paco SVDC1225 User manual

DC- DC & SOLAR BATTERY CHARGER
Dual Input DC 25Amp & 50Amp, 5 StagesAutomatic Switchmode
Instruction Manual
Please read usermanual carefully before use.
P/No. SVDC1225, SVDC1225A,SVDC1250, SVDC1250A

1
1. WARNINGS
2. FEATURES
Use of anattachment not recommended or sold by the SVDC1225 / SVDC
1250 may resultin a risk of fire, electric shock, or injuryto persons.
Explosive gases mayescape from the battery during charging.
Prevent flames andsparks and provide adequate ventilation.
Before charging, readthe instructions.
Specialized for charging12V lead acid and lithium ion with LiFePO4 battery.
Do not attemptto charge non-rechargeable batteries.
When charging, batteriescan emit explosive gases, therefore it is essential
to prevent flamesand sparks.
Do not operatecharger with damaged cord - replace the cord immediately.
Make sure thatcables used have sufficient cable area,see CABLE
DIMENSIONS.
Never charge afrozen battery.
Corrosive substances mayescape from the battery during charging and
damage delicate surfaces.Store and charge in a suitable area.
Fit fuses asclose to the batteries as possible to protect thecable in case of
short circuit.
This appliance isnot intended for use by young children or infirm persons
unless they havebeen adequately supervised by a responsible person to
ensure that theycan use the appliance safely.
Young children should be supervised to ensurethat they do not play with
the appliance.
This is afully automatic battery charger with 5 charge stages.
Automatic chargingprotects your battery from being overcharged.
The DC-DC chargeris purposely designed for charging auxiliary batteries.
It includes allthe features needed to maintain the auxiliary battery toits
optimum condition andto prolong the battery life.
5-stage charging isa very comprehensive and accurate charging process
that gives yourbattery longer life and better performance compared to using
traditional chargers.
5-stage chargers aresuitable for most battery types including GEL, AGM,WET,
CALCIUM and Lithium-ionwith LiFePO batteries. They mayalso help restore
4
drained and sulphatedbetter.

2
GEL AGM WET CALCIUM LITHIUM LIMIT
1
BULK
4
PULSE
2
ABSORPTION
Equalisation
(Calcium
mode only)
3
FLOAT
*Constant Current up to:
Constant voltage until current drops to15%
14.1V
14.1V
14.4V
14.4V
14.7V
14.7V
15.4V
15.4V
14.4V
14.4V
30 minutes
13.7V 13.6V
10 days Charge
cycle restarts if
voltage drops
Charge cycle
restarts if
voltage drops
15% Constant Current Charge up to 16V then hold 1 hour
(5 hours timeout)
NOTE: Please ensure the correct type ofbattery to be charged
(especially for the lithium-ion with LiFePO4battery)
The 5 stages are: Soft Start, Bulk,Absorption, Float and Pulse
V
A
245
STEP 2 STEP 3
MAIN CHARGING
BATTERY
IS CHARGED
T0 80%
TOP CHARGE
YOUR VEHICLE
CAN BE STARTED
AFTER THIS STEP
FULLY CHARGED
BATTERY
MAINTENANCE
CHARGING
EQUALISATION
(Calcium mode only)
Retums a full
hydrometer reading
to calcium batteries
by removing acid
stratification.
STEP 4 STEP 5
31
STEP 1
INCREASES
BATTERY LIFE BY
GENTLY STARTING
TO CHARGE
THE BATTERY.
SOFT START
5
25% Current until 11v
During
12.6V-
14.1V the
current
control at
100%~10%
During
12.6V-
14.4V the
current
control at
100%~10%
During
12.6V-
14.7V the
current
control at
100%~10%
During
12.6V-
15.4V the
current
control at
100%~10%
During
12.6V-
14.4V the
current
control at
100%~10%

