Srne SL2410 User Manual

SL2410/SL2420 Series Smart Solar Charge Controller
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
Charging
Battery
Load
5. Mode Description and Settings Table
User Manual
State Meaning
Steady on Solar panel of voltage
Steady off Solar panel of no voltage
Slow
Charging in process
flashing
Quick
System over voltage
flashing
Steady on Normal battery function
Steady off Battery not connected
Slow
Battery under voltage
flashing
Quick
Battery over discharged
flashing
Steady on Load turned on
Steady off Load turned off
Slow
Overload protection
flashing
Quick
Short-circuit protection
flashing
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
Pure light control
0
mode
Light control + time
1
control (1 hour)
Light control + time
2
control (2 hours)
Light control + time
3
control (3 hours)
Light control + time
4
control (4 hours)
Light control + time
5
control (5 hours)
Light control + time
6
control (6 hours)
Light control + time
7
control (7 hours)
Light control + time
8
control (8 hours)
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
Battery Type
Display
1 Sealed lead-acid battery
2 GEL lead-acid battery
3 Flooded lead-acid battery
3 strings of ternary-material
4
lithium batteries
7. Parameter Details
Battery type Sealed
System current
No-load loss
Solar energy input
voltage
12 V/ 24 V
System voltage
Auto
Overvoltage
17.0 V
protection
Equalizing charging
14.6 V
voltage
Boost charging
14.4 V
voltage
Floating charging
13.8 V 13.8 V
voltage
Overcharge voltage —
Overcharge recovery —
Boost charging
13.2 V
recovery voltage
Over-discharge
12.5 V
recovery voltage
Undervoltage 12.0 V
Over-discharge
11.0 V
voltage
Temperature -4.0 mv/°C/ 2 V
compensation
Equalizing charging
1 hour
duration
Boost charging
4 hours
duration
Light controlled
voltage
Light control
judgment time
Overload and
short-circuit 1.5 times of rated current: 5 s of overload protection;
protection Over 3 times of rated current: short-circuit protection.
Operating
temperature
Protection degree
Weight 140 g (10 A) 300 g (20 A)
Dimensions
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
While sunlight is present, the solar panel
indicator does not light up.
The solar panel charging indicator is
flashing quickly.
The solar panel indicator is off and
battery voltage is normal, but there is no
output.
The battery indicator does not light up.
The battery indicator is flashing quickly,
LED Display Mode
Light control + time
9
control (9 hours)
Light control + time
0.
control (10 hours)
Light control + time
1.
control (11 hours)
Light control + time
2.
control (12 hours)
Light control + time
3.
control (13 hours)
Light control + time
4.
control (14 hours)
5. Manual mode
6. Debugging mode
7. Normal on mode
Nixie Tube
Battery Type
Display
4 strings of
5 ternary-material lithium
batteries
7 strings of
6 ternary-material lithium
batteries
4 strings of lithium iron
7
phosphate batteries
8 strings of lithium iron
8
phosphate batteries
Ternary-material
GEL Flooded
lithium
10 A; 20 A
10 mA/ 12 V; 13 mA/ 24 V
< 55 V
3 and 4
strings: 12 V
12 V/ 24 V 12 V/ 24 V
system
Auto Auto
7 strings: 24 V
system
4.2 V * N +
17.0 V 17.0 V
2.0 V
— 14.8 V —
14.2 V 14.6 V —
13.8 V —
— — 4.2 V * N
— — 3.9 V * N
13.2 V 13.2 V —
12.5 V 12.5 V 3.3 V * N
12.0 V 12.0 V 3.2 V * N
11.0 V 11.0 V 3.0 V * N
—
— 1 hour —
4 hours 4 hours —
Light controlled on 5 V, light controlled off 6 V
1 min
1.25 times of rated current: 30 s;
-35°C to +65°C;
IP68
82×58×20 (mm)/ 10 A; 82×100×20 (mm)/ 20 A
(L×W×H)
Causes and solutions
Check whether the solar panel is correctly connected and contact is
good and reliable.
System overvoltage. Check whether the battery voltage is too high.
The load will be switched on automatically after 10 minutes.
The battery may be failing to supply power. Check whether the
battery is correctly connected.
The battery is over-discharged, and will recover when recharged
Lithium iron
phosphate
4 strings: 12 V
system
8 strings: 24V
system
3.65 V * N +
2.0 V
—
—
—
3.65 V * N
3.4 V * N
—
3.0 V * N
2.8V * N
2.5 V * N
—
—
—