Programmable Solar Charge Controller with Nightlight Function CX10-1.1, CX20-1.1, CX40-1.1
User Manual English, Page 2
Nightlight Function (continued)
The controller recognizes day and night based on the solar array open
circuit voltage. In Programming Menu 6 this day/night threshold can be
modified according to the requirements of the local conditions and the
solar array used.
1.0 / 2.0V
4.9 / 9.8V
(factory
setting)
7.7 / 15.4 V
Curve of open-circuit voltage solar array
Threshold setting range
Switching point day > night
Switching point night > day
The two voltage levels before/ after the slash are valid for 12 V and 24 V
systems respectively.
To find the right value, we recommend measuring the solar array open
circuit voltage at the time when twilight has reached the level when the
controller should switch on/off. This value (the closest available) can
then be set according to the description in the programming section.
Switching off the Acoustic Signal
The controller has an acoustic signal which indicates the change of the
state of charge. This function can be deactivated in Programming
Menu 7.
Using the interface
The controller comes with a serial interface, which can be connected
to a PC with an optional interface adapter (CX-I) (see interface
adapter manual for details). In Programming Menu 8 the behaviour of
the serial interface can be modified.
Safety Features
The controller is protected against wrong installation or use:
At the solar
terminal
At the battery
terminal
At the load
terminal
Battery con-
nected with
correct polarity
Unrestricted Normal operation
Unrestricted
Battery con-
nected with
wrong polarity
Unrestricted
Unrestricted.
Acoustic Warning
Unrestricted
Reverse polarity
Yes, not at 24V
system voltage.
Yes, if only the
battery is con-
nected.
Acoustic Warning
Load output is
protected, but
loads might be
damaged.
Short circuit Unrestricted
Unrestricted.
CAUTION
must be pro-
tected by fuse.
Unrestricted
Overcurrent
Controller limits
current.
-----------------------
Controller
switches off load
terminal.
Thermal overload
Controller is
electronically
protected.
-----------------------
Controller
switches off load
terminal.
No connection Unrestricted Unrestricted Unrestricted
Reverse current Unrestricted -----------------------
-----------------------
Overvoltage Varistor 56 V, 2,3 J
Max. 40 V
Controller
switches off load
terminal.
Undervoltage Normal operation
Controller
switches off load
terminal.
Controller
switches off load
terminal.
WARNING: The combination of different error conditions may cause
damage to the controller. Always remove an error before you continue
connecting the controller!
Error Description
Error condition Display Reason Remedy
Battery is low
Load will recon-
nect as soon as
battery is re-
charged.
Overcurrent /
Short circuit of
loads
Switch off all
loads. Remove
short circuit.
Controller will
switch on load
automatically
after max 1
minute.
Controller is
thermally
overloaded
and has dis-
connected the
loads.
Check proper
ventilation of
controller.
After cooling
down the loads
are reconnected
automatically.
Battery voltage
too high
(>15.5 / 31.0 V)
Check if other
sources over-
charge the
battery. If not,
controller is
damaged.
Loads are not
supplied
Battery wires or
battery fuse
damaged,
battery has
high resistance
Check battery
wires, fuses and
battery.
Error Description (continued)
Error condition Display Reason Remedy
Battery is flat
after short time
Battery has low
capacity
Change battery
Battery is not
being charged
during daytime
No up-
moving
bars
Solar array
faulty or wrong
polarity
Check Solar array
and wiring
Battery wrong
polarity
Permanent
sound
Battery is
connected with
reverse polarity
Remove reverse
polarity
Controller is
thermally
overloaded
Mount controller
at a location with
better ventilation
Controller limits
solar current
Solar array
exceeds
nominal current
of controller.
Check solar array
current.
Programming your CX
You enter the programming mode with a long push on the button.
The programming menu structure is described in the right column.
Mind that once you have entered the programming menu you can exit
it at the last item only.
We therefore recommend that you first note down your required
settings in the check boxes beside the menu structure and then do the
programming in one go. This makes programming easier and avoids
errors.
All programming settings are stored in a non-volatile memory and
remain stored even if the controller was disconnected from the battery.
If you want to reset the controller to the factory settings, choose
Programming Menu 9.
Programming lock-out
By pushing the button for 8 sec in normal operation mode the pro-
gramming lock-out is activated to prevent any accidental settings
change. Another 8 sec push releases the lock-out.
General Safety and Usage Recommendations
Intended Use
The charge regulator is intended for use in photovoltaic systems with 12
V or 24 V nominal voltage. It shall be used with vented or sealed (VRLA)
lead acid batteries only.
Safety Recommendations
§ Batteries store a large amount of energy. Never short circuit a battery
under all circumstances. We recommend connecting a fuse (slow
acting type, according to the nominal regulator current) directly to
the battery terminal.
§ Batteries can produce flammable gases. Avoid making sparks, using
fire or any naked flame. Make sure that the battery room is ventilated.
