EP Solar LS1024 User manual

LS1024 / LS1524 / LS2024
—— Solar Charge Controller
Thank you very much for selecting our product!
This manual offers important information and suggestions
with respect to installation, use and troubleshooting, etc.
Please read this manual carefully before using the product
and pay attention to the safety recommendations in it.
EPSOLAR
INSTRUCTION
MANUAL
☆Design patent NO.：
201130028317.3

LS1024 / LS1524 / LS2024
—— Solar Charge Controller
Specification Summary
Nominal system voltage 12 / 24VDC*
Maximum PV input voltage 50V
Nominal charge / discharge current
LS1024 10A
LS1524 15A
LS2024 20A
* The controller will recognize the system rated voltage when start up. If
the battery voltage is lower than 18V, it will recognize the system as 12V.
If the battery voltage is greater than 18V, it will recognize the system as
24V.
LandStar

Contents
1 Important Safety Information................................... 1
2 General Information................................................. 2
2.1 Product Overview....................................... 2
2.2 Product Features......................................... 3
3 Installation Instructions............................................ 4
3.1 General Installation Notes .......................... 4
3.3 Wiring ........................................................ 6
4 Operation................................................................ 10
4.1 PWM Technology (Series Pulse Width
Modulation).................................................... 10
4.2 Battery Charging Information................... 10
4.3 LED Indicators......................................... 12
4.4 Setting Operation...................................... 14
5 Protection, Troubleshooting and Maintenance........ 15
5.1 Protection ................................................. 15
5.2 Troubleshooting........................................ 16
5.3 Maintenance............................................. 18
6 Warranty ................................................................ 19
7 Technical specifications ......................................... 20
Annex: Mechanical dimensions................................. 23

1
1 Important Safety Information
Save These Instructions
This manual contains important safety, installation and operating instructions
The following symbols are used throughout this manual to indicate
potentially dangerous conditions or mark important safety instructions，
please take care when meeting these symbols.
WARNING: Indicates a potentially dangerous
condition. Use extreme caution when
performing this task.
CAUTION: Indicates a critical procedure for
safe and proper operation of the controller.
NOTE: Indicates a procedure or function that
is important for the safe and proper operation
of the controller.
General Safety Information
Read all of the instructions and cautions in the manual before beginning
installation.
There are no user serviceable parts inside the controller. Do not
disassemble or attempt to repair it.
Install external fuses/breakers as required.
Disconnect the solar module and fuse/breakers near to battery before
installing or adjusting the controller.
Do not allow water to enter the controller.
Confirm that power connections are tightened to avoid excessive heating
from loose connection.

2
2 General Information
2.1 Product Overview
Thank you for selecting LandStar series solar system controller that adopts
the most advanced digital technique and operates fully automatically. The
Pulse Width Modulation (PWM) battery charging can greatly increase the
lifetime of battery. It has various unique functions and quite easy to use, such
as:
12/24VDC automatic recognition of system voltage
High efficient Series PWM charging, increase the battery lifetime and
improve the solar system performance
Use MOSFET as electronic switch, without any mechanical switch
Gel, Sealed and Flooded battery type option
Adopt temperature compensation, correct the charging and discharging
parameters automatically and improve the battery lifetime
Electronic protection: Overheating, over charging, over discharging,
overload, and short circuit
Reverse protection: any combination of solar module and battery
The controller is for off-grid solar system, and protects the battery from
being over charged by the solar module and over discharged by the loads.
The charging process has been optimized for long battery life and improved
system performance. The comprehensive self-diagnostics and electronic
protection functions can prevent damage from installation mistakes or
system faults.
Though the controller is easy to operate and use, please take your time to
read this manual and become familiar with it. This will help you make full
use of all the functions and improve your solar PV system.

3
2.2 Product Features
Figure 2-1 Land Star characteristics
1 –Temperature Sensor
Measure ambient temperature and make temperature compensation for
charging and discharging.
2 –Charging status LED indicator
A LED indicator that shows charging status and also indicates when battery
voltage is higher than over voltage disconnec t v oltage.
3 –Battery status LED indicator
A LED indicator that shows battery status.
4 –Flooded battery indicator
The indicator will be on when select Flooded battery.
5 –Gel battery indicator
The indicator will be on when select Gel battery.
6 –Sealed battery indicator
The indicator will be on when select Sealed lead acid battery.
7 –Load status indicator
Display the load status.
8 –Setting button
Control the load ON / OFF and select the battery type.

