GXSeries
User Guide
DANGER
PRIOR TO USE, READ AND UNDERSTAND
PRODUCT SAFETY INFORMATION.
Failure to follow the instructions may result
in ELECTRICAL SHOCK, EXPLOSION,
or FIRE, which may result in SERIOUS
INJURY, DEATH, DAMAGE TO DEVICE or
PROPERTY. Do not discard this information.
Welcome. Thank you for buying a NOCO Genius
GX Series Smart Charger. Read and understand the
User Guide before operating the charger. For questions
regarding our chargers, view our comprehensive support
information at www.no.co/support. To contact NOCO for
personalized support (not available in all areas), visit
www.no.co/connect.
What’s In The Box.
• GX Series Smart Charger
• AC Cable
• User Guide
• Information Guide and Warranty
®
Contacting NOCO.
1.800.456.6626
Phone:
support@no.co
Email:
Mailing Address:
About GX Series Chargers. The NOCO Genius
Series of chargers represents some of the most innovative
and advanced technology on the market, making each
charge simple and easy. The GX is designed for charging all
types of 24V, 36V or 48V lead-acid and lithium-ion battery
systems, including Wet (Flooded), Gel, MF (MaintenanceFree), CA (Calcium), EFB (Enhanced Flooded Battery), AGM
(Absorption Glass Mat), and LIB (Lithium Ion) batteries. It
is suitable for charging battery capacities from 25 to 500
Amp-Hours and maintaining all battery sizes.
Getting Started. Before using the charger, carefully
read the battery manufacturer’s specific precautions and
recommended rates of charge for the battery. Make sure
to determine the voltage and chemistry of the battery by
referring to your battery owner’s manual prior to charging.
Mounting. The GX Series Chargers have four (4) external
holes for mounting. Make sure there are no obstructions
behind the mounting surface. It is important to keep in mind
the distance to the battery. Allow for 12-inches (304mm) of
slack in cables between connections.
Charging Modes. The GX Series Chargers have seven
(7) modes: Standby, NORM, COLD/AGM, AGM+, LI-ION,
REPAIR and SUPPLY. Some charge modes must be
pressed and held for three (3) seconds to enter the mode.
These “Press and Hold” modes are advanced charging
modes that require your full attention before selecting. It
is important to understand the differences and purpose
of each charge mode. Do not operate the charger until
you confirm the appropriate charge mode for your battery.
Below is a brief description:
30339 Diamond Parkway, #102
Glenwillow, OH 44139
United States of America
®
GX
Basic Charging Modes
Voltage and current depend on model of charger.
Specifications for each model are listed below.
Mode Explanation
In Standby mode, the charger is not
charging or providing any power to
the battery. Energy Save is activated
Standby
NORM
GX2440
GX3626
GX4820
COLD/
AGM
GX2440
GX3626
GX4820
CAUTION:
ALWAYS VERIFY THE VOLTAGE OF A BATTERY
SYSTEM BEFORE ATTEMPTING TO CHARGE.
ONLY USE THE GX SERIES CHARGER THAT IS
DESIGNED FOR THE SAME VOLTAGE AS YOUR
BATTERY SYSTEM.
during this mode, drawing microscopic
power from the electrical outlet. When
selected, an orange LED will illuminate.
No Power
For charging Wet Cell, Gel Cell,
Enhanced Flooded, Maintenance-Free
and Calcium batteries. When selected,
a white LED will illuminate.
28.8V ± 0.3V | 40A ± 1A
43.2 +/- 0.45V | 26A ± 1A
57.6V +/- 0.6V | 20A ± 1A
For charging batteries in cold
temperatures below 50ºF (10ºC) or
AGM batteries. When selected, a blue
LED will illuminate.
29.4V ± 0.3V | 40A ± 1A
44.1V +/-0.45V | 26A ± 1A
58.8V +/-0.6V | 20A ± 1A
222
Advanced Charging Modes
IMPORTANT: Advanced Charge Modes are modes that
require the users full attention when selecting.
Mode Explanation
AGM+
Press & Hold
GX2440
GX3626
GX4820
LI-ION
Press & Hold
GX2440
GX3626
GX4820
REPAIR
Press & Hold
GX2440
GX3626
GX4820
SUPPLY
Press & Hold
GX2440
GX3626
GX4820
For charging advanced AGM batteries,
which requires a higher than normal
charging voltage. When selected, a
blue LED will illuminate.
31.2V ± 0.3V | 40A ± 1A
46.8V +/- 0.4V | 26A ± 1A
62.4V +/-0.6V | 20A ± 1A
For charging lithium-ion batteries,
including lithium iron phosphate. When
selected, a blue LED will illuminate.
