Sterling Power Products Aqua nautic User manual

Waterproof IP 68
Power Factor Corrected
20 amp Battery Charger-
One, Two & Three Bank Models
English
Deutsch
RoHS
compliant
www.sterling-power.com
www.sterling-power-usa.com
technology
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Digital
Global Operation

2 3
.
Thank you from all of us at Sterling Power Products and congratulations on your recent purchase of the
Aqua nautic On-board Marine Battery Charger.
For many years, Sterling Power Products has been a leading designer and manufacturer of marine battery chargers. We
have expanded our offering to include our latest line of ProSport chargers. Designed for the sport fisherman and
recreational boater, the ProSport series offers many features not seen in competitive chargers.
Please save an read this manual carefully and fully understand the safety instructions before installing your new Sterling
ProSport battery charger.
Before connecting your batteries or AC power, read all instructinos and cautionary markings on the battery charger and
batteries.
Use of attachments not recommended or sold by Sterling Power Products may result in a risk of fire, electrical shock or
personal injury.
Do not operate the charger if it has received a sharp blow, direct hit of force, has been dropped or otherwise damaged in
any way.
Do not disassemble the charger. Call the factory directly when service or repair is required. Incorrect assembly may result in
risk of electrical shock or fire.
To reduce the risk of electrical shock, remove AC power from the charger prior to any maintenance or cleaning.
To reduce the risk of battey explosion, follow these instructions and those published by the battery manufacturer, and of any
equipment you intend to use in the vicinity of a battery. Review all cautionary markings and labels.
Someone should be within the range of your voice or close enough to come to your aid when working near a lead-acid
battery.
Have plenty of water and soap nearby in case battery acid comes in contact with skin, clothes or eyes.
Introduction
General Safety Instructions
Personal Safety Precautions
CAUTION: To reduce the risk of injury, charge only lead-acid type rechargable batteries (open lead-acid, sealed lead-
acid, gel cell and AGM). Other types of batteries may burst, causing personal injury. The ProSport is factory set for
lead-acid batteries.
WARNING: RISK OF EXPLOSIVE GASES
Working in the vicinity of a lead-acid battery is dangerous. Batteries generate explosive gases during normal battery
operation.
Wear complete eye protection and clothing protection. Avoid touching eyes while working with a battery.
If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters the eye(s), flood eye(s) with
running cold water for at least 10 minutes and get medical attention immediately.
Never smoke or allow a spark or a flame in the vicinity of a battery or engine.
Be extra cautious to reduce the risk of dropping a metal tool onto a battery. It may spark or short-circuit the battery or other
electrical parts that may cause explosion.
Remove all personal metal items such as rings, bracelets, necklaces, watches, and jewellery when working near a battery. A
battery can produce a short circuit high enough to weld a ring or any metal, causing serious burns.
Use the unit for charging lead-acid batteries only. . Do not use the battery charger to charge dry cell batteries that are
commonly used with home appliances. These batteries may burst and cause injury to persons and property.
If necessary to remove a battery from a boat to charge, always remove the grounded terminal from battery first. Make sure
all accessories in the boat are off, as to not cause an arc.
Be sure the area around the charger and the batteries is well ventilated while the batteries are being charged. Gases can
be forcefully blown away using a piece of cardboard or other nometallic material as a fan.
Clean battery terminals with full eye protection to prevent corrosion from coming in contact with eyes.
Add distilled water in each cell until electrolyte reaches levels specified by the battery manufacturer. This helps purge
excessive gases from cells. Do not overfill. For batteries without caps, carefully follow the manufacturer’s recharging
instructions.
Study all manufacturer’s specific precautions, such as removing or not removing cell caps while charging, in addition to
rates of charge.
Extension cords should be industrial grade / heavy duty and grounded. Check extension cord before use for damage, bent
prongs and cuts. Replace if damaged.
Never charge a frozen battery.
Always make your extension cord connection on the charger side first. After connecting the extension cord to the charger
proceed to plug the extension cord to a nearby AC RCD-protected (ground fault circuit protected) outlet.
Always remove the extension cord from the AC outlet first when charging is completed, followd by unplugging the charger.
Thet charger is a fully automatic, electronic multi-stage on-board marine battery charger. It is prewired for easy installation
and is 100% waterproof for fresh and salt water applications.
The ProSport incorporates an extruded aluminium housing with plastic end caps. This design offers improved durability and
heat transfer while comparing it to full plastic case competitive products. The ProSport offers multi-stage charging which
includes a “float” maintenance mode that is safe for long and short term storage. ProSport can be left on indefinitely without
harming or overcharging your batteries.