4
9 –Solar Module Terminals
Connect solar modules.
10 –Battery Terminals
Connect batteries.
11 –Load Terminals
Connect loads.
3 Installation Instructions
3.1 General Installation Notes
Read through the entire installation section first before beginning installation.
Be very careful when working with batteries. Wear eye protection. Have
fresh water available to wash and clean any contact with battery acid.
Uses insulated tools and avoid placing metal objects near the batteries.
Explosive battery gasses may be present during charging. Be certain there
is sufficient ventilation to release the gasses.
Avoid direct sunlight and do not install in locations where water can enter
the controller.
Loose power connections and/or corroded wires may result in resistive
connections that melt wire insulation, burn surrounding materials, or even
cause fire. Ensure tight connections and use cable clamps to secure cables
and prevent them from swaying in mobile applications.
Use with Gel, Sealed or Flooded batteries only.
Battery connection may be wired to one battery or a bank of batteries. The
following instructions refer to a singular battery, but it is implied that the
battery connection can be made to either one battery or a group of
batteries in a battery bank.
Select the system cables according to 3.5A/mm2current density.
3.2 Mounting
NOTE: When mounting the controller, ensure free air
through the controller heat sink fins. There should be at
least 6 inches (150 mm) of clearance above and below the
controller to allow for cooling. If mounted in an
enclosure, ventilation is highly recommended.

5
WARNING: Risk of explosion! Never install the
controller in a sealed enclose with flooded batteries! Do
not install in a confined area where battery gassed can
accumulate.
Step 1: Choose Mounting Location
Locate the controller on a vertical surface protected from direct sun, high
temperature, and water. And make sure good ventilation.
Step 2: Check for clearance
Place the controller in the location where it will be mounted. Verify that
there is sufficient room to run wires and that there is sufficient room above
and below the controller for air flow.
Figure 3-1 Mounting and cooling
Step 3: Mark Holes
Use a pencil or pen to mark the four (4) mounting hole locations on the
mounting surface.
Step 4: Drill Holes
Remove the controller and drill 4mm holes in the marked locations.
Step 5: Secure Controller
Place the controller on the surface and align the mounting holes with the
drilled holes in step 4.
Secure the controller in place using the mounting screws.
Warm air
Cool air
150mm(5.9inches)
150mm(5.9inches)

6
3.3 Wiring
NOTE: A recommended connection order has been
provided for maximum safety during installation.
NOTE: The controller is a common positive ground
controller.
CAUTION: Don’t connect the loads with surge power
exceeding the ratings of the controller.
CAUTION: For mobile applications, be sure to secure
all wiring. Use cable clamps to prevent cables from
swaying when the vehicle is in motion. Unsecured
cables create loose and resistive connections which may
lead to excessive heating and/or fire.
Step1: Battery Wiring
WARNING: Risk of explosion or fire! Never short
circuit battery positive (+) and negative (-) or cables
Figure 3-2 Battery connecting
Battery
150mm(5.9inches)
MAX
Fuse

7
Before battery is connected, make sure that battery voltage is greater than 6V
so as to start up the controller. If system is 24V, make sure battery voltage is
not less than 18V. System voltage can only be automatically recognized
when controller start up for the first time.
When install fuse, make sure that the biggest distance between the fuse
holder and the positive terminal of battery is 150mm. Do not insert a fuse at
this time. Confirm the connection correct and turn on the power.
Step 2: Load Wiring
The controller loads can be connected to such electrical equipments as lights,
pumps, motors and others. Controller offers power to loads through the
battery voltage.
Figure 3-3 Load Wiring
Connect the positive (+) and negative (-) of loads to controller load terminals
as shown in Figure 3-3. The load terminal may exist voltage, connect
carefully to avoid short circuit.
An in-line fuse holder should be wired in series in the load positive (+) or
negative (-) wire as show in Figure 3-3. Do not insert a fuse at this time.
Confirm the connection correct and turn on the power.
Fuse
Load