29.2V ± 0.3V | 40A ± 1A
43.8V +/-0.45V | 26A ± 1A
58.4V +/- 0.6V | 20A ± 1A
An advanced battery recovery mode
for repairing and storing, old, idle,
damaged, stratified or sulfated
batteries. When selected, a red LED
will illuminate and flash.
32V ± 0.3V | 5A ± 1A
48V +/-0.45V | 5A ± 1A
64V +/-0.6V | 5A ± 1A
Converts to a DC power supply. When
selected, a red LED will illuminate.
27.2V ± 0.3V | 20A ± 1A
40.8V +/-0.45V | 13A ± 1A
54.4V +/-0.6V | 10A ± 1A
Using AGM+. [Press & Hold]
AGM+ charge mode is designed for advanced AGM
batteries only. Advanced AGM batteries are a new
battery technology. These batteries accept a higher than
normal charging voltage. AGM+ charge mode is NOT
suitable for traditional AGM batteries. Consult the battery
manufacturer before using this mode.
CAUTION. USE THIS MODE WITH CARE. THIS MODE
IS FOR LEAD-ACID ADVANCED AGM BATTERIES
ONLY. THIS MODE USES A HIGH CHARGING VOLTAGE
AND MAY CAUSE SOME WATER LOSS IN WET
(FLOODED) CELL BATTERIES OR OVERCHARGE IN
SOME BATTERIES.
Using LI-ION. [Press & Hold]
LI-ION charge mode is for lithium-ion batteries only,
including lithium iron phosphate batteries.
CAUTION. THIS MODE IS FOR LITHIUM BATTERIES
ONLY. LITHIUM-ION BATTERIES ARE MADE AND
CONSTRUCTED IN DIFFERENT WAYS AND SOME MAY
OR MAY NOT CONTAIN A BATTERY MANAGEMENT
SYSTEM (BMS). CONSULT THE LITHIUM BATTERY
MANUFACTURER BEFORE CHARGING AND ASK FOR
RECOMMENDED CHARGING RATES AND VOLTAGES.
SOME LITHIUM-ION BATTERIES MAY BE UNSTABLE
AND UNSUITABLE FOR CHARGING.
Using Repair. [Press & Hold]
Repair is an advanced battery recovery mode for
repairing and storing, old, idle, damaged, stratified or
sulfated batteries. Not all batteries can be recovered.
Batteries tend to become damaged if kept at a low
charge and/or never given the opportunity to receive
a full charge. The most common battery problems are
battery sulfation and stratification. Both battery sulfation
and stratification will artificially raise the open circuit
voltage of the battery, causing the battery to appear fully
charged, while providing low capacity. Use Repair in
attempt to reverse these problems. For optimal results,
take the battery through a full charge cycle, bringing the
battery to full charge, before using this mode. Repair can
444
take up to four (4) hours to complete the recovery process
and will return to Standby when completed.
CAUTION. USE THIS MODE WITH CARE. THIS MODE
IS FOR LEAD-ACID BATTERIES ONLY. THIS MODE USES
A HIGH CHARGING VOLTAGE AND MAY CAUSE SOME
WATER LOSS IN WET (FLOODED) CELL BATTERIES. BE
ADVISED, SOME BATTERIES AND ELECTRONICS MAY BE
SENSITIVE TO HIGH CHARGING VOLTAGES. TO MINIMIZE
RISKS TO ELECTRONICS, DISCONNECT THE BATTERY
BEFORE USING THIS MODE.
Using Supply. [Press & Hold]
Supply converts the charger to a constant current, constant
voltage DC power supply. To enter Supply Mode, the
charger must not be connected to the battery.
CAUTION. THIS MODE IS FOR LEAD-ACID BATTERIES
ONLY. PRIOR TO USE, READ YOUR DEVICE MANUAL
TO DETERMINE IF IT IS SUITABLE FOR USE WITH THIS
MODE. BOTH THE SPARK PROOF AND REVERSE
POLARITY SAFETY FEATURES ARE DISABLED IN THIS
MODE. DO NOT ALLOW THE POSITIVE AND NEGATIVE
BATTERY CLAMP OR EYELET TERMINAL CONNECTORS
TO TOUCH OR CONNECT TO EACH OTHER AS THE
CHARGER COULD GENERATE SPARKS. CHECK THE
POLARITY OF THE BATTERY TERMINALS BEFORE USING
THIS MODE.
