Victron energy BlueSolar PWM DUO 12V 24V 20A LCD USB User manual

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BlueSolar PWM DUO-LCD-USB

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1. General Information
The BlueSolar PWM DUO 12V|24V|20A LCD-USB series uses Pulse Width Modulation
(PWM) charge voltage control combined with a multistage charge control algorithm. This
leads to superior charging and enhanced battery performance. The filtered PWM power
control system uses highly efficient and reliable power MOSFET transistors.
2. Features
•Three stage battery charging [bulk – absorption – float]
•External Temperature sensor included
•2 Battery outputs for 2 separate batteries.
•Battery type: Lead-Acid and LiFePO4
•Protected against reverse polarity connection of the solar panels and/or battery.
•USB output for charging telephones and tablets.
•Temperature protection.
3. Installation
IMPORTANT
•Always connect battery 1 first, in order to allow the Controller to
recognize system voltage.
•Use a 12V (36 cells) solar array for a 12V system.
•Use a 24V (72 cells) solar array for a 24V system.
Important note: always connect the battery 1 first.

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1. Connect the battery1 - plus and minus.
2. Connect the battery2 - plus and minus.
3. Connect the solar array - plus and minus.
The reverse order applies when deinstalling.
An improper sequence order can damage the BlueSolar PWM DUO 12V|24V|20A LCD-
USB!
1. Make sure your battery1 is charged for the BlueSolar PWM DUO 12V|24V|20A LCD-USB
to recognize the battery type before first installation.
2. The battery cables should be as short as possible to minimize losses.
3. The BlueSolar PWM DUO 12V|24V|20A LCD-USB is only suitable for lead-acid, and
LiFePO4 batteries.
4. The BlueSolar PWM DUO 12V|24V|20A LCD-USB is only suitable for regulating solar
modules. Never connect another charging source to the charge BlueSolar Charge
Controller.

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4. LCD DISPLAY and SETTINGS
4.1 Monitoring and settings
Values between [ ] are for 24V battery settings
Boot Display. After connecting the battery the display shows
the solar charger model and the system voltage as
recognized by the solar charger.
1220= BlueSolar PWM DUO 12V|20A
2420= BlueSolar PWM DUO 24V|20A
Press MENU to enter next display.
MENU：switch between different displays, or to enter/exit setting by long
press.
UP：press to change the settings when in setting mode.
DOWN: press to change the settings when in setting mode.

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Main display: battery1 voltage, battery state of charge, charging
status.
If arrow is flashing charger is in float.
By arrow of: no solar available.
Press MENU to enter next display.
Change settings in
Main display.
Press the MENU
button for several
seconds until the
display flashes, you are
in:
Battery type setting.
See table below.
The factory setting is b01
Press on the MENU
key again and you
are in:
Charging Ratio of Battery 1
Current ratio to battery1
20% means 20% of available current
to battery 1 and 80% to Battery2
during Bulk phase.
The factory setting is 50%
Note: In the normal charging status, the controller will divide the charging as the setting.
When battery #1 is fully charged, more charge current will go to battery #2.
When the controller detects that only battery #1 is connected, all the charge current will go
to the battery #1 automatically.
Press on the MENU
key again and you
are in:
Charging Frequency
Frequency switching between
Battery1 and Battery2: 25, 50 or
100Hz
The factory setting is 25Hz
Battery type
Battery
voltage
Absorbtion
voltage
Float voltage
Low voltage
disconnect
Low voltage
reconnect
b01
LEAD-ACID
[AGM]
12.0V [24V] 14.4V [28.8V] 13.7V [27.4V] 11.2V [22.4V] 12.6V [25.2V]
b02
LEAD-ACID
[Gel]
12.0V [24V] 14.2V [28.4V] 13.7V [27.4V] 11.2V [22.4V] 12.6V [25.2V]
b03
LEAD-ACID
[Wet]
12.0V [24V] 14.6V [29.2V] 13.7V [27.4V] 11.2V [22.4V] 12.6V [25.2V]
b04 LiFePO4 12.8V 14.2V 13.35V 11.2V 12.6V
b05 LiFePO4 25.6V 28.4V 26.7V 22.4V 25.2V

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Battery2 display: battery2 voltage, battery state of charge,
charging status.
Press MENU to enter next display.
PV Voltage display: PV voltage and the state of charge of the
batteries.
Press MENU to enter next display.
Charge current display: Total PV to batteries1&2 current and the
state of charge of the battery.
If arrow is flashing charger is in float.
Press MENU to enter next display.
USB Voltage display: USB voltage
5V (2A max)
Press MENU to enter next display.
Internal controller temperature. If the BlueSolar PWM
DUO 12V|24V|20A LCD-USB gets hot during running it will shut
down and wait for the temperature to drop to normal level and
then it will start working again.
Press MENU to enter next display.
External Temperature Sensor temperature. If the external
temperature sensor is connected, battery absorption voltages will
corrected with -30mV/°C for 12V and -60mV/°C for 24V
Without sensor the temperature is 25°C
Press MENU to enter Main display.
For use with External Temperature Sensor connect the sensor to
the BlueSolar PWM DUO 12V|24V|20A

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5. Alarms
High temperature
When temp ≥ 85℃, the BlueSolar PWM DUO 12V|24V|20A
LCD-USB will lower the PV input current in order to lower the
temp. There is no alarm on the LCD display.
When temp >90℃, the BlueSolar PWM DUO 12V|24V|20A LCD-
USB the PV input current will be reduced to zero, the high temp
alarm icon will show on the LCD. After the temp has decreased
to less than 82℃, BlueSolar PWM DUO 12V|24V|20A LCD-USB
will resume normal operation.
Low battery1 voltage
Battery1 voltage <10.6V
Low battery2 voltage
Battery2 voltage <10.6V
High battery1 voltage
Battery1 voltage >16.5V
High battery2 voltage
Battery2 voltage >16.5V
High USB voltage
USB voltage >5.6V

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6.Specifications
BlueSolar PWM DUO
12V|24V|20 LCD-USB
12V|24V|20A
12V
24V
Battery Voltage 12/24V Auto Select
Charge Current
20A total Battery1&2
Charge mode
PWM
Maximum solar array voltage
55V
Solar voltage range
15-28V
30-55V
Self-consumption
<10mA
Protections
Reverse polarity connection of the solar panels.
Reverse polarity connection of the battery.
Low voltage disconnect.
Over-temperature protection.
Solar Panel
Recommended solar panel array 36cell 72cell
Max Solar Input Power 240W 480W
USB outputs
Voltage
5V
Current
2A (total from 2 USB outputs)
USB disconnect
10.5V
21.0V
USB reconnect
12.0V
24.0V
Default settings
Absorption charge (b01)1
14.4V
28.8V
Float charge (b01)1
13.7V
27.4V
External Temperature Sensor
Temperature compensation
-30mV/°C
-60mV/°C
Enclosure
Terminal size
16mm² / AWG6
Weight
300gr
Dimension (h x w x d)
101.50x184.00x47.10 mm
Mounting
Vertical wall mount, indoor only
Humidity (non condensing)
Max. 95%
Operating temperature
-35°C to +60°C (full load)
Cooling
Natural convection
Protection class
IP20
Standards
Safety
EN60335-1, IEC62109-1
EMC
EN61000-6-1, EN61000-6-3
1See also 4.1 Battery type setting.

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7. Mechanical drawing.