§ Avoid touching or short circuiting wires or terminals. Be aware that the
voltages on specific terminals or wires can be up to double the bat-
tery voltage. Use isolated tools, stand on dry ground and keep your
hands dry.
§ Keep children away from batteries and the charge regulator.
§ Please observe the safety recommendations of the battery manufac-
turer. If in doubt, consult your dealer or installer.
Liability Exclusion
The manufacturer shall not be liable for damages, especially on the
battery, caused by use other than as intended or as mentioned in this
manual or if the recommendations of the battery manufacturer are
neglected. The manufacturer shall not be liable if there has been
service or repair carried out by any unauthorised person, unusual use,
wrong installation, or bad system design.
Opening case voids warranty.
Technical Data
Nominal voltage 12 / 24 V, automatic recognition
Absorption voltage 14.4 / 28.8 V (25°C), 0.5-2h
Equalization voltage 14.8 / 29.6 V (25°C), 2 h
Float voltage 13.7 / 27.4 V (25°C)
Load disconnect volt-
age
11.0-12.2 / 22.0 -24.4 V depending on
setting
Load reconnect voltage
12.8 / 25.6 V
Temperature compen-
sation
-4 mV/cell*K
Max. solar panel current
10 / 20 / 40 A according to model number
@ 25°C (without load current at 50°C)
Max. load current 10 / 20 / 40 A according to model number
@ 25°C (without solar current at 50°C)
Dimensions 89 x 90 x 38 mm (w x h x d)
Weight CX10, CX20: 168 gr, CX40: 179gr
Max. wire size 16 mm² (AWG #6)
Self consumption 4 mA
Ambient temperature
range
-25 to + 50 °C
Case protection IP 22
Subject to change without notice. Version: CX060220
Made in one of the following countries: China – Germany
Phocos AG – Germany www.phocos.com
Battery type
liquid electrolyte
Programming Menu (flashing)Display MenuMain MenuState of Charge
Short push
< 1 Second
Long push
> 1 Second
Battery type
GEL (VRLA)
Low voltage disconnect
current compensated 11.4 - 11.9 V
Low voltage disconnect
current compensated 11.0 - 11.75 V
LVD current compensated /
adaptive 11.0 - 12.2 V
Low voltage disconnect 11.5 V
Low voltage disconnect 11.0 V
Nightlight function OFF
Nightlight function
DUSK TO DAWN
Nightlight function
EVENING/MORNING
Nightlight function
EVENING OFF
Nightlight function
MORNING OFF
Nightlight function
EVENING 1 HR
Nightlight function
MORNING 1 HR
Nightlight function
EVENING 2 HRS
Nightlight function
MORNING 2 HRS
Nightlight function
EVENING 3 HRS
Nightlight function
MORNING 3 HRS
Nightlight function
EVENING 4 HRS
Nightlight function
MORNING 4 HRS
Nightlight function
EVENING 5 HRS
Nightlight function
MORNING 5 HRS
Nightlight function EVENING
TO 4 HRS before mid of night
Nightlight function MORNING
FROM 2 HRS after mid of night
Nightlight function EVENING
TO 3 HRS before mid of night
Nightlight function MORNING
FROM 3 HRS after mid of night
Nightlight function EVENING
TO 2 HRS before mid of night
Nightlight function EVENING
TO 1 HR before mid of night
Nightlight function MORNING
FROM 4 HRS after mid of night
Nightlight function EVENING
TO mid of night
Nightlight function MORNING
FROM 5 HRS after mid of night
Nightlight function MORNING
FROM 6 HRS after mid of night
Buzzer OFF
Buzzer ON
Serial interface EXCESS ENERGY
& CURRENT DATA
Serial interface EXCESS ENERGY
& DATALOGGER
Serial interface BIDIRECTIONAL,
NO EXCESS ENERGY
Keep individual settings
Reset to factory preset
Your
Load on/off
Factory
Setting
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Day/Night threshold
1.0 / 2.0 V Solar voltage
Day/Night threshold
Solar voltage1.6 / 3.1 V
Day/Night threshold
Solar voltage2.1 / 4.2 V
Day/Night threshold
Solar voltage2.7 / 5.4 V
Day/Night threshold
Solar voltage3.2 / 6.5 V
Day/Night threshold
Solar voltage3.8 / 7.6 V
Day/Night threshold
Solar voltage4.4 / 8.8 V
Day/Night threshold
4.9 / 9.8 V Solarspannung
Day/Night threshold
Solar voltage5.5 / 11.0 V
Day/Night threshold
Solar voltage6.0 / 12.1 V
Day/Night threshold
Solar voltage6.6 / 13.2 V
Day/Night threshold
Solar voltage7.2 / 14.3 V
Day/Night threshold
Solar voltage7.7 / 15.4 V
Date of your
own settings:
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