Cable Connections
The GX Series Chargers have AC and DC connection
ports that are designed to allow the user to choose custom
cables to fit the desired application. Both the AC and DC
connection ports are labeled to inform the user the proper
way to install custom cables.
AC Input Connection Port
The AC Input Connection Port requires line (black), return
(white) and ground (green) connections. The unit must
be grounded for safe operation. 16AWG minimum wire
gauge is required. Make sure all connections are securely
tightened and insulated from each other before operation.
To increase the charger’s waterproofing, completely seal the
entire connection with electric sealant.
AC Input Connection Port
DC Output Connection Port
The DC Out Connection Port requires positive (red),
and negative (black) connections. 10AWG minimum
wire gauge is required. Make sure all connections are
securely tightened and insulated from each other before
operation. To increase the charger’s waterproofing,
completely seal the entire connection with electric
sealant.
Inhibit Port (Optional For Operation)
The Inhibit Port contains a Relay rated at 20A. When
the Charger has AC power, the relay will close allowing
current flow. When the charger is removed from AC
power, it takes approximately 15 seconds for the
capacitors to discharge and the relay to open.
Remote LEDs Port (Optional For Operation)
The Remote LEDs Port can be used to connect LEDs
for easy monitoring when the charger’s LEDs are not
accessible. The port supports two LEDs, reversing
polarity to change from “Charging” to “Charged.”
DC Output Connection Port
666
Connecting to the Battery.
Do not connect the AC power plug until all other connections
are made. Identify the correct polarity of the battery terminals
on the battery. The positive battery terminal is typically
marked by these letters or symbol (POS,P,+). The negative
battery terminal is typically marked by these letters or symbol
(NEG,N,-). Do not make any connections to the carburetor,
fuel lines, or thin, sheet metal parts. The below instructions
are for a negative ground system (most common). If your
vehicle is a positive ground system (very uncommon), follow
the below instructions in reverse order.
1.) Connect the positive (red) battery clamp or eyelet terminal
connector to the positive (POS,P,+) battery terminal.
2.) Connect the negative (black) battery clamp or eyelet
terminal connector to the negative (NEG,N,-) battery terminal
or vehicle chassis.
3.) Connect the battery charger’s AC power plug into a
suitable electrical outlet. Do not face the battery when making
this connection.
4.) When disconnecting the battery charger, disconnect in the
reverse sequence, removing the negative first (or positive first
for positive ground systems).
Begin Charging.
1.) Verify the voltage and chemistry of the battery.
2.) Confirm that you have connected the battery clamps or
eyelet terminal connectors properly and the AC power plug is
plugged into an electrical outlet.
3.) The charger will begin in Standby mode, indicated by an
orange LED. In Standby, the charger is not providing any
power.
4.) Press the mode button to toggle to the appropriate
charge mode (press and hold for three seconds to enter an
advanced charge mode) for the voltage and chemistry of
your battery.
5.) The mode LED will illuminate the selected charge mode
and the Charge LEDs will illuminate (depending on the
health of the battery) indicating the charging process
has started.
6.) The charger can now be left connected to the battery
at all times to provide maintenance charging.
User Interface
Mode Button
Charge Level LEDs
Standby LED
Mode LEDs
Error LED
Charge LEDs
888
Understanding Charge LEDs.
The charger has four (4) Charge LEDs per bank - 25%,
50%, 75% and 100%. These Charge LEDs indicate the
connected battery(s) state-of-charge (SOC). See the
explanation below:
LED Explanation
The 25% Charge LED will be “on”
25%
LED
50%
LED
75%
LED
100%
LED
when the battery is less than 25%
fully charged. The RED charging
LEDs will “spin” indicating the unit
is charging.
The 50% Charge LED will be “on”
when the battery is less than 50%
fully charged. The RED charging
LEDs will “spin” indicating the unit
is charging.
The 75% Charge LED will be “on”
when the battery is less than 75%
fully charged. The RED charging
LEDs will “spin” indicating the unit
is charging.
The 100% Charge LED will be “on”
when the battery is less than 100%
fully charged. The GREEN LED will
illuminate solid indicating the battery
is fully charged.
Understanding Advanced Diagnostics.
Advanced Diagnostics is used when displaying Error
Conditions. It will display a series of blink sequences
that help you identify the cause of the error and
potential solutions.
All Error Conditions are displayed with the Error LED
and Standby LED flashing back and forth. The
number of flashes between each pulse denotes a
potential Error Condition (except reverse polarity and
low-voltage battery).
Error Reason/Solution
Single
Flash
Double
Flash
Triple
Flash
Quadruple
Flash
Battery will not hold a
charge. Have battery
checked by a professional.