3. SWITCHMODE TECHNOLOGY
3
STEP 1 SOFTSTART
A preliminarycharge processes that gently introduces power to the battery.
This protects thebattery and increases battery life.
STEP 2 Bulk(Constant Current)
Charging with maximumcurrent until approximately 80 % battery capacity.
STEP 3Absorption (Constant Voltage)
Charging with decliningcurrent to maximize up to 100% battery capacity.
STEP 4 Float
The Float stagemaintains the battery at 100% charge without overcharging
or damaging thebattery. This means thecharger can beleft connected to the
battery indefinitely.
STEP 5 Pulse
Maintaining the batteryat 95-100% capacity. The chargermonitors the battery
voltage and givesa pulse when necessary to keep the battery fully charged.
The battery chargerhas a 5-step fully automatic charging cycle, the cycleis
repeated infinitely.If the terminalvoltage drops below a lower limit, the charger
automatically goes backto the beginning of the charging curve.
The SVDC1225 /SVDC1250 converts your vehicle's 12VDC/24VDC alternator
power to thevoltage level allowing your batteries to be fully charged, prolonging
battery life andreliability with the latest synchronous switching technology.
DUAL INPUT OPERATION
The SVDC1225 /SVDC1250 Dual has 2 inputs. TheService battery will be
charged from thealternator, solar panel, or both in combination. Thesolar
panel adjusts itselfto the Starter battery voltage. TheStarter battery will be
charged and maintaineddirectly by the solar panel if the Service batteryis
fully charged.
SOLAR MPPT
The SVDC1225 /SVDC1250 utilises sophisticated MPPT (Maximum Power
Point Tracking)solar regulator technology. MPPT maximisesthe power
generated from thesolar panels to the auxiliary battery.
IGNITION CONNECTION
The SVDC1225 /SVDC1250 can be wired to the vehicle's ignition allowing
it to operateonly when the ignition is turned on. The ignitionconnection also
activates the lowerinput voltage operation to suit vehicles with smart
(variable voltage) alternators.

4
4. PROTECTIVE FEATURES
POWER SUPPLY (CONSTANT VOLTAGE OF 13.8 VOLTS)
This sets thecharger in power supply mode giving a constant voltage of
13.8VDC. This modeis best used where appliances aredrawing power
from the battery, for example like a Fridge. Although thecharger is designed
to work witha battery connected, it can also work without a battery.
TEMPERATURE COMPENSATION
The SVDC1225 /SVDC1250 is supplied with a 2 metre temperature sensor.
The sensor monitorsthe battery temperature and adjusts (compensates) the
charger's output toprevent overcharging. This is ideal forbatteries used in
warmer climates orenvironments.
Spark-Free Protection
The SVDC1225 /SVDC1250 will not start charging the battery (no output)
unless the loadis securely connected. It prevents the output leads from
sparking due toaccidental short circuit making the charger safer to use
around batteries.
Reverse Connection Protection
Reverse connection oninput and output terminals does not damage
SVDC1225 / SVDC1250internal circuit. The SVDC1225 / SVDC1250detects
reverse connection conditionand indicates whether input or output connection
is reversed.
Over and UnderVoltage Protection
The charger willautomatically shut down if there is an over voltage or under
voltage problem.
Over TemperatureProtection
The charger willlower its output current if the temperature of the unit begins to
overheat.

5
5. PRODUCT OVERVIEW
Stage lamp
Battery Type lamp
Battery Mode Button
Charging lamp
Alternator lamp
Solar lamp
Mounting Slots 4.5mm
Output Cable
Ext. LED Cable
Ignition Cable
Solar in Cable
Alt.in Cable
Ground Cable
Temperature Sensor Cable
SVDC1225 SVDC1250
Power supply lamp