TM
The DISTRIBUTED-ON-DEMAND multi-stage charging technology will automatically sense and distribute 100% of the
available charging amp output, i.e. 8, 12 or 20 amps (model specific) to any one bank or combination of all banks. Each
battery bank output is fully isolated.
Easy to view LED indicators will provide you with AC power on and charging status. The LED indicators can be seen from
the front and the side of the charger when installed.
The charger is available in different models and can be used in 12, 24 and 36 volt configurations (model specific) without
rewiring or switching. Just attach the DC output cable terminals as illustrated in the installation section of this manual.
With your Charger plugged in properly, it will automatically and fully charge your batteries while it conditions and extends
the life of your batteries. When you are not at the boat you can leave your charger plugged in to reduce sulfate buildup
allowing your batteries to be fully charged and maintained until your next boat trip.
Never charge a frozen battery.
Safety Precautions Prior to Charging Batteries
General Overview
Table Of Contents
Safety Instructions... pages 2-3
Overview... pages 3-4
Installation Guidelines... pages 4-7
Charging Your Batteries... page 8
Maintenance... page 9
Trouble Shooting... pages 10
Customer Service & Warranty... page11

2 3
.
Thank you from all of us at Sterling Power Products and congratulations on your recent purchase of the
Aqua nautic On-board Marine Battery Charger.
For many years, Sterling Power Products has been a leading designer and manufacturer of marine battery chargers. We
have expanded our offering to include our latest line of ProSport chargers. Designed for the sport fisherman and
recreational boater, the ProSport series offers many features not seen in competitive chargers.
Please save an read this manual carefully and fully understand the safety instructions before installing your new Sterling
ProSport battery charger.
Before connecting your batteries or AC power, read all instructinos and cautionary markings on the battery charger and
batteries.
Use of attachments not recommended or sold by Sterling Power Products may result in a risk of fire, electrical shock or
personal injury.
Do not operate the charger if it has received a sharp blow, direct hit of force, has been dropped or otherwise damaged in
any way.
Do not disassemble the charger. Call the factory directly when service or repair is required. Incorrect assembly may result in
risk of electrical shock or fire.
To reduce the risk of electrical shock, remove AC power from the charger prior to any maintenance or cleaning.
To reduce the risk of battey explosion, follow these instructions and those published by the battery manufacturer, and of any
equipment you intend to use in the vicinity of a battery. Review all cautionary markings and labels.
Someone should be within the range of your voice or close enough to come to your aid when working near a lead-acid
battery.
Have plenty of water and soap nearby in case battery acid comes in contact with skin, clothes or eyes.
Introduction
General Safety Instructions
Personal Safety Precautions
CAUTION: To reduce the risk of injury, charge only lead-acid type rechargable batteries (open lead-acid, sealed lead-
acid, gel cell and AGM). Other types of batteries may burst, causing personal injury. The ProSport is factory set for
lead-acid batteries.
WARNING: RISK OF EXPLOSIVE GASES
Working in the vicinity of a lead-acid battery is dangerous. Batteries generate explosive gases during normal battery
operation.
Wear complete eye protection and clothing protection. Avoid touching eyes while working with a battery.
If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters the eye(s), flood eye(s) with
running cold water for at least 10 minutes and get medical attention immediately.
Never smoke or allow a spark or a flame in the vicinity of a battery or engine.
Be extra cautious to reduce the risk of dropping a metal tool onto a battery. It may spark or short-circuit the battery or other
electrical parts that may cause explosion.
Remove all personal metal items such as rings, bracelets, necklaces, watches, and jewellery when working near a battery. A
battery can produce a short circuit high enough to weld a ring or any metal, causing serious burns.
Use the unit for charging lead-acid batteries only. . Do not use the battery charger to charge dry cell batteries that are
commonly used with home appliances. These batteries may burst and cause injury to persons and property.
If necessary to remove a battery from a boat to charge, always remove the grounded terminal from battery first. Make sure
all accessories in the boat are off, as to not cause an arc.
Be sure the area around the charger and the batteries is well ventilated while the batteries are being charged. Gases can
be forcefully blown away using a piece of cardboard or other nometallic material as a fan.
Clean battery terminals with full eye protection to prevent corrosion from coming in contact with eyes.
Add distilled water in each cell until electrolyte reaches levels specified by the battery manufacturer. This helps purge
excessive gases from cells. Do not overfill. For batteries without caps, carefully follow the manufacturer’s recharging
instructions.
Study all manufacturer’s specific precautions, such as removing or not removing cell caps while charging, in addition to
rates of charge.
Extension cords should be industrial grade / heavy duty and grounded. Check extension cord before use for damage, bent
prongs and cuts. Replace if damaged.
Never charge a frozen battery.
Always make your extension cord connection on the charger side first. After connecting the extension cord to the charger
proceed to plug the extension cord to a nearby AC RCD-protected (ground fault circuit protected) outlet.
