SL2410/SL2420 Series Smart Solar Charge Controller
User Manual
1.
Main Features
1)
The design of IP68 waterproof level and aluminum shell helps effectively prevent erosion.
2)
12 V/24 V system voltage.
3)
LED numeric display and waterproof keys are easy to use.
4)
An upgraded 3-stage PWM charging algorithm applies an equalizing charge to the battery every week, effectively preventing
the battery from non-equalization and sulfuration and therefore extending the battery's service life.
5)
Up to 5 load working modes facilitate the product's application to different types of road lamps and monitoring devices.
6)
Charging program options are available for sealed, GEL and flooded lead-acid batteries and ternary-material lithium and
lithium iron phosphate batteries.
7)
An external temperature sensor helps deliver high-precision temperature compensation.
8)
Parameter settings of power-down saving functions eliminate the trouble of repeated settings, making operation easy and
convenient.
9)
Various kinds of state indicators.
10)
Overcharge, over-discharge and overload protection, as well as short-circuit and reverse-connection protection.
11)
TVS lighting protection.
2.
Installation and Wiring
1.
The controller shall be installed securely, and its dimensions are as follows:
External dimensions: 82×58×20 (mm)/ 2410; 82×100×20 (mm)/ 2420
Installation dimensions: 43×75 (mm)/ 2410; 82×75 (mm)/ 2420
Installation hole diameter: 3.5 (mm)
2.
The SL series controller can work under a system voltage of 12 V or 24 V. In actual practice, connect the battery first, and the
controller starts operation after automatically recognizing the battery voltage. For a 12 V system, the nixie tube displays "0. ".
For a 24 V system, the nixie tube displays "1. " and battery indicator lights up; otherwise, check whether the connection is
correct.
3.
Connect the solar panel's "+" and "-" poles. If sunlight is present, the solar panel indicator lights up; otherwise, check whether
the connection is correct.
4.
Connect the load's "+" and "-" poles. Connect the load leads to the controller's load output terminal, and the current shall not
exceed the controller's rated current.
The wiring is shown below:
3.
Usage Recommendations
1)
When the controller is powered on, it automatically recognizes the battery voltage. In practical use, connect the battery first,
and make sure the connection is sound and reliable.
2)
As the controller generates heat during operation, you are advised to install it in an environment with good ventilation
conditions.
3)
The controller measures the ambient temperature and makes compensation to battery charging based on the
measurement. As long as actual conditions permit, place the battery and the controller in the same environment.
4)
Choose cables with large enough capacity for connection, in case too much loss incurred on the lines causes the controller to
misjudge.
5)
The controller has a common positive pole inside. If grounding is needed, ground the positive pole.
6)
It's important to fully charge the battery regularly. At least one full charging in every month is recommended, and failure to
do that may cause permanent damage to the battery. Only when inflow energy outpaces outflow energy can the battery be
charged full. Users shall bear this in mind when configuring the system.
4.
State Indicators
LED Light
Indicated Item
State
Meaning
Charging
Steady on
Solar panel of voltage
Steady off
Solar panel of no voltage
Slow
flashing
Charging in process
Quick
flashing
System over voltage
Battery
Steady on
Normal battery function
Steady off
Battery not connected
Slow
flashing
Battery under voltage
Quick
flashing
Battery over discharged
Load
Steady on
Load turned on
Steady off
Load turned off
Slow
flashing
Overload protection
Quick
flashing
Short-circuit protection
5.
Mode Description and Settings Table
The SL2410/20 series controller has 5 working modes, and specific settings are listed in the table below.
1.
Pure light control (0)
: When sunlight disappears and light intensity drops to the starting point, the controller initiates a
10-minute delay to confirm the starting signal, and then switches on the load for operation according to parameter settings. When
sunlight emerges and light intensity reaches the starting point, the controller initiates a 10-minute delay to confirm the
shutting-down signal, and then shuts down the output to stop the load's operation.
2.
Light control + time control (1 to 4.)
:The starting process is the same as the pure light control. After operating for a preset
period of time (settable from 1 to 14 hours), the load turns off automatically.
3.
Manual mode (5.)
:
In this mode, the user can switch the load on or off by operating the keys, regardless of daytime or night.
This mode is designed for some specially purposed loads, and also used in the debugging process.
4.
Debugging mode (6.):
used for system debugging. With light signals, the load is shut off; without light signals, the load is
switched on. This mode enables fast check of the correctness of system installation during installation and debugging.
5.
Normal on mode (7.): The energized load keeps in output state, and this mode is suitable for loads which need 24-hour power
supply.
LED Display
Mode
LED Display
Mode
0
Pure light control
mode
9
Light c time
control (9 hours)
1
Light c time
control (1 hour)
0.