6
SVDC1225A SVDC1250A
Solar in (+) Cable
Ground (-) Cable
Alt.in (+) Cable
Ground (-) Cable
Output (+) Cable
Ground (-) Cable
Anderson Plug (Optional)
Ignition Cable
Ext. LED Cable
Temperature Sensor Cable
Stage lamp
Battery Type lamp
Battery Mode Button
Charging lamp
Alternator lamp
Solar lamp
Mounting Slots 4.5mm
Power supply lamp
OUTPUT
ALT IN
SOLAR IN
NOTE: Please ensure thecorrect type of battery to be charged (especially for
the lithium-ion withLiFePO4battery)

7
unit:mm
6.DLMENSIONS
SVDC1225
SVDC1250
4.5
114
161
142
85
811
44
161
4.5
114
199
180
120
811
44
199

7. TECHNICAL SPECIFICATIONS
Operating Conditions
Charger model
Solar Input Voltage Range
Alternator Input Voltage Range
Output Current
Input Current (No Load)
Efficiency
Back Drain on Auxiliary Battery
External LED Output-Constant Current
Minimum Start Voltage (Battery)
Input Fuse Rating
Output Fuse Rating
Maximum Output Power
Ambient temperature
Dimension (L W H)
Weight
Charge Control
Charger type
9-32Vdc
25A
Charger Model 50mA
App.93%
35mA, +/-5%
6mA
2V
50A (Not supplied)
50A (Not supplied)
375W
-10 to +80
Output power is reduced automatically at
high temperatures
161 114 44mm
1.3kg
5-step fully automatic charging
8
SVDC1225/SVDC1225A SVDC1250/SVDC1250A
9-32Vdc
50A
Supply Model 80mA
App.95%
100A (Not supplied)
100A (Not supplied)
750W
Power Supply Output 13.8Vdc, 25A 13.8Vdc, 50A
199 114 44mm
1.7kg
Soft Start 6.25A upto 11V 12.5A up to 11V
Specifications are subjected tochange without prior notice.

9
Bulk
Absorption
Float
Pulse
Battery Range
Types of Batteries
Deep Cycle
VSR Model-Default
(Ignition Override Not Connected)
Low Voltage Model- Ignition
Override cable connected to
ignition switch (Ignition on)
EMC
IP Rating
Equalisation
(Calcium mode only)
3.8A Constant Current Charge
up to 16V then hold 1 hour
(5 hours timeout)
Turn on
13.2V
Turn on
12.2V
Turn off
12.8V
Turn off
10.5V
Turn on
26.4V
Turn on
24.4V
Turn off
25.2V
Turn off
23.2V
EN 61000, EN 55014 Class B
IP67
25A upto
14.1V (GEL)
14.4(AGM)
14.7V(WET)
15.4V(CALCIUM)
14.4V(LITHIUM)
50A upto
14.1V (GEL)
14.4(AGM)
14.7V(WET)
15.4V(CALCIUM)
14.4V(LITHIUM)
Constant voltage until
current drops to3.8A
13.7V Also with pulse feature (GEL, AGM, WET, CALCIUM)
13.6V Alsowith pulse feature (LITHIUM)
12.6V- 14.1V, 25-2.5A(GEL)
12.6V- 14.4V, 25-2.5A(AGM)
12.6V- 14.7V, 25-2.5A(WEL)
12.6V- 15.4V, 25-2.5A(CALCIUM )
12.6V- 14.4V,25-2.5A(LITHIUM)
12.6V- 14.1V, 50-5A(GEL)
12.6V- 14.4V, 50-5A (AGM)
12.6V- 14.7V, 50-5A(WEL)
12.6V- 15.4V, 50-5A(CALCIUM )
12.6V- 14.4V, 50-5A(LITHIUM)
Constant voltage until
current drops to7.5A
7.5A Constant Current Charge
up to 16V then hold 1 hour
(5 hours timeout)
GEL, AGM, WET,
CALCIUM
LITHIUM
GEL, AGM, WET,
CALCIUM
LITHIUM
75-300Ah 50-250Ah 150-600Ah 100-500Ah
Types ofBatteries
All types of 12V lead-acid batteries
(GEL, AGM, WET, CALCIUM) and LITHIUM batteries
Operating Model
12V Vehicle 24V Vehicle
Standards
Time delay function There is a 30 second delay before charger will cut in or cut out.