Always remove the extension cord from the AC outlet first when charging is completed, followd by unplugging the charger.
Thet charger is a fully automatic, electronic multi-stage on-board marine battery charger. It is prewired for easy installation
and is 100% waterproof for fresh and salt water applications.
The ProSport incorporates an extruded aluminium housing with plastic end caps. This design offers improved durability and
heat transfer while comparing it to full plastic case competitive products. The ProSport offers multi-stage charging which
includes a “float” maintenance mode that is safe for long and short term storage. ProSport can be left on indefinitely without
harming or overcharging your batteries.
TM
The DISTRIBUTED-ON-DEMAND multi-stage charging technology will automatically sense and distribute 100% of the
available charging amp output, i.e. 8, 12 or 20 amps (model specific) to any one bank or combination of all banks. Each
battery bank output is fully isolated.
Easy to view LED indicators will provide you with AC power on and charging status. The LED indicators can be seen from
the front and the side of the charger when installed.
The charger is available in different models and can be used in 12, 24 and 36 volt configurations (model specific) without
rewiring or switching. Just attach the DC output cable terminals as illustrated in the installation section of this manual.
With your Charger plugged in properly, it will automatically and fully charge your batteries while it conditions and extends
the life of your batteries. When you are not at the boat you can leave your charger plugged in to reduce sulfate buildup
allowing your batteries to be fully charged and maintained until your next boat trip.
Never charge a frozen battery.
Safety Precautions Prior to Charging Batteries
General Overview
Table Of Contents
Safety Instructions... pages 2-3
Overview... pages 3-4
Installation Guidelines... pages 4-7
Charging Your Batteries... page 8
Maintenance... page 9
Trouble Shooting... pages 10
Customer Service & Warranty... page11

4
Installation
All battery chargers are designed to be permanently mounted on-board and can be mounted with the extruded fins placed
vertically or horizontally. Always mount your charger in a compartment area that can be properly ventilated during use.
Do not mix battery types on-board. All batteries should be of the same age and in good operating condition.
Do not make any electrical connections to the ProSport or to the batteries until the following steps are completed:
11 Easy-to-follow Installation Steps:
1. Select a mounting location that allows for free air ventilation with a minimum of 8 inches of clear, unobstructed space
around and in front of the charger. Open all battery and engine compartments and ventilate for at least 15 minutes before
starting the installation of the charger.
2. Confirm the selected mounting location allows for a minimum of 8 inches of free space around the front and the sides of
the charger. Do not install the charger on carpeted, upholstered, vinyl or varnished surfaces. Be sure to place the charger in
an accessible area where all indicators are viewable. Confirm all battery cables can reach each of the batteries.
3. Using the charger as a template use a small awl or screwdriver to mark the position of each mounting hole.
4. Using a 1/8” drill bit, drill pilot holes in the four marked locations as described in step 3. Apply a silicon sealer in each of
the mounting locations to waterproof the screw holes.
5. Position the charger over the mounting holes and secure with a power screwdriver by installing 4 marine grade or
stainless steel screws (mounting screws not included).
6. Prepare each battery in advance by cleaning each terminal post with a wire brush until a shiny surface is obtained.
7. Run your cables free from sharp objects and hold each of them in place with cable ties. Coil excess cable, do not cut or
shorten the length of the cables as there are in-line fuses located 4 inches from the end of each positive(red) cable. These
fuses are in place to protect the charger and output cables in the event of a short or reverse polarity..
8. Connect the DC output cables as illustrated. Make sure the negative (black or yellow) wires are connected as illustrated
to the negative side of the battery and the positive (red) wires are connected to the positive side of the battery.
9. Make sure all DC connections are tight and correct.
10. Locate the AC power cord in an open-air area of your boat at least 21 inches from the charger, batteries and fuel fill
lines.
11. Connect a heavy duty extension cord to the charger first. After connecting the extension cord to the charger proceed to
plug the extension cord to a nearby RCD-protected (ground fault circuit interrupt) outlet. Always remove the extension cord
from the AC outlet first when charging is completed, followed by unplugging the charger.
You are now connected and charging your batteries. View the LED indicators. Assuming your batteries are discharged you
should observe both the green “Power On” LED and the red “Charging” LED on, indicating charging mode is in process.
IMPORTANT NOTICE:
As you prepare to attach the positive (red) and negative (yellow or black wires) to the batteries there will be a brief low
power spark that is generated as you make the connection. This is due to the high frequency capacitors taking a charger.
Make sure the black (or yellow) wires are connected as illustrated to the negative side of the battery and the red wires are
connected to the positive side of the battery.
