NPower XPR Series User manual

7-Stage Automatic
Smart Charger
OWNER’S MANUAL
Model number-28507
Important
For safe and optimum performance, charger must be used
properly. Carefully read and follow all instructions and
guidelines in this manual and give special attention to the
CAUTION and WARNING statements.
Please keep this manual for future reference.

1
TABLE OF CONTENTS
INTRODUCTION...........................................................................
PERSONAL SAFETY PRECAUTIONS
AC ELECTRICAL CONNECTIONS
PLUGGING IT IN
USING AN EXTENSION CORD
PREPARING TO CHARGE
CHARGER LOCATION........................................................
BATTERY PREPARATION
CHARGING A BATTERY INSTALLED IN VEHCILE
CHARGING A BATTERY REMOVED FROM VEHCILE......
...........
CHARGER CONTROLS
..............................................................
BATTERY CHARGING TIMES
MAINTENANCE AND CARE
TROUBLE SHOOTING................................................................
SPECIFICATION..........................................................................
WARRANTY.................................................................................
2
IMPORTANT SAFETY INSTRUCTIONS......................................
........................................
..........................................
..................................................
..............................................
..........................................................
.................................................................
4
6
7
7
7
8
8
8
9
11
CHARGING FEATURES ....................................................
....................................................
.......................................................
14
12
20
21
22
23
24

INTRODUCTION
Thank you for purchasing 7-Stage Automatic
Smart Charger. This innovative c harger will keep your AGM
12V batteries charged while maintaining top performance.
This unit was specially designed to charge and maintain your
batteries without having to disconnect them from your boat or
vehicle.
With built in safety features such as a reverse polarity alert,
easy to read LED indicators, automatic short circuit protection,
over temperature protection, and our 7-stage high-efficiency
charging process, you can be assured that your battery will
be charged safely and efficiently.
This manual will explain how to use the charger safely and
effectively. Please read and follow these instructions and
precautions carefully.
7-Stage battery charging
2
Desulfation Soft Start Bulk Charge Absorption Battery Test Recondition Float
CURRENT VOLTAGE

Stage One - Desulfation :
Pulse charges the battery to break down the build up of lead
sulfate crystals. Lead sulfate crystals can occur when a battery
has been discharged or left unused for a period of time, seriously
afffecting the performance and lifetime of the battery.
Stage Two - Soft Start:
A slow steady build up of the charging process that limits the
power supplied to protect the battery.
Stage Three - Bulk Charge :
The main part of the charge process where 80% of the charge is
applied It automatically “tops off” battery as needed, to keep
battery fully charged.
Stage Four - Absorption :
Fully charges the battery by slowly reducing the charge rate
to allow the battery to absorb more power.
Stage Five - Battery Test
:
An automatic test to determine the battery condition after
charging. If future charging required the Recondition stage is
selected. If fully charged the battery goes into Float status.
3

Stage Six - Recondition :
An additional charge stage to recover deeply discharged batteries.
Stage Seven - Float:
Maintains the battery at 100% charge without overcharging or
damaging the battery, allowing the unit to be left connected
to the battery indefinitely. Ideal for batteries used intermittently
such as seasonally used vehicles including classic car,
motorcycles and RVs.
IMPORTANT SAFETY INSTRUCTIONS
WARNING – RISK OF EXPLOSIVE GASES
WORKING IN THE VICINITY OF A LEAD-ACID BATTERY IS
DANGEROUS. BATTERIES GENERATE EXPLOSIVE GASES
DURING NORMAL BATTERY OPERATION. FOR THIS
REASON IT IS OF THE UTMOST IMPORTANCE THAT EACH
TIME BEFORE USING YOUR CHARGER, YOU READ AND
FOLLOW THE INSTRUCTIONS PROVIDED EXACTLY AS
STATED.
4
TO REDUCE RISK OF BATTERY EXPLOSION, FOLLOW
THESE INSTRUCTIONS AND THOSE PUBLISHED BY THE
BATTERY MANUFACTURER.
WARNING: Handling the cord on this product or
objects associated with the use of this product may expose
you to lead. Wash hands after handling.