Light c time
control (10 hours)
2
Light c time
control (2 hours)
1.
Light c time
control (11 hours)
3
Light c time
control (3 hours)
2.
Light c time
control (12 hours)
4
Light c time
control (4 hours)
3.
Light c time
control (13 hours)
5
Light c time
control (5 hours)
4.
Light c time
control (14 hours)
6
Light c time
control (6 hours)
5.
Manual mode
7
Light c time
control (7 hours)
6.
Debugging mode
8
Light c time
control (8 hours)
7.
Normal on mode
6.
Setting Methods
Load working mode setting method:
Press the key for no less than 3s, and the nixie tube begins to flash, indicating that the system can be adjusted. Release the key and
every time you click it, the number displayed on the nixie tube changes to another. When the number becomes the one that
corresponds to the mode selected by the user, wait until the nixie tube stops flashing or press the key again for no less than 3s to
complete the setting.
Battery type setting method:
In the [5.] mode, press the key for 3s, and the nixie tube begins to flash. Release the key, and long press the key again. The three
LED lights and nixie tube begin to flash. Then, click the key to choose a battery type by the numeric value displayed on the nixie
tube. After that, long press the key. When the indicator lights stop flashing, the setting is complete and nixie tube exits to the [5.]
mode.
Nixie tube
Display
Battery Type
Nixie Tube
Display
Battery Type
1
Sealed lead-acid battery
5
4 strings of
ternary-material lithium
batteries
2
GEL lead-acid battery
6
7 strings of
ternary-material lithium
batteries
3
Flooded lead-acid battery
7
4 strings of lithium iron
phosphate batteries
4
3 strings of ternary-material
lithium batteries
8
8 strings of lithium iron
phosphate batteries
7.
Parameter Details
For the above parameters, the ambient temperature is 12 °C, the system voltage is 12 V, and the lithium battery
parameters are single-piece ones.
8.
Common Problems and Solutions
Symptoms
Causes and solutions
While sunlight is present, the solar panel
indicator does not light up.
Check whether the solar panel is correctly connected and contact is
good and reliable.
The solar panel charging indicator is
flashing quickly.
System overvoltage. Check whether the battery voltage is too high.
The solar panel indicator is off and
battery voltage is normal, but there is no
output.
The load will be switched on automatically after 10 minutes.
The battery indicator does not light up.
The battery may be failing to supply power. Check whether the
battery is correctly connected.
The battery indicator is flashing quickly,
The battery is over-discharged, and will recover when recharged
Battery type
Sealed
GEL
Flooded
Ternary-material
lithium
Lithium iron
phosphate
System current
10 A; 20 A
No-load loss
10 mA/ 12 V; 13 mA/ 24 V
Solar energy input
voltage
< 55 V
System voltage
12 V/ 24 V
Auto
12 V/ 24 V
Auto
12 V/ 24 V
Auto
3 and 4
strings: 12 V
system
7 strings: 24 V
system
4 strings: 12 V
system
8 strings: 24V
system
Overvoltage
protection
17.0 V
17.0 V
17.0 V
4.2 V * N +
2.0 V
3.65 V * N +
2.0 V
Equalizing charging
voltage
14.6 V
—
14.8 V
—
—
Boost
charging
voltage
14.4 V
14.2 V
14.6 V
—
—
Floating charging
voltage
13.8 V
13.8 V
13.8 V
—
—
Overcharge voltage
—
—
—
4.2 V * N
3.65 V * N
Overcharge recovery
—
—
—
3.9 V * N
3.4 V * N
Boost charging
recovery voltage
13.2 V
13.2 V
13.2 V
—
—
Over-discharge
recovery voltage
12.5 V
12.5 V
12.5 V
3.3 V * N
3.0 V * N
Undervoltage
12.0 V
12.0 V
12.0 V
3.2 V * N
2.8V * N
Over-discharge
voltage
11.0 V
11.0 V
11.0 V
3.0 V * N
2.5 V * N
Temperature
compensation
-4.0 mv/°C/ 2 V
—
—
Equalizing charging
duration
1 hour
—
1 hour
—
—
Boost charging
duration
4 hours
4 hours
4 hours
—
—
Light controlled
voltage
Light controlled on 5 V, light controlled off 6 V
Light control
judgment time
1 min
Overload and
short-circuit
protection
1.25 times of rated current: 30 s;
1.5 times of rated current: 5 s of overload protection;
Over 3 times of rated current: short-circuit protection.
Operating
temperature
-35°C to +65°C;
Protection degree
IP68
Weight
140 g (10 A) 300 g (20 A)
Dimensions
82×58×20 (mm)/ 10 A; 82×100×20 (mm)/ 20 A
(L×W×H)