8. HOW TO READ LEDDISPLAY
LED Charge Indicators
Note: : Solid : Flashing
10
Power off
Power off
Normal mode
Normal mode
Solar charging mode
Solar charging mode
Alternator charging mode
Alternator charging mode
Solar input high voltage
Solar input high voltage
Solar input reverse
Solar input reverse
Alternator input reverse
Alternator input reverse
Output fault mode
Output fault mode
Alternator high voltage
Alternator high voltage
Solar
lamp
Alternator
lamp
Charging
lamp
Stage lamp S1
lamp
S2
lamp
S3
lamp
S5
lamp
Stage lamp WET
lamp
Calcium
lamp
Lithium
lamp
GEL
lamp
AGM
lamp
SOLAR
ALTERNATOR
CHARGING
MODE
1
SOFT START
2
ABSORPTION
3
FLOAT
45
PULSE
WETGEL AGM CALCIUM LITHIUM POWER
SUPPLY
12V 50A DC 5-STAGE
COMPATIBLE
LITHIUM
BULK
BATTERY TYPE
S4
lamp
Supply
lamp

9. FAULT CODES
There are errorcodes that may be displayed. Thesewill be displayed in the
following way:
11
Stage lamp
Solar input high voltage
Solar input reverse
Alternator high voltage
Alternator input reverse
Output fault mode
S1
lamp S3 lamp S4 lamp S5 lamp GEL lamp AGM lamp WET
lamp
Cause Remedy
Overvoltage is
detected at solar input
Solar input is reverse
connected
Overvoltage is
detected at Alternator
Alternator input is
reverse connected
Output battery is
reverse connected
Overvoltage is
detected at output
Output open circuit
or dead Battery
Check solar panel
open circuit voltage
Check solar input
connection
Check vehicle battery
voltage
Check Alternator input
connection
Check output
cable connection
Check auxiliary
battery voltage
Check auxiliary
battery voltage &
cable connections
Stage lamp
Solar input high voltage
Solar input reverse
Alternator high voltage
Alternator input reverse
Output fault mode
Calcium
lamp
Lithium
lamp
Note: : Solid : Flashing
S2
lamp
Supply
lamp

MOUNTING
WIRING
2
Recommended minimum cable dimensions in mm
*Note the above recommendationis valid for cablelength up to 12m.
10. INSTALLATION
Cable
Alternator Input Cable (Red)
Solar Input Cable (Green)
Output Cable (Grey)
Common Ground (Black)
Ignition Override (Blue)
External LED (Pink)
Size
2
8mm /AMG8
2
8mm /AMG8
2
8mm /AMG8
2
8mm /AMG8
2
1-1.5 mm
2
1-1.5 mm
12
The rugged designof the SVDC1225 / SVDC1250 affordsit to be mounted
wherever best suitsthe application. By using advanced potting technology
the unit isresistant to shock,vibration, dust and water allows for under-bonnet
or in-vehicle installation.Clever'side extrusions' incorporated within the
enclosure allow theunit to be mounted to flat surfaces as close to the auxiliary
battery as possible.It is advisable however to keep the charger asfar away
from exhausts, turbo'sor any other high temperate components to ensure
improved performance.
Tomake sound electrical connections, battery cables will need to be made to
the correct length.Cable lugs should be crimped or soldered to the stripped
battery cable andthen protected with the supplied heat shrink. Butt splices
should be usedfor cable extension.
SVDC1225 SVDC1250
2
10mm /AMG8
2
10mm /AMG8
2
10mm /AMG8
2
10mm /AMG8
(1). Disconnect thenegative battery cable (Earth) from the vehicle's starting
battery or disconnectpower to the trailer. Note: Toprevent the loss of vehicle
electronic memories, radiopresets & security codes, it is recommended that
an Electrical System Memory Protector be used.
(2). Connect theAuxiliary Battery positive (+) terminal to the OutputCable
(grey colour) fromSVDC1225 / SVDC1250. Fit a 50A/100A fuse to the cable
as close aspossible to the Auxiliary Battery positive (+) terminal.