Read all instructions and cautions printed on the battery
charger, battery and vehicle or equipment using battery.
Use the charger for charging lead-acid batteries only such
as those used in cars, trucks, motorcycles, boats, etc. It is
not intended to supply power to a low-voltage electrical
system or to charge dry-cell batteries commonly used in
household appliances such as radios, toys, camera, etc.
Charging dry-cell batteries may cause them to burst and
cause injury to persons and damage to property.
Use of an attachment not recommended by the battery
charger manufacturer may result in the risk of fire or
electrical shock.
Do not disassemble charger. Take it to a qualified service
professional if service or repair is required. Incorrect
assembly may result in fire or electrical shock.
To reduce risk of electrical shock, unplug the charger from
the outlet before attempting any maintenance or cleaning.
Do not expose charger to rain or snow.
Never charge a frozen battery. If battery acid becomes
frozen, bring battery to a warm area and allow it to thaw
before you begin charging.
Never touch the battery clamps together when the charger
is on. This may cause a spark.
5
Never operate a charger if it has received a hard blow,
been dropped or otherwise damaged. Take it to a qualified
professional for inspection.
Never pull out the plug by the cord when unplugging the
charger as this may cause damage to the cord or plug.

6
PERSONAL SAFETY PRECAUTIONS
Make sure that someone is within range of your voice to
come to your aid if needed while you work with or are near
a lead-acid battery.
Wear complete eye and clothing protection when working
with lead-acid batteries.
Avoid touching your eyes while working with a battery.
Have plenty of fresh water and soap nearby for use in case
battery acid contacts your eyes, skin or clothing. If this
happens, wash immediately with soap and water then get
medical attention.
Never smoke or allow an open spark or flame in the vicinity
of the battery or engine. Batteries generate explosive
gases.
Take care not to drop any metal tool or object onto the
battery. This may result in a spark or short circuit across
the battery or another electrical device that may cause an
explosion.
Remove all personal metal items, such as rings, bracelets,
necklaces and watches from your body while working with a
lead-acid battery. A battery can produce a short circuit
current high enough to weld such objects to metal, causing
a severe burn.
Never attempt to charge a frozen battery.
Never overcharge a battery.
Always operate the battery charger in an open, well-
ventilated area.

AC ELECTRICAL CONNECTIONS
PLUGGING IT IN
According to local codes and ordinances, your charger requires
the use of 120 Volt AC electrical wall outlet receptacles.
WARNING: Never alter AC cord or plug provided. If it
does not fit the outlet, have a proper outlet installed by a
qualified electrician. Improper connection can result in a
risk of fire or electric shock.
WARNING: Do not operate the charger if it has a
damaged power cord or plug. Have the cord replaced.
USING AN EXTENSION CORD
The use of an extension cord is not recommended. If an
extension cord must be used, follow these guidelines:
Make sure that the pins on the charger’s power cord fit
firmly into the extension cord and that the extension cord
fits firmly into the receptacle.
7
Check that the extension cord is properly wired and in good
electrical condition.
Make sure that the wire size is large enough for its length
and for the AC ampere rating of the charger, as specified in
the chart below.
MINIMUM RECOMMENDED EXTENSION CORD
Length of Cord, Metres
(Feet)
7.6
(25)
15.2
(50)
30.5
(100)
45.6
(150)
AWG* Size of Cord 18 16 12 10
*AWG=American Wire Gauge

