°C Estimated life expectancy
20 5500 15 years
4 MAINTENANCE CHECKS DATA RECORDING
PowerSafe® OPzV cells are VRLA batteries and do not have to be topped up.
• Do not open the valve. Opening could cause lasting damage to the battery and is prohibited.
• The containers and lids should be kept dry and free from dust. Cleaning must be undertaken with a damped cotton
cloth without additives and without manmade bres or addition of cleaning agents, never use abrasives or solvents.
• Do NOT use any type of oil, solvent, detergent, petroleum-based solvent or ammonia solution to clean the battery containers
or lids.
• Avoid electrostatic charging.
• Every 6 months, check total voltage at battery terminals (if necessary adjust the charging voltages to the correct values
given in the §2.3), cell voltages of pilot cells, the cells surface temperature and battery room temperature.
• Once a year, take readings of individual cell voltages too (the cells should be within 4.5% of the average measured values).
• Keep a logbook in which the measured values can be noted (all readings should be recorded in a format where deviations
and trends are easily identiable) as well as time and date of each event like discharge tests etc.

EnerSys
P.O. Box 14145
Reading
Pennsylvania 19612-4145
USA
Tel. [phone]
Fax [phone]
EnerSys EMEA
EH Europe GmbH
Baarerstrasse 18, 6300 Zug
Switzerland
www.enersys.com
EnerSys Asia
152 Beach Road
Gateway East Building
Level 11
189721 Singapore
Tel: [phone]
Fax [phone]
www.enersys.com
Global & Americas Headquarters Regional Headquarters
www.enersys.com
Please refer to the website address for details of your nearest EnerSys ofce: www.enersys.com
© 2016 EnerSys®. All rights reserved. Trademarks and logos are the property of EnerSys and its afliates unless otherwise noted.
Publication No. EN-PS-OPzV OG-006 - September 2016 - Subject to revisions without prior notice. E.& O.E.
“We shall be the best in the industry by being
easy to do business with, while supplying
the highest quality products and services
on time and in the most cost-effective manner.”