13
(3). Connect theAuxiliary Battery negative (-) terminal to the SVDC1225/ SVDC
1250 Common Groundcable (black colour). Alternatively connect both Auxiliary
Battery negative (-)terminals and SVDC1225 / SVDC1250 Common Ground
cable to vehiclechassis ground.
(4). Connect theStarter Battery positive (+) terminal to the SVDC1225 /SVDC
1250 AlternatorInput cable (red colour). Fit a 50A /100Afuse to the cable as
close as possibleto the Starter Battery positive (+) terminal.
(5). If yourvehicle has fixed voltage or temperature compensating alternator
installed, leave theIgnition Override cable (blue colour) open.
If your vehiclehas smart (variable voltage) alternator installed, the Ignition
Override cable mustbe connected to the vehicle's ignition. The SVDC1225 /
SVDC1250 will onlyoperate when the vehicle's ignition is turned on.
However, ifsolar panels are connected to SVDC1225 / SVDC1250, thecharger
will operate andonly draw power from solar panels (assuming vehicle's ignition
is turned off).
Fit a 1-2Afuse to the cable as close as possible to the vehicle's ignition.
Consult the vehiclemanufacturer for type of alternator installed in your vehicle.
(6). When 12Vsolar panels are present, connect the solar panel positive
terminal (+)to theSVDC1225 / SVDC1250 Solar Input cable (green colour).
Fit a 50A/100A fuse to the cable as close as possible to the Solar Panel
positive (+) terminal.
Then, connect theSolar Panel negative (-) terminal to the SVDC1225 /SVDC
1250 Common Groundcable (black colour). Alternatively connect both Solar
Panel negative (-)terminals and SVDC1225 / SVDC1250 Common Ground
cable to vehiclechassis ground.
(7). The externalLED wire provides 4mA constant current output. It can power
an LED panelmount indicator with or without an internal resistor.
Leave External LEDcable open if you do not need the external LED indication.
If external LEDindication is required, connect the positive (+) terminal ofa
LED Indicator tothe External LED cable.
Then, connect thenegative terminal of LED Indicator to the vehicle chassis
ground.

14
11. SELECTIONOF AUXILIARY BATTERY TYPE
Heatshrink Temperature
Sensing Cable
(8). Cut/remove Temperature Sensing cableif temperature compensated
battery charging isnot needed. Use supplied heatshrink to insulate the open
end of Temperature Sensing cable.
If temperature compensatedcharging is required, attach the ring terminal of
the Temperature Sensing cable to the auxiliary battery negative terminal.For
best results, attachthe ring terminal to the auxiliary battery plastic surface
with thermal conductiveadhesive such as 3M TC-2810 orequivalent.
Press the Modebutton on the front panel until all Battery ChemistryLEDs are
flashing. There are5 battery chemistriesavailable: Gel, AGM, Wet, Calcium
and Lithium -ionwith LiFePO Keep pressing thebutton momentarily until the
4.
Battery Chemistry LEDyou want is flashing. After you release thebutton, your
selection is enteredand saved. Your selection will be restored automatically
even after theSVDC1225 / SVDC1250 is fully disconnected and reconnected.
The default BatteryChemistry is AGM.