1/8" pilot hole
with silicon sealer
IMPORTANT NOTICE:
Confirm the surface you will be mounting the
charger to is adequate in strength and
thickness to hold the unit in place with the
mounting screws you have selected. +_+_
AC Input
Output No. 1
Output No. 2
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
12 v 12 v
24 v
24 v+
+_
AC Input
Output No. 1
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
single battery bank model
wired to charge
1 battery bank
12 v
Engine Start Battery
or Domestic Battery 2
Domestic
Battery 1
+_+_
AC Input
Output No. 1
Output No. 2
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green) 2 battery bank model
wired to charge 2 separate
battery banks as 2 x 12 v
isolated, or
can be joined together
to charge one battery
12 v 12 v
2 battery bank model
wired to charge 1
battery banks 24 v
mad up by 2 x 12 v
connected in series
Wiring Diagrams
If only two batteries are used with a 3-bank charger, then connect the unused output cable to either one of
the two batteries, as instructed in item 8 above.
Always connect each charger output to a single 12V battery even if the batteries are wired in series for 24V
or 36V.
link
5
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side

4
Installation
All battery chargers are designed to be permanently mounted on-board and can be mounted with the extruded fins placed
vertically or horizontally. Always mount your charger in a compartment area that can be properly ventilated during use.
Do not mix battery types on-board. All batteries should be of the same age and in good operating condition.
Do not make any electrical connections to the ProSport or to the batteries until the following steps are completed:
11 Easy-to-follow Installation Steps:
1. Select a mounting location that allows for free air ventilation with a minimum of 8 inches of clear, unobstructed space
around and in front of the charger. Open all battery and engine compartments and ventilate for at least 15 minutes before
starting the installation of the charger.
2. Confirm the selected mounting location allows for a minimum of 8 inches of free space around the front and the sides of
the charger. Do not install the charger on carpeted, upholstered, vinyl or varnished surfaces. Be sure to place the charger in
an accessible area where all indicators are viewable. Confirm all battery cables can reach each of the batteries.
3. Using the charger as a template use a small awl or screwdriver to mark the position of each mounting hole.
4. Using a 1/8” drill bit, drill pilot holes in the four marked locations as described in step 3. Apply a silicon sealer in each of
the mounting locations to waterproof the screw holes.
5. Position the charger over the mounting holes and secure with a power screwdriver by installing 4 marine grade or
stainless steel screws (mounting screws not included).
6. Prepare each battery in advance by cleaning each terminal post with a wire brush until a shiny surface is obtained.
7. Run your cables free from sharp objects and hold each of them in place with cable ties. Coil excess cable, do not cut or
shorten the length of the cables as there are in-line fuses located 4 inches from the end of each positive(red) cable. These
fuses are in place to protect the charger and output cables in the event of a short or reverse polarity..
8. Connect the DC output cables as illustrated. Make sure the negative (black or yellow) wires are connected as illustrated
to the negative side of the battery and the positive (red) wires are connected to the positive side of the battery.
9. Make sure all DC connections are tight and correct.
10. Locate the AC power cord in an open-air area of your boat at least 21 inches from the charger, batteries and fuel fill
lines.
11. Connect a heavy duty extension cord to the charger first. After connecting the extension cord to the charger proceed to
plug the extension cord to a nearby RCD-protected (ground fault circuit interrupt) outlet. Always remove the extension cord
from the AC outlet first when charging is completed, followed by unplugging the charger.
You are now connected and charging your batteries. View the LED indicators. Assuming your batteries are discharged you
should observe both the green “Power On” LED and the red “Charging” LED on, indicating charging mode is in process.
IMPORTANT NOTICE:
As you prepare to attach the positive (red) and negative (yellow or black wires) to the batteries there will be a brief low
power spark that is generated as you make the connection. This is due to the high frequency capacitors taking a charger.
Make sure the black (or yellow) wires are connected as illustrated to the negative side of the battery and the red wires are
connected to the positive side of the battery.
1/8" pilot hole
with silicon sealer
IMPORTANT NOTICE:
Confirm the surface you will be mounting the
charger to is adequate in strength and
thickness to hold the unit in place with the
mounting screws you have selected. +_+_
AC Input
Output No. 1
Output No. 2
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
12 v 12 v
24 v
24 v+
+_
AC Input
Output No. 1
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
single battery bank model
wired to charge
1 battery bank
12 v
Engine Start Battery
or Domestic Battery 2
Domestic
Battery 1
+_+_
AC Input
Output No. 1
Output No. 2
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green) 2 battery bank model
wired to charge 2 separate
battery banks as 2 x 12 v
isolated, or
can be joined together
to charge one battery
12 v 12 v
2 battery bank model
wired to charge 1
battery banks 24 v
mad up by 2 x 12 v
connected in series
Wiring Diagrams
If only two batteries are used with a 3-bank charger, then connect the unused output cable to either one of
the two batteries, as instructed in item 8 above.
