Reliance SG-720 User manual

WARNING: Batteries, battery posts, battery terminals, and related accessories can expose you to chemicals including lead
and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm.
For more information, go to P65Warnings.ca.gov

Thank you for purchasing a Reliance SG-720
High Frequency Industrial Battery Charger!
If you experience any issues with this product or have any questions,
please see contact info on the back of this user manual.
Table of Contents
SafetyInstructions/Precautions.........................2
Built-InSafetyFeatures................................4
Introduction..........................................5
Operation ..........................................10
Faults ..............................................11
WarrantyInformation.................................12
Parameters&Dimensions.............................13

Table of Contents
Model: SG-720 (High Frequency Industrial Charger)
Before using this battery charger, read all instructions and warning
labels on charger and vehicle.
Reduce risk of injury, property damage, and/or fire: if you do not
carefully read and follow these safety instructions, injury, death,
property damage, and/or fire can occur.
DANGER – Risk of Electric Shock:
• Always disconnect the charger handle from the vehicle and unplug
the AC power before servicing vehicle. By only turning o the charger
there is still risk of electric shock.
• Never touch the uninsulated portion of the AC or DC connectors or
uninsulated battery terminals.
• Ensure all electrical connectors are in good working condition: do
not use cracked or corroded connectors or those that make poor
electrical contact. Use of damaged connectors can result in electric
shock and/or overheating.
• Do not attempt to disassemble, modify, or service charger. No user
serviceable parts are inside. Service must be performed by a qualified
service technician. Improper reassembly can result in explosion, fire,
or electrical shock. Contact technical support if the charger is not
working properly. Attempting to disassemble the charger will void all
remaining warranty.
• Always connect to a properly grounded 3-wire outlet. Never modify
the AC cord. If it will not fit an outlet, have the proper outlet installed
by a qualified electrician. Extension cords are not recommended,
but if used must be a 3-wire grounded cord of at least 14AWG and
less than 25 ft long. Improper extension cords may result in electrical
shock or fire.
IMPORTANT Safety Instructions/Precautions
1

WARNING:
• To reduce risk of fire, do not use near flammable materials or vapors.
Always install or use the charger on a non-combustible surface
(metal, brick, concrete, etc).
• Lead acid batteries generate hydrogen gas which can explode if
ignited. Never smoke near batteries. Never allow conductive objects
such as wrenches, jewelry, or other metal to connect across battery
terminals. Do not disconnect the DC charging cord while charger is
operating. This can cause arcing and/or explosion.
• Always ventilate enclosed areas during charging to prevent buildup of
explosive hydrogen gas.
• Lead acid batteries contain sulfuric acid. When working on or near
batteries always wear eye/face protection (goggles, face shield, etc).
Protective gloves are recommended. If acid contacts eyes, flush with
clean water for 15 minutes and seek immediate medical attention. If
acid contacts skin, immediately wash thoroughly with soap and water.
If any burns or other complications occur, seek medical attention.
If acid contacts clothing, clean thoroughly and separately from any
other clothing and allow to completely dry.
• Never charge a frozen or non-rechargeable battery as they may
explode, causing injury, death, property damage, and/or fire.
• Always keep cell phones away from batteries while in the charging
process. Cell phones can create sparks which can lead to explosions
causing personal injury or damage or death.

CAUTION:
• Ensure your vehicle has the same type of batteries installed as shown
on the label before charging (voltage/cell count/amp hour capacity).
Other types of batteries may explode, causing personal injury or
damage.
• Use only with flooded lead-acid batteries. This charger may not
be used with VLRA (sealed), AGM or gel type batteries. Using this
charger with other types of batteries may cause explosion, injury, fire,
or damage. Additionally, the use with other batteries may also void the
battery, vehicle, and/or charger warranties.
• Never operate this charger if it has received any physical damage,
been dropped, or received a sharp blow. Always have a qualified
service repair technician examine and repair as needed.
• Ensure that the vehicles battery system has the properly rated
voltage, amp hours and type (flooded lead acid) for this charging
system.
KEEP THIS MANUAL:
Ensure this manual is saved in a location where it is readily
available for anyone who may need to operate this charger.
Failure to follow these instructions could result in serious damage
to you and/or your vehicle. Please read this manual in its entirety
prior to charger operation.
3

Built-In Safety Features
OVER TEMPERATURE PROTECTION
If the charger exceeds normal operating temperatures, power
output will be decreased until regular operating temperatures
resume. If the charger exceeds 149° F, the charger will
automatically stop charging and go into standby mode until
normal operating temperatures are detected and charging can
safely be resumed.
REVERSE POLARITY PROTECTION
If one or more batteries are connected improperly, the charger
will automatically shut down to prevent any potential damage to
the batteries.
NO LOAD PROTECTION
When the charger DC paddle is disconnected, the charger will
provide zero output to the DC output connection.
SHORT CIRCUIT PROTECTION
If a short-circuit is detected, the charger will automatically shut
down. Once the short circuit is rectified, the charger will resume
its normal charging status.
AUTOSHUT DOWN
When the batteries reach the fully charged state the charger will
automatically shut down and provide zero DC output and a solid
green light.