8
If wiring the load connection to a load distribution panel, each load circuit
should be fused separately. The total load draw should not exceed the load
rated current of controller.
Step 3: Solar wiring
WARNING: Risk of electric shock! Exercise caution
when handling solar wiring. The solar module(s) high
voltage output can cause severe shock or injury. Be
careful operation when installing solar wiring.
The controller can accept12V, 24V nominal off-grid solar module(s).
Grid-tie solar module(s) may be used if the open circuit voltage of solar
module doesn’t exceed the Maximum PV input voltage of the controller.
The solar module(s) work voltage must be equal to or greater than the
system voltage.
Figure 3-4 Solar wiring
Solar Module

9
Step 4: Confirm Wiring
Double-check the wiring in step1 through 3. Confirm correct polarity at each
connection. Verify that all six terminals are tightened.
Figure 3-5 System wiring review
Step 5: Confirm power on
When battery power is applied and the controller starts up, the battery LED
indicator will be green.
If the controller doesn't start up, or the battery status LED error exists, please
refer to section 5 for troubleshooting.
Solar Module
Fuse
Load
Fuse
150mm(5.9inches)
MAX
Battery

10
4 Operation
4.1 PWM Technology (Series Pulse Width Modulation)
The controller adopts the advanced series pulse width modulation (PWM)
charging mode. With range of 0 to 100%, it can charge the battery quickly
and stably under any condition of solar photovoltaic system.
PWM charging mode use automatic conversion duty ratio pulses current to
charge the battery. The battery can be fully charged safety and rapidly with
the pulse current. Intermissions make some oxygen and hydrogen generated
by chemical reaction chemically combined again and absorbed. It can
eliminate concentration polarization and ohm polarization naturally and
reduce the internal pressure of the battery so that the battery can absorb more
power. Pulse current charging mode makes battery have more time to react,
which reduces the gassing volume and makes battery improve the
acceptance rate of charging current.
4.2 Battery Charging Information
Figure 4-1 PWM Charging mode
·Bulk Charge
In this stage, the battery voltage has not yet reached boost voltage and 100%
of available solar power is used to charge the battery.
·Boost Charge
When the battery has recharged to the Boost voltage setpoint, constant-
current regulation is used to prevent heating and excessive battery gassing.
The Boost stage remains 120 minutes and then goes to Float Charge.

11
·Float Charge
After the battery is fully charged in Boost voltage stage, the controller
reduces the battery voltage to Float voltage set point. When the battery is
fully recharged, there will be no more chemical reactions and all the charge
current transmits into heat and gas at this time. Then the controller reduces
the voltage to the floating stage, charging with a smaller voltage and current.
It will reduce the temperature of battery and prevent the gassing, also
charging the battery slightly at the same time. The purpose of Float stage is
to offset the power consumption caused by self consumption and small loads
in the whole system, while maintaining full battery storage capacity.
In Float stage, loads can continue to draw power from the battery. In the
event that the system load(s) exceed the solar charge current, the controller
will no longer be able to maintain the battery at the Float setpoint. Should
the battery voltage remains below the boost reconnect charging voltage, the
controller will exit Float stage and return to Bulk charge.
·Equalize Charge
WARNING: Risk of explosion!
Equalizing flooded battery can produce explosive
gases, so well ventilation of battery box is necessary
NOTE: Equipment damage!
Equalization may increase battery voltage to the level
damaging to sensitive DC loads. Ensure that all load
allowable input voltages are greater than the equalizing
charging set point voltage.
NOTE: Equipment damage!
Over-charging and excessive gas precipitation may
damage the battery plates and activate material
shedding on them. Too high an equalizing charge or for
too long may cause damage. Please carefully review the
specific requirements of the battery used in the system.

12
Certain types of batteries benefit from periodic equalizing charge, which can
stir the electrolyte, balance battery voltage and complete chemical reaction.
Equalizing charge increases the battery voltage, higher than the standard
complement voltage, which gasifies the battery electrolyte.
If the battery is being over discharged, the solar controller will automatically
turn to equalize charging stage, and the equalize stage remain 120mins.
Equalize charge and boost charge are not carried out constantly in a full
charge process to avoid too much gas precipitation or overheating of battery.
4.3 LED Indicators
Charging Status LED indicator Battery Status LED indicator
Figure 4-2 LED indicators
Charging Status indicator
GREEN ON whenever sunlight is available for battery charging,
GREEN FAST FLASHING when battery over voltage.
Please refer to section 5 for troubleshooting.
Charging Status LED indicator Table 4-1
Color
Indicator
Charging Status
Green
On Solid
Charging
Green
Fast Flashing
Battery over voltage