WARNING: Use of an improper extension cord could
result in a risk of fire and electric shock.
PREPARING TO CHARGE
CHARGER LOCATION
Do not expose charger to extreme weather and
temperatures. Keep away from moist and wet areas.
Place the charger as far from the battery being charged as
the cables will permit.
Be sure to position the power cord to prevent it from being
stepped on, tripped over or damaged.
Never place charger directly above battery being charged.
Gases from the battery will corrode and damage the
charger.
Never set a battery on top of a charger.
Never allow battery acid to drip on charger.
8
Always charge a battery in a well-ventilated area.
WARNING: Battery chargers may get hot during
operation. Do not set charger on flammable materials such
as carpeting, upholstery, paper, cardboard, etc. Charger
may damage leather, plastic and rubber.
BATTERY PREPARATION
If it is necessary to remove battery from vehicle to charge it,
always remove grounded terminal from battery first. Make
sure all accessories in the vehicle are OFF in order to

prevent sparks.
Be sure that the area around the battery is well ventilated
while being charged.
Clean the battery terminals. Be careful to keep corrosion or
battery acid from getting in or around your eyes.
For batteries with removable vent caps, if required, add
distilled water to each cell until the battery fluid reaches the
level specified by the battery manufacturer. Do not overfill
.
For batteries without removable vent caps, carefully follow
the manufacturer’s charging instructions.
Study all of the battery manufacturer’s specific precautions
and recommendations for charging and for recommended
rates of charge.
Make sure that you have a 12 V lead-acid battery.
Determine voltage of battery by referring to the vehicle
owner’s manual. If the charger has an adjustable charge
rate, charge battery at the lowest rate first.
9
CHARGING A BATTERY INSTALLED IN VEHCILE
NOTE: A marine battery installed in a boat must be removed
and charged on shore. To charge it on board requires
equipment specially designed for marine use.
Connect and disconnect the DC output clamps only after
removing the AC plug from the electrical outlet.
Never allow the DC output clamps to touch each other.
This may cause a spark.

10
FOLLOW THESE STEPS WHEN BATTERY IS INSTALLED IN
VEHICLE. A SPARK NEAR BATTERY MAY CAUSE A
BATTERY EXPLOSION. TO REDUCE THE RISK OF A
SPARK NEAR BATTERY:
1. Position AC and DC cords to reduce the risk of damage
by hood, door, or moving engine part.
2. Stay clear of fan blades, belts, pulleys, and other parts
than can cause injury to persons.
3. Check polarity of battery posts. A positive (POS, P, +)
battery post usually has a larger diameter than a
negative (NEG, N, -) post.
4. Determine which battery post is grounded (connected)
to the chassis. IT IS NORMALLY THE NEGATIVE
POST.
5. Connecting to a negative-grounded system:
Connect the positive (red) clip from a battery charger to
a positive (POS, P, +) ungrounded post of battery.
Connect the negative (black) clip to vehicle chassis or
engine block away from battery. Do not connect clip to
carburetor, fuel lines, or sheet-metal body parts.
Connect to a heavy gauge metal part of the frame or
engine block.
Connecting to a positive-grounded system: Connect
the negative (black) clip from battery charger to
negative (NEG, N, -) ungrounded post of battery.
Connect the positive (red) clip to vehicle chassis or
engine block away from battery. Do not connect clip to
carburetor, fuel lines, or sheet-metal body parts.
Connect to a heavy gauge metal part of the frame or
engine block.

11
6. Connect charger AC supply cord to electric outlet.
7. Charge battery as outlined in OPERATION
INSTRUCTIONS section.
8. When disconnecting charger, disconnect AC cord,
remove clip from vehicle chassis, and then remove clip
from battery terminal.
CHARGING A BATTERY REMOVED FROM VEHCILE
Connect and disconnect the DC output clamps only after
removing the AC plug from the electrical outlet.
Never allow the DC output clamps to touch each other.
This may cause a spark.
FOLLOW THESE STEPS WHEN BATTERY IS REMOVED
FROM VEHICLE. A SPARK NEAR BATTERY MAY CAUSE
A BATTERY EXPLOSION. TO REDUCE THE RISK OF A
SPARK NEAR BATTERY:
1. Check polarity of battery posts. A positive (POS, P, +)
battery post usually has a larger diameter than a
negative (NEG, N, -) post.
2. Attach at least a 60cm 6-guage (AWG) insulated battery
cable to a negative (NEG, N, -) battery post.
3. Connect the positive (red) charger clip to the positive
(POS, P, +) post of battery.
4. Position yourself and the free end of cable as far away
from battery as possible, and then connect the negative
(black) charger clip to the free end of cable.