15
12.TYPICAL WIRING INSTALLATION
(1).Full System
Figure 1: SVDC1225/ SVDC1250 WARNING!
Max 32V input
Do not connect two solar panels in series
DC-DC & Solar BatteryCharger
Dual Input DC 12V 50A 5- stage
For vehicles fitted with
a Smart Alternator only
I
T I
O
N
N
G
I
S
T
K
A
C
R
O
T
L
Fuse
Ground/Chassis
Battery 1
(Starter Battery)
12V Solar Panel
Earth/Chassis
Earth/Chassis
Fuse
Temp Sensor mount
to battery casing
Battery 2
(Aux Battery)
LED Panel
Mount Indicator
Earth/Chassis
Solar-Green (8mm2)
Ground/Chassis-Black (8mm2)
Ignition override-Blue (1.5mm2)
connects to ignition feed if smart alt.
Alternator/Starter Battery-Red (8mm2)
output/Auxiliary Battery-Grey (8mm2)
Temperature Sensing-Black
(twin core)
External LED - Pink (1.5mm2)

16
Figure2:SVDC1225A /SVDC1250A
WARNING!
Max 32V input
Do not connect two solar panels in series
DC-DC & Solar BatteryCharger
Dual Input DC 12V 50A 5- stage
For vehicles fitted with
a Smart Alternator only
I
T
I
O
N
N
G
I
S
T
K
A
C
R
O
T
L
Fuse
Battery 1
(Starter Battery)
12V Solar Panel
Fuse
Temp Sensor mount
to battery casing
Battery 2
(Aux Battery)
LED Panel
Mount Indicator
Earth/Chassis
Ground/Chassis-Black (8mm2)
Ignition override-Blue (1.5mm2)
connects to ignition feed if smart alt.
Temperature Sensing-Black
(twin core)
External LED- Pink (1.5mm2)
Alternator/Starter Battery-Red (8mm2)
Anderson Plug (Optional)
Solar-Green (8mm2)
Anderson Plug (Optional)
Anderson Plug (Optional)
output/Auxiliary Battery-Grey (8mm2)

17
(2). Alternator/Starter Battery Input Only
Figure 3: SVDC1225/ SVDC1250
DC-DC & Solar BatteryCharger
Dual Input DC 12V 50A 5- stage
For vehicles fitted with
a Smart Alternator only
I
T
I
O
N
N
G
I
S
T
K
A
C
R
O
T
L
Fuse
Ground/Chassis
Battery 1
(Starter Battery)
Earth/Chassis
Fuse
Temp Sensor mount
to battery casing
Battery 2
(Aux Battery)
LED Panel
Mount Indicator
Earth/Chassis
Ground/Chassis-Black (8mm2)
Ignition override-Blue (1.5mm2)
connects to ignition feed if smart alt.
output/Auxiliary Battery-Grey (8mm2)
Temperature Sensing-Black (twin core)
External LED - Pink (1.5mm2)
Alternator/Starter Battery-Red (8mm2)

18
Figure4: SVDC1225A/ SVDC1250A
DC-DC& SolarBatteryCharger
Dual Input DC 12V 50A 5- stage
For vehicles fitted with
a Smart Alternator only
I
T
I
O
N
N
G
I
S
T
K
A
C
R
O
T
L
Fuse
Battery 1
(Starter Battery)
Fuse
Battery 2
(Aux Battery)
LED Panel
Mount Indicator
Earth/Chassis
Ground/Chassis-Black (8mm2)
Ignition override-Blue (1.5mm2)
connects to ignition feed if smart alt.
Temperature Sensing-Black (twin core)
External LED - Pink (1.5mm2)
Alternator/Starter Battery-Red (8mm2)
Anderson Plug (Optional)
Anderson Plug (Optional)
output/Auxiliary Battery-Grey (8mm2)
Temp Sensor mount
to battery casing

19
(3).Solar Battery InputOnly
Figure 5: SVDC1225/ SVDC1250
DC-DC& Solar Battery Charger
Dual Input DC 12V 50A 5- stage
12V Solar Panel
Earth/Chassis
Earth/Chassis
Fuse
Battery 2
(Aux Battery)
LED Panel
Mount Indicator
Earth/Chassis
Solar-Green (8mm2)
Ground/Chassis-Black (8mm2)
output/Auxiliary Battery-Grey (8mm2)
Temperature Sensing-Black (twin core)
Temperature Sensing-Black (twin core)
Temp Sensor mount
to battery casing