13
Battery Status indicator
GREEN ON when battery voltage in normal range
GREEN SLOWLY FLASHING when battery full
ORANGE ON when battery under voltage
RED ON when battery over discharged
Please refer to section 5 for troubleshooting.
Battery status LED indicator Table 4-2
Color
Indicator
Battery Status
Green
On solid
Normal
Green
Slowly Flashing
Full
Orange
On solid
Under voltage
Red
On solid
Over discharged
Load status indicator
When the load current is 1.25times of rated current for 60 seconds, or
the load current is 1.5 times of rated current for 5 seconds (overload); or load
current is more than 3.5 times of rated current(Short Circuit) ,the load
status indictor will be red and flashing. Please refer to section 5 for trouble
shooting.
Load status indicator Table 4-3
Color
indictor
Load status
Red
flashing
Overload or short circuit
Overheating protection indicator
When heat sink of the controller exceeds 85 ℃, the controller will
automatically cut input and output circuit, Sealed, Gel, Flooded indicator
will be red and flashing simultaneously. Please refer to section 5 for trouble
shooting.
Overheating protection indicator Table 4-4
Color
indictor
System status
Red
Sealed、Gel、Flooded flashing
simultaneously
Controller
overheating

14
4.4 Setting Operation
Sealed Setting indicator Load Status LED indicator
Figure 4-3 Setting operation indicating
·Load Work Mode Setting
When the controller is powered on, press the setting button to control the
load output. Press the button once, the ON/OFF status will be changed
corresponding.
·Battery Type Setting
Press the setting button for more than 5 seconds, the original battery
type indicator will be flashing. Then press the setting button to choose
Sealed, Gel, and Flooded battery type. The setting is finished till the digital
tube stop flashing.
Battery type selection Table4-5
Battery type
LED indicator
Sealed lead acid battery
Sealed
Gel battery
Gel
Flooded battery
Flooded
Gel
Setting indicator
Flooded
Setting Indicator
Setting button

15
5 Protection, Troubleshooting and
Maintenance
5.1 Protection
·PV Array Short Circuit
If PV array short circuit occurs, clear it to resume normal operation.
·Load Overload
If the load current exceeds the maximum load current rating, the controller
will disconnect the load. Overloading must be cleared up through reapply
power or pressing the setting button.
·Load Short Circuit
Fully protected against load wiring short-circuit. After one automatic load
reconnect attempt, the fault must be cleared by reapply power or pressing the
setting switch.
·PV Reverse Polarity
Fully protection against PV reverse polarity, no damage to the controller will
result. Correct the miswire to resume normal operation.
·Battery Reverse Polarity
Fully protection against battery reverse polarity, no damage to the controller
will result. Correct the miswire to resume normal operation.
·Damaged Local Temperature Sensor
If the temperature sensor short-circuited or damaged, the controller will be
charging or discharging at the default temperature 25℃to prevent the
battery damaged from overcharging or over discharged.
·Overheating Protection
If the temperature of the controller heat sink exceeds 85C, the controller
will automatically start the overheating protection.
·High Voltage Transients
PV is protected against high voltage transients. In lightning prone areas,
additional external suppression is recommended.

16
5.2 Troubleshooting
Trouble Shooting Table 5-1
Faults
Possible reasons
Troubleshooting
Charging LED
indicator off
during daytime
when sunshine
falls on PV
modules
properly.
PV
array
disconnection
Check that PV and battery
wire connections are correct
and tight.
Green charging
LED indicator
fast flashing
Battery voltage
higher than over
voltage disconnect
voltage(OVD)
Check if battery voltage
over high. Disconnect the
solar module
Battery
LED indicators
orange
Battery under
voltage
Load output is normal,
charging LED indicator will
return to green
automatically when fully
charged.
Battery LED
indicators RED
color and loads
not working.
Battery
over discharged
The controller cut off the
output automatically, LED
indicator will return to
green automatically when
fully charged.
Load status
indictor red and
flashing
Over load or short
circuit
Overload: reduce the load
and press the button once,
the controller will resume
to work after 3s;
Short circuit: when the first
short-circuit occurs, the
controller will
automatically resume to
work after 10s; when a
second short-circuit occurs,
press the button, the
controller will resume to
work after 3s.