12
5. Do not face battery when making final connection.
6. Connect charger AC supply cord to electric outlet.
7. Charge battery as outlined in OPERATING
INSTRUCTIONS section.
8. When disconnecting chargers, always do so in reverse
sequence of connecting procedure and break first
connection while standing as far away from battery as
practical.
CHARGER CONTROLS
DIGITAL DISPLAY MODE SELECTION
Press the Display Mode button to toggle digital display content
as follows:
Current – When selected, charging current (A) will be
displayed.
Voltage – When selected, charging voltage (V) will be
displayed. The voltage displayed is the charging voltage
and usually will be higher than the battery’s resting voltage.
Battery Capacity % - When selected, approximate
percentage of battery charge will be displayed.
oAt less than 50% battery capacity, the display will
read “LO”
oThe display will increase in 10% increments
between 50% to 90% capacity. Such as “80”.
oAt full charge, the display will read will read “FUL”

13
CHARGE RATE SELECTION
Press the Charge Rate button to select desired charge rate as
follows:
Optimal Automatic Charge – To help extend the life of your
battery and ensure it is delivering its maximum potential, it
is important to charge the battery at a rate that is
appropriate and safe for its capacity. Charging a battery at
too high a charge rate, while fast, may shorten the expected
life of a battery. Charging a battery at too low a charge rate,
while safer, takes longer and does not ensure the battery
will reach 100% of its capacity. Optimal Charge logic
automatically selects the ideal charge rate for your battery.
In Optimal Charge mode, the charger starts charging at a
low, safe current. Gradually, the charger increases current
as the battery demonstrates it can accept a higher current.
The result is a battery safely charged to its utmost capacity.
20 A or 40A Charge Rate – Use for faster charging of
small-to-large capacity automotive, marine, deep cycle and
farm tractor batteries.
10A Charge Rate- Use for slow charging small-to-large
capacity automotive, marine, deep cycle and farm tractor
batteries. Also for garden tractor batteries.
Maintainer mode - use for maintain the battery with
large capacity.

charging is complete, the Charge Status LED will stop blinking
and the digital display will read “FUL”.
COMPLETION OF CHARGING
Charge completion is indicated when the Charge Status LED
stops blinking and illuminates continuously (green). The digital
display will also show a “FUL” message. The charger has
stopped charging and switched to Maintenance mode.
MAINTENANCE MODE
Once charging is complete, the charger will automatically go
into Maintenance mode (also known as float mode monitoring).
In this mode, the charger keeps the battery fully charged by
delivering a small amount of current, when necessary, to keep
the battery at peak charge. This process will keep for around 1
hour, and after that, the digital display will show you “FUL”, and
CHARGER FEATURES
CONNECTION METHOD
This charger comes with 6ft. heavy-duty, 8-ga booster cables.
CHARGE STATUS INDICATOR
A blinking green on the 7-stage LED indicates that the battery is
being charged at specific stage. Please refer to the sticker on
the top of the unit for more detail information.
AUTOMATIC SHUT OFF
The battery charger is designed to automatically shut off once
battery charging is complete to prevent overcharging. When
14