Always connect each charger output to a single 12V battery even if the batteries are wired in series for 24V
or 36V.
link
5
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side

7
Charging Batteries
The Sterling Aquanautic series is designed to charge, condition and maintain your batteries. Please follow
these steps each time you use your charger.
1. Open all battery compartments and ventilate for at least 15 minutes before applying AC power to your
charger. While charging your batteries make sure to keep your battery compartment open, allowing for free air
ventilation.
2. Make sure all DC battery connections are tight and clean. Follow the battery manufacturer’s
recommendation for battery cell caps. Loosen caps if applicabel.
3. Connect a heavy duty extension cord to the ProSport charger first. After connecting the extension cord to
the charger proceed to plug the extension cord to a nearby RCD-protected AC power outlet.
4. Observe the on-board LED indicators for a solid green and red indication. This will tell you the batteries are
in the charging process.
5. Charge your batteries until only the green LED indicator remains on. This indicates that the charging
process is completed and your batteries are fully charged and are now being maintained in a gentle float /
storage mode. (Recommended while your boat is not in use.) The unit can be left on in this mode indefinitely
and will never overcharge your batteries.
6. When ready to use your boat, unplug the extension cord from the AC power outlet first, followed by
unplugging the charger.
3 battery bank model
wired to charge 3 separate
battery banks as 3 x 12 v
isolated, or
can be joined together
to charge one battery
12 v 12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
Domestic
Battery 1
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Domestic
Battery 2 Engine Start Battery
or Domestic Battery 3
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
3 battery bank model
wired to charge
1 x 36 v battery
bank
12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
36 v
36 v+
12 v
3 battery bank model
wired to charge
1 x 24 v battery
and
1 x 12 v battery bank
12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
24 v
24 v+ 12 v
12 v
link link
link
Battery type selector,
Battery Type Selector
On side of end cap
Charge 14.8 Float 13.5
Charge14.4 Float 13.5
Charge 15.1 Float 13.5
Black: Open lead acid
Gray: Gel / AGM /Sealed
Red: Calcium
Simply unscrew the small plastic plug at the side of
the case and insert one of the other plugs you require
to obtain the correct voltage.
Battery type s change so often and manufacturer s
have a tendency to up there charger voltages so
often that we simply cannot keep up, we have
labelled our charge curves in rough battery type ,
however there are battery types which require
different voltages, for example some AGM companies
are no saying they want 14.8 volts charge for there
batteries, as such go by the voltage setting of the
chargers profiles and forget the battery type s we
recomend, at the end of the day what ever voltage
you battery supplier has asked for the product should
be set by voltage .
6
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side

7
Charging Batteries
The Sterling Aquanautic series is designed to charge, condition and maintain your batteries. Please follow
these steps each time you use your charger.
1. Open all battery compartments and ventilate for at least 15 minutes before applying AC power to your
charger. While charging your batteries make sure to keep your battery compartment open, allowing for free air
ventilation.
2. Make sure all DC battery connections are tight and clean. Follow the battery manufacturer’s
recommendation for battery cell caps. Loosen caps if applicabel.
3. Connect a heavy duty extension cord to the ProSport charger first. After connecting the extension cord to
the charger proceed to plug the extension cord to a nearby RCD-protected AC power outlet.
4. Observe the on-board LED indicators for a solid green and red indication. This will tell you the batteries are
in the charging process.
5. Charge your batteries until only the green LED indicator remains on. This indicates that the charging
process is completed and your batteries are fully charged and are now being maintained in a gentle float /
storage mode. (Recommended while your boat is not in use.) The unit can be left on in this mode indefinitely
and will never overcharge your batteries.
6. When ready to use your boat, unplug the extension cord from the AC power outlet first, followed by
unplugging the charger.
3 battery bank model
wired to charge 3 separate
battery banks as 3 x 12 v
isolated, or
can be joined together
to charge one battery
12 v 12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
Domestic
Battery 1
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Domestic
Battery 2 Engine Start Battery
or Domestic Battery 3
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
3 battery bank model
wired to charge
1 x 36 v battery
bank
12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
36 v
36 v+
12 v
3 battery bank model
wired to charge
1 x 24 v battery
and
1 x 12 v battery bank
12 v 12 v
C h a r g i n g Yo u r B a t t e r i e s
+_+_+_
AC Input
Output No. 1
Output No. 2
Output No. 3
black or yellow
red
black or yellow
red
black or yellow
red
Live (brown or black)
Neutral (blue or white)
Earth (yellow-green)
24 v
24 v+ 12 v
12 v
link link
link
Battery type selector,
Battery Type Selector
On side of end cap
Charge 14.8 Float 13.5
Charge14.4 Float 13.5
Charge 15.1 Float 13.5
Black: Open lead acid
Gray: Gel / AGM /Sealed
Red: Calcium
Simply unscrew the small plastic plug at the side of
the case and insert one of the other plugs you require
to obtain the correct voltage.