Possible battery short.
Have battery checked by a
professional.
Battery voltage is too high
for the selected charge
mode. Check the battery
and charge mode.
Abnormal AC grid power:
VAC <85V or >250V, or
Frequency <45Hz or >65Hz.
The RED LEDs will gradually spin slower as the battery
charges.
Error LED
Solid Red
Standby
Solid Orange
Reverse polarity. Reverse
the battery connections.
Battery voltage is too low
for charger to detect. Verify
connection and mode
selection, if still not working
use Supply Mode to raise
battery voltage.
101010
Memory
Returns to last selected mode when
restarted
Interactive
Alters the charging process based on
organic battery feedback
Recovery
Applies a high-voltage pulse charge when
low-voltage, sulfation or lost capacity is
detected
Safe
Protects against reverse polarity, sparks,
overcharging, overcurrent, open-circuits,
short-circuits and overheating
Fast
Charges two times faster than traditional
battery chargers
Compensation
Adjusts for varying A/C line voltage for
consistent charging
Rugged
Dirt, water, UV, impact and crush resistant
Compact
High-frequency energy conversion for
ultra-compact, lightweight and portable
charger
Start-Stop
Counteracts increased cyclic energy
demands placed on batteries in microhybrid vehicles
Firewall
Multi-level safety barrier that prevents
abnormal and unsafe conditions
Optimization
Stabilizes internal battery chemistry for
increased performance and longevity
Maintenance Plus
Keeps the battery fully charged without
overcharging allowing the charger to be
safely connected indefinitely
Energy Save
Minimizes energy consumption when full
power is not needed
Load Tracking
Charge LEDs dynamically track the
batteries state-of-charge when a load
outpaces the charge current
Diagnostics
Intuitive visual diagnostic tool for detecting
reverse polarity, low-voltage or damaged
batteries
Thermal Monitor
Internal temperature sensors adjust charge
based on ambient climate
Opportunity Charging
Designed to rapidly charge batteries in
applications where charging is intermittent
between use
121212
Charging Steps.
Step 1 & 2: Analyze & Diagnose
Checks the battery’s initial condition, including voltage,
state-of-charge and health, to determine if the battery is
stable before charging.
Step 3: Recovery
Initializes the Recovery desulfation process (if needed) for
deeply discharged or sulfated batteries by pulsing small
amounts of current.
Step 4: Initialize
Starts the charging process with a gentle (soft) charge.
Step 5 & 6: Opportunity & Bulk
Begins with opportunity charging at a high current, then
steps down to the Bulk charging process based on the
condition of the battery and returns 80% of the battery’s
capacity.
Step 7: Absorption
Brings the charge level to 90% by delivering small
amounts of current to provide a safe, efficient charge.
This limits battery gassing and is essential to prolonging
battery life.
Step 8: Optimization
Finalizes the charging process and brings the battery to
maximum capacity. In this step, the charger utilizes multilayered charging profiles to fully recapture capacity and
optimize the specific gravity of the battery for increased
run time and performance. The charger will switch to
Maintenance if the battery tells the charger that more
current is needed.
Step 9: Maintenance
Continuously monitors the battery to determine when
a maintenance charge should be initiated. If the battery
voltage falls below its target threshold, the charger will
restart the Maintenance cycle until voltage reaches its
optimal state and then discontinues the charge cycle.
The cycle between Optimization and Maintenance is
repeated indefinitely to keep the battery at full charge.
The battery charger can be safely left connected
indefinitely without the risk of overcharging.
Technical Specifications.
Input Voltage AC:
Working Voltage AC:
Efficiency:
Back Current Drain:
Operating Temperature:
Storage Temperature:
Charger Type:
Battery Chemistries:
Battery Capacity:
Housing Protection:
Power Factor Full Load:
Max. AC Current Full Load:
Dimensions:
Power:
Cooling:
Weight:
110-240 VAC, 50-60Hz
85-240 VAC, 50-60Hz
90% Approx.
960W Max
<5mA
-20°C to +50°C
-40°C to +70°C
9 Step, Smart Charger
Wet, Gel, MF, CA, EFB,
AGM & LIB
55-425Ah, Maintains
All Battery Sizes
IP66
Natural Convection
>0.96
12A @ 105VAC
30.4 x 21.6 x 10.3 cm
6kg (13.2lbs)
141414
1.800.456.6626
support@no.co
30339 Diamond Parkway, #102
Glenwillow, OH 44139
United States of America
no.co
GXS021716A
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