Unpacking and Inspection
• When unpacking your Reliance SG-720 charger be sure to inspect
for any damage that may have occurred during shipping. If you
identify any shipping damage, please report the issue as a claim with
the freight company.
• Do not operate the charger if there is any damage to the unit, the AC
cord or the DC cord/paddle.
Charger Mounting Recommendations
The Reliance SG-720 charger has four mounting holes and two hanger
holes in the aluminum base to allow the end user multiple mounting
configurations.
When mounting the Reliance SG-720 charger, 1/4 - 20 nuts and bolts are
recommended to secure the charger. Using screws is not recommended.
The center holes can be used with a securely mounted hook to hang the
charger.
Introduction
5

This charger can be mounted in several dierent configurations:
1. Preferred mounting orientation
• Horizontally flat mounted with fan (handle)
facing upwards with no obstruction
• Vertically mounted with AC/DC cords facing up or down
• Side mounted with AC/DC cords facing left or right
2. Non-Preferred Mounting Orientation
• Horizontally mounted with fan (handle) facing the ground
NOTE: Always mount the charger to a noncombustible material surface
(metal/ brick/concrete). When choosing an installation location, ensure
there is space around the fan to provide sucient cooling - at minimum
3 inches.
Battery Types
• The Reliance SG-720 should only be used with deep cycle flooded
lead acid batteries produced by the following manufacturers: Trojan,
JCI, Crown, and U.S. Battery. The charge profile for this charger is
optimized for Trojan 6 x T-105 (36V), 6 x T-875 (48V) or 4 x T-1275
(48V) depending upon the model selected.
• Using this charger with other types of batteries may cause explosion,
injury, fire, and/or damage. Additionally, use with other batteries may
void the battery, vehicle, and/or charger warranties.
• Ensure you observe all battery manufacturers precautions.

AC Input
• The Reliance SG-720 is designed to accept an AC input range of
90-120 VAC (45-65 Hz).
• The max current rating for the Reliance SG-720 is 7A @ 111VAC.
• The charger may reduce its output power if its supply voltage drops
below 90 volts.
• The supplied AC power cord must be used with an outlet that is
properly installed and grounded in accordance with all applicable
electric codes and ordinances.
NOTE: Never use the charger with a damaged AC cord or plug. Extension
cords are not recommended, but if used must be a 3-wire grounded cord
of at least 14AWG and less than 25 ft long. Improper extension cords may
result in electrical shock or fire.
DC Output
• The DC output cord set includes a commonly used connector/plug.
The polarity of the charger DC connector/plug must be the same as
the battery connector. The BLACK DC cable must be connected to
the battery negative (-), and the WHITE or RED DC cable must be
connected to the battery positive (+). This charger will not operate if
the polarity is reversed.
NOTE: The Reliance SG-720 charger does not activate vehicle charger
interlock features which prevent movement while plugged in. Always
disconnect the DC paddle prior to attempting to move the vehicle.
7

Charging
With the DC Charger Paddle installed in the vehicles charger receptacle the
LED indicator will illuminate one of the following patterns:
• The Reliance SG-720 charger will stop charging once batteries reach
100% state of charge, indicated by a solid green LED status light.
• Once the charge cycle is complete, the charger will go into a float
charge mode. In this mode, the charger continuously monitors battery
voltage; the charger will turn on after 30 days or when battery state
of charge reaches 80%, whichever comes first. Once state of charge
reaches 100% again, the charger will turn o and return to float
charge mode.
• Battery charge times can vary due to numerous factors (depth of
discharge, battery age, battery amp hour capacity).
Charging 0%-19%: Red flash, pause for 3 seconds
Charging 20%-79%: Red flash, pause for 1 second
Charging 80%-99%: Yellow flash, pause for 1 second
Charged 100%: Solid green light
Idle, Precharge Diagnostics, or Error:
Red-green flash (see faults on reverse)

Charging Location
• Always use charger in a well-ventilated area. Lead acid batteries
generate hydrogen gas which can explode if ignited. Never smoke
near batteries and keep sparks/flame away.
• If using an extension cord is absolutely necessary, please refer to the
precautions outlined in this instruction manual.
• This charger is not intended for use as an on-board charger.
Modifying charger for on-board use will void the warranty of the
charger, vehicle, and/or batteries.
Charger Maintenance
• If cleaning is required, always ensure the DC charger paddle is
disconnected from the golf cart charging port and the AC cord is
unplugged from the wall outlet.
• Never use any type of cleaning solvents on the charger. Use a slight
damp soft cloth to clean the charger.
9