Battery type s change so often and manufacturer s
have a tendency to up there charger voltages so
often that we simply cannot keep up, we have
labelled our charge curves in rough battery type ,
however there are battery types which require
different voltages, for example some AGM companies
are no saying they want 14.8 volts charge for there
batteries, as such go by the voltage setting of the
chargers profiles and forget the battery type s we
recomend, at the end of the day what ever voltage
you battery supplier has asked for the product should
be set by voltage .
6
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side
10 amp fuse required
on a/c side

9
Owner's Periodic Maintenance Guide
Item: Battery Connections
Process: Clean and tighten all battery connections. Follow battery manufacturer’s instructions
for cleaning a battery. Clean all battery terminals with a wire brush where required
and tighten all battery connections.
When: Monthly
Item: Battery Electrolyte
Process: Per battery manufacturer’s instructions monitor and maintain proper levels of
distilled water in each battery.
When: Monthly
Item: DC Output Wiring
Process: Visually inspect all wiring for cuts and abrasions.contact Sterling Power Products if
charger needs to be serviced with new wiring.
When: Monthly
Item: AC Power Cord and Mounting Hardware Inspection
Process: Visually inspect the AC power cord. Confirm ground blade is present and plug
blades are in good condition and not bent out of place.
Check all mounting hardware to ensure there is no loose hardware. Tighten where
required.
When: Monthly
AC Power and Charging LED Status Indicators
The ProSport includes two LED indicators as shown below.
Blue “AC Power” LED indicator:
Green charge complete and charger on float.
Red “Charging” LED indicator, high charge rate on
Battery type selected LED, green = sealed lead acid, red = calcium, amber = open lead acid .
8
14
13
12
11
14.6V
13.3V
Charging Conditioning Maintenance / Float Mode
Average Voltage
Volts
Multi-Stage Charging Overview
When the charger is turned on, the blue power indicator will turn on followed by the red charging LED
indicator.
The multi-stage charger will provide the following:
Unit Charging
During this mode the ProSport will use ist available charging amps (as controlled by temperature) until the
battery voltage is raised to 14.4 - 15.1 depending on the voltage selected.
ProSport Conditioning
The unit will hold batteries at the high voltage to complete charging while conditioning batteries by desulfating
each battery connected. Upon completion the ProSport will go into float mode.( green ready l.e.d. )
3. Float / Maintenance Mode
During this mode the green ready led will be on indicating that the charging process is over and that the
charger is now maintaining your batteries on-board. Only the green LED will remain on, indicating “Power On /
Float-Maintenance Mode”.
This is a precision 13.5 volts (lead-acid factory setting) finishing voltage that maintains each battery, perfect
for short or long storage periods and never overcharging your batteries (step down voltage regulation mode).
Power
Charge
Ready
Battery
Type
Green
Sealed/Gel
Red
Calcium
Amber
Open lead

9
Owner's Periodic Maintenance Guide
Item: Battery Connections
Process: Clean and tighten all battery connections. Follow battery manufacturer’s instructions
for cleaning a battery. Clean all battery terminals with a wire brush where required
and tighten all battery connections.
When: Monthly
Item: Battery Electrolyte
Process: Per battery manufacturer’s instructions monitor and maintain proper levels of
distilled water in each battery.
When: Monthly
Item: DC Output Wiring
Process: Visually inspect all wiring for cuts and abrasions.contact Sterling Power Products if
charger needs to be serviced with new wiring.
When: Monthly
Item: AC Power Cord and Mounting Hardware Inspection
Process: Visually inspect the AC power cord. Confirm ground blade is present and plug
blades are in good condition and not bent out of place.
Check all mounting hardware to ensure there is no loose hardware. Tighten where
required.
When: Monthly
AC Power and Charging LED Status Indicators
The ProSport includes two LED indicators as shown below.
Blue “AC Power” LED indicator:
Green charge complete and charger on float.
Red “Charging” LED indicator, high charge rate on
Battery type selected LED, green = sealed lead acid, red = calcium, amber = open lead acid .
8
14
13
12
11
14.6V
13.3V
Charging Conditioning Maintenance / Float Mode
Average Voltage
Volts
Multi-Stage Charging Overview
When the charger is turned on, the blue power indicator will turn on followed by the red charging LED
indicator.