15
the DC clamps will automatically out of power.
REVERSE POLARITY PROTECTION
If the cables are incorrectly connected to the battery, the
Reverse Polarity indicator will illuminate. Note: the charger
will not begin charging if the Reverse Polarity indicator is lit.
BATTERY REPAIRING MODE
If a battery is left discharged for an extended period of time,
it could become sulphated, unable to accept a charge.
Repairing Mode may help revers e the effects of sulphating
and restore a batteries ability to accept a charge. If the charger
detects a sulphated battery, it will automatically activate Battery
Repairing mode, indicated by a blinking yellow LED. And
the digital display will show you”-“in turns. If successful, normal
recharging will resume after the battery is desulphated. If the
first attempt at desulphation is unsuccessful, the battery
charger will make up to four more attempts. If still unsuccessful
at desulphating the battery, fault code “F01” will be displayed
indicating the battery will not accept a charge and should be
replaced.
ABORTED CHARGES
If charging can’t be completed normally, charging will be
aborted. The digital display may show a fault code. To reset
the charger after an aborted char ge, disconnect the battery or
unplug the charger.
BATTERY DIAGNOTICS

16
The charger continuously monitors battery condition and may
report certain charging failures as fault codes. Refer to the
section called “FAULT CODES” for a complete list.
COOLING FAN OPERATION
The charger is designed to control its high speed cooling fan for
efficient operation. Consequently, it is normal for the fan to
start and stop during charging.
OVERHEAT PROTECTION
The charger is designed to shut itself off if overheating is
detected. Once the charger cools down, it will resume charging
automatically.
Features:

Front panel view
17
8. Battery Repairing Indicator-- It is a yellow LED, when the
battery is repairing this LED flash.
The charger will estimate automatically whether the battery
repairing is needed. It will repair the battery only when
the battery has gone into float charge and the voltage is lower
than 13V. The process cycles every 4±0.5h until the voltage is
higher than 13V. If it cycles 5 times and the voltage is still lower
than 13V, there will be a code “F01” present on the display
panel, indicating error. Please replace the battery.
1. Desulfation LED --When green light flashing, it indicates the
unit is in Desulfation stage.
2. Soft Start LED --When green light flashing, it indicates the
unit is in Soft Start stage.
3. Bulk Charge LED --When green light flashing, it indicates the
unit is in Bulk Charge stage.
4. AbsorptionLED --When green light flashing, it indicates the
unit is in Absorption stage.
5. Battery Test LED --When green light flashing, it indicates the
unit is in Battery Test stage.
6. Recondition LED --When green light flashing, it indicates the
unit is in Recondition stage.
7. Float LED --When green light flashing, it indicates the
unit is in Float stage.

9. Display Panel—It can indicate present voltage, present
current, present battery capacity or wrong condition code.
With AC power input, when not connected to the battery, the
charger shows that there is no power output with the display
panel present moving “8”. After connected to the battery, the
panel will display the battery information according to what you
choose. If the battery voltage is higher than 13.6±0.2V, the
panel will displays “FUL”.
When error occurs, the panel displays error code.
The meanings of the codes and the solutions are enumerated
in the troubleshooting table.
11. Current Indicator--It is a green LED indicator. When the
display panel indicates the present current, this LED indicator
illuminates.
12. Voltage Indicator--It is a green LED indicator. When the
display panel indicates the present voltage, the voltage LED
indicator illuminates.
13. Battery level indicator--When the display panel indicates
the battery level, this LED indicator will illuminate.
18
10. Reverse Polarity LED --It is a red LED. when clips connected
the battery in the wrong way, this red LED illuminates.

Code Condition
LO low Battery
60~90 Current battery level
FUL Full Battery
15. Automatic charging indicator-it indicates the charging rate
you choose is automatic.
16. Maintenance current indicator –It indicates the charging rate
you choose is maintenance .
17. 10A current indicator--It indicates the charging rate you
choose is 10A.
19
14. Display Button Switch--You can choose what to display on
the panel by pressing the button. The default display is the
current charging rate.
18. 20A current indicator--It indicates the charging rate you
choose is 20A.
20. Charging rates selecting switch--You can choose the charge
rates-10A, 20A or 40A by pressing this switch.
19. 40A current indicator-- It indicates the charging rate you
choose is 40A.