1. Connect the AC power cord to a 3-prong grounded wall outlet.
Ensure the DC paddle is not connected to the vehicle prior to
insertion of the AC power cord. LED indicator will flash red/green/
red/green repeatedly.
2. Insert the DC paddle into the vehicle’s charger receptacle. The
charger’s built in fan will turn on and the LED indicator will continue to
flash red/green while determining the battery pack capacity and the
ambient temperature. Wait for the LED indicator light to indicate the
charge status (this can take up to 90 seconds – if the charger does
not indicate that it is charging, unplug it and see the troubleshooting
steps on page 11).
3. The charger will automatically start. The LED indicator will indicate
the state of charge (see page 8).
NOTE: During the charge cycle, if it becomes necessary to
disconnect the charger, first disconnect the AC power cord from the
wall outlet. You may then proceed to remove the DC paddle from the
vehicle’s charger receptacle.
4. When the batteries reach their full charge cycle the LED status
indicator will illuminate solid green. When this occurs, the charger
will auto terminate.
• Charging times can vary due to numerous conditions as
described in Introduction.
5. Before you prepare to drive the vehicle, you must disconnect the
DC charger paddle from the vehicles charger receptacle by firmly
grasping the DC charger paddle and pulling it straight out of the
receptacle.
6. When the DC charger paddle has been removed, unplug the charger
from the AC wall outlet (If not frequently used).
7. Store the charger in a safe place when not in use.
Operation

11
Error LED Flash Pattern Resolution
No-Load (Idle)
Check connections of
batteries and of charger.
Check for low battery voltage.
Over-Voltage or
Current
Unplug charger from wall
and vehicle, wait 5 minutes,
and try again.
Over or Under
Temperature
Verify that ambient
temperature is between -22 °F
and 149 °F. Make sure charger
and vehicle are well-ventilated.
Charger Overheat
Make sure charger is well
ventilated and cooling fan is
functioning.
Charger
Under-Voltage Contact Tech Support.
Input AC Abnormal Check the input voltage and
plug contact.
After flash pattern repeats 5 times, charger will flash
Green-Red-Green-Pause before repeating.
If error resolutions above do not resume normal charging, contact
Tech Support. Do not continue to attempt to use the charger.
Reliance SG-720 Charger Faults

The Reliance SG-720 Industrial battery charger comes with an 18-month
limited warranty.
This is a non-transferable 18-month limited warranty available only to the
original end user. The warranty coverage starts on the date of purchase.
Within this coverage period, any manufacturer’s defect will warrant a
full replacement charger at zero cost to the consumer, excluding any
replacement shipping costs.
EXCLUSIONS & LIMITATIONS
• This warranty does not cover any commercial or rental usage of the
charger and such use of the charger shall void the warranty.
• The warranty does not cover normal wear and tear of the charger
including, but not limited to, minor cosmetic damage and blemishes.
• Damages outside of normal wear and tear caused by accident,
misuse or modification will not be covered by this warranty.
• The purchaser is responsible for the cost of regular maintenance or
replacement parts outside the scope of the limited warranty. Before
using the charger, the purchaser is responsible for determining the
compatibility of the charger with their vehicle charging application.
Warranty

Compliance
This product meets UL1012:2010 R4.16, DOE 10 CFR Part 430, CAN/
CSA-C22.2 No. 107.2-01+GI1+GI2 (R2016), and CEC 400-2017-002
standards. Additionally, it complies with the Electromagnetic Compatibility
Directive 2014/30/EU, FCC Part 15, and Industry Canada’s ICES 003 for a
Class A digital device. Operation is subject to the following:
• Device may not cause harmful electromagnetic interference
• Device must accept any interference received, including interference
that may cause undesired operation
Product Recycling/Disposal
All end users of the charger must comply with relevant local laws and
regulations when recycling or otherwise disposing of the charger.
Parameters & Dimensions
Length 10.6 in
Width 6.2 in
Height 3.2 in
Height w/Handle 4.5 in
Weight 7.5 lbs
AC Cord Length 8 ft
DC Cord Length 8 ft
AC Input Voltage Range 90 - 120VAC; 45 - 65Hz
AC Input Max Current 8.0A @ 100VAC
Power Factor >0.98
Eciency >94.0%
Noise <50dB
IP (Ingress Protection) Rating IP65
Operating Temp -22 °F to 149 °F
Storage Temp -40 °F to 176 °F
Altitude 0-6500 feet
Humidity 5% to 95%
13

NEED HELP?
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Saturday: 9am - 2pm
Sunday: Closed
800-959-0852
[e-mail]
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