The multi-stage charger will provide the following:
Unit Charging
During this mode the ProSport will use ist available charging amps (as controlled by temperature) until the
battery voltage is raised to 14.4 - 15.1 depending on the voltage selected.
ProSport Conditioning
The unit will hold batteries at the high voltage to complete charging while conditioning batteries by desulfating
each battery connected. Upon completion the ProSport will go into float mode.( green ready l.e.d. )
3. Float / Maintenance Mode
During this mode the green ready led will be on indicating that the charging process is over and that the
charger is now maintaining your batteries on-board. Only the green LED will remain on, indicating “Power On /
Float-Maintenance Mode”.
This is a precision 13.5 volts (lead-acid factory setting) finishing voltage that maintains each battery, perfect
for short or long storage periods and never overcharging your batteries (step down voltage regulation mode).
Power
Charge
Ready
Battery
Type
Green
Sealed/Gel
Red
Calcium
Amber
Open lead

Important Notice: FCC Class A Part 15 Notification
Your battery charger has been designed and tested to comply with FCC Class A part 15. These regulations
are to provide adequate protection agaings harmful interference while operated in a commercial application. If
in a residential setting you are encountering interference with TV and radio reception, simply remove AC from
the ProSport to confirm if your battery charger is causing interference. As an end user you can explore the
following measures to minimise interference.
1) Choose a different AC circuit to power your ProSport charger.
2) Make sure all electrical appliances are properly grounded.
3) Re-position receiving aerial.
10
Trouble Shooting Guide
No Blue LED Indicator
Check for loss of power at the AC outlet. Confirm RCD has not tripped. Check with a meter or AC test
light that AC is present at the end of your extension cord.
Confirm all charger cables are installed with the correct polarity connections at each battery and that all
connections are clean and tight.
With the AC power removed and the engine switched off, check the charge level of each battery with a
DC meter or with the Sterling DC Voltage Probe & Diagnostics Tool. If there is no charge level indication
for a battery, check each battery with a hydrometer to determine if it has one or more bad cells.
(Batteries should always be replaced in sets and always the same type.)
If everything above checks out okay and you still don’t get any output from the charger, contact Sterling
Power Products for product service.
Battery is Not Charging, Red and Green Indicator is “on”
Confirm all charger cables are installed with the correct polarity connections at each battery, and that all
connections are clean and tight. Reverse polarity connections will blow output fuse, resulting in no
output voltage.
With the charger on, read DC voltage at each battery. If any of the readings are less than 13 volts,
proceed with the following:
A. Disconnect AC power at the AC outlet.
B. Remove charger cables from each battery.
C. Reconnect AC power and read DC voltage across each output cable. If output voltage is
approximately 13 volts, then the charger is okay and each battery should be tested with a hydrometer
with the charger and the engine off to determine if one or more batteries have bad cells. (Batteries
should always be replaced in sets and always the same type.)
D. If there is no output when trying to read DC voltage, check each output fuse and replace as needed.
If the DC voltage at each charger output is less than 13.0 volts, contact Sterling Power Products for
product service.
Customer Service & Warranty
We are committed to customer satisfaction and value your business. If at any time during the warranty period
you experience a Problem with your Sterling charger, simply check our phone number on www.sterling-
power.com.
Limited Two-Year Factory Warranty
Each ProSport model is guaranteed against defects in material and workmanship to the original consumer in normal use for 2 years
from the date of purchase. Sterling Power Products Ltd. will at ist discretion repair or replace free of charge any defects in material
or workmanship. The following conditions apply:
!Warranty is void if unauthorised repairs attempted.
!The customer is responsible for returning the product to Sterling Power Products Ltd. Inbound shipping costs must be
prepaid.
!This warranty does not cover blemishes due to normal wear and tear or damages caused by accidents, abuse,
alterations or misuse.
!Repairs not covered by this warranty can be done at the customer’s request and expense.
Purchase or other acceptance of the product shall be on the condition and agreement that Sterling Power Products Ltd. shall not be
liable for incidental or consequential damages of any kind. (Some countries do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitations may not apply to you.) This warranty is made in lieu of all other obligations or
liabilities on the part of Sterling Power Products Ltd. Sterling Power Products Ltd. neither assumes nor authorises any person for
any obligation or liablility in connection with the sale of this product.
To make a claim under warranty, contact Sterling Power Products Ltd., ( for latest contact detials ). The
customer has to provide a proof of purchase. Sterling Power Products Ltd. will make ist best effort to repair or replace the product, if
found defective, within 30 days after return of the product to the company. Sterling Power Products Ltd. will ship the repaired or
replaced product back to the customer in the UK, all warantee is at the factory
This warranty is in lieu of all others expressed or implied.
www.sterling-power.com
STERLING POWER PRODUCTS LTD
Website for Europe:
Website for U.S.A - www.sterling-power-usa.com
E-mail USA: [email protected]
www.sterling-power.com
E-mail Europe: [e-mail]
Copyright 2006 by Sterling Power Products Ltd. Copying and reprinting not allowed.
Changes and errors excepted. 11
Specification
input voltage 90-250 v
power factor 0.88
Unit power consumption 500 watts
A/C fuse required 10 amps to cover 110 and 230 v operations

Important Notice: FCC Class A Part 15 Notification
Your battery charger has been designed and tested to comply with FCC Class A part 15. These regulations
are to provide adequate protection agaings harmful interference while operated in a commercial application. If
in a residential setting you are encountering interference with TV and radio reception, simply remove AC from
the ProSport to confirm if your battery charger is causing interference. As an end user you can explore the
following measures to minimise interference.
1) Choose a different AC circuit to power your ProSport charger.
2) Make sure all electrical appliances are properly grounded.
3) Re-position receiving aerial.
10
Trouble Shooting Guide
No Blue LED Indicator
Check for loss of power at the AC outlet. Confirm RCD has not tripped. Check with a meter or AC test
light that AC is present at the end of your extension cord.
Confirm all charger cables are installed with the correct polarity connections at each battery and that all
connections are clean and tight.
With the AC power removed and the engine switched off, check the charge level of each battery with a
DC meter or with the Sterling DC Voltage Probe & Diagnostics Tool. If there is no charge level indication
for a battery, check each battery with a hydrometer to determine if it has one or more bad cells.
(Batteries should always be replaced in sets and always the same type.)
If everything above checks out okay and you still don’t get any output from the charger, contact Sterling
Power Products for product service.
Battery is Not Charging, Red and Green Indicator is “on”
Confirm all charger cables are installed with the correct polarity connections at each battery, and that all
connections are clean and tight. Reverse polarity connections will blow output fuse, resulting in no
output voltage.
With the charger on, read DC voltage at each battery. If any of the readings are less than 13 volts,
proceed with the following:
A. Disconnect AC power at the AC outlet.
B. Remove charger cables from each battery.
C. Reconnect AC power and read DC voltage across each output cable. If output voltage is
approximately 13 volts, then the charger is okay and each battery should be tested with a hydrometer
with the charger and the engine off to determine if one or more batteries have bad cells. (Batteries
should always be replaced in sets and always the same type.)
D. If there is no output when trying to read DC voltage, check each output fuse and replace as needed.
If the DC voltage at each charger output is less than 13.0 volts, contact Sterling Power Products for
product service.
Customer Service & Warranty
We are committed to customer satisfaction and value your business. If at any time during the warranty period
you experience a Problem with your Sterling charger, simply check our phone number on www.sterling-
power.com.
Limited Two-Year Factory Warranty
Each ProSport model is guaranteed against defects in material and workmanship to the original consumer in normal use for 2 years
from the date of purchase. Sterling Power Products Ltd. will at ist discretion repair or replace free of charge any defects in material
or workmanship. The following conditions apply:
!Warranty is void if unauthorised repairs attempted.
!The customer is responsible for returning the product to Sterling Power Products Ltd. Inbound shipping costs must be
prepaid.
!This warranty does not cover blemishes due to normal wear and tear or damages caused by accidents, abuse,
alterations or misuse.
!Repairs not covered by this warranty can be done at the customer’s request and expense.
Purchase or other acceptance of the product shall be on the condition and agreement that Sterling Power Products Ltd. shall not be
liable for incidental or consequential damages of any kind. (Some countries do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitations may not apply to you.) This warranty is made in lieu of all other obligations or
liabilities on the part of Sterling Power Products Ltd. Sterling Power Products Ltd. neither assumes nor authorises any person for
any obligation or liablility in connection with the sale of this product.
To make a claim under warranty, contact Sterling Power Products Ltd., ( for latest contact detials ). The
customer has to provide a proof of purchase. Sterling Power Products Ltd. will make ist best effort to repair or replace the product, if
found defective, within 30 days after return of the product to the company. Sterling Power Products Ltd. will ship the repaired or
replaced product back to the customer in the UK, all warantee is at the factory
This warranty is in lieu of all others expressed or implied.
www.sterling-power.com
STERLING POWER PRODUCTS LTD
Website for Europe:
Website for U.S.A - www.sterling-power-usa.com
E-mail USA: [email protected]
www.sterling-power.com
E-mail Europe: [e-mail]
Copyright 2006 by Sterling Power Products Ltd. Copying and reprinting not allowed.
Changes and errors excepted. 11
Specification
input voltage 90-250 v
power factor 0.88
Unit power consumption 500 watts
A/C fuse required 10 amps to cover 110 and 230 v operations