Powertech MP3741 20A MPPT Solar Charge Controller Owner's Manual

POWERTECH
20A MPPT Solar Charge Controller
for Lithium or SLA Batteries
MP3741
User Manual
SAFETY INSTRUCTIONS
Please reserve this manual for future review. This manual contains all
instructions for safety, installation and operation for the product.
+ Read carefully all the instructions and warnings in the manual before
installation.
® No user serviceable component inside the product. DO NOT
disassemble or attempt to repair the controller.
e Mount the product indoors. Prevent exposure to the elements and do
not allow water to enter the product.
¢ Install the product in well ventilated places, the product's heat sink may
become very hot during operation.
e Suggested to install appropriate external fuses/breakers.
» Make sure switching off all connections with PV array and the fuse/
breakers close to battery before product installation and adjustment.
e Power connections must remain tight to avoid excessive heating from a
loose connection.
CONTENTS
1 General Information
1.1 Product Diagram 4
1.2 Features 4
1.3 Maximum Power Point Tracking Technology 5
1.4 Battery Charging Stage 7
2 Installation Instructions
2.1 General Installation Notes 10
2.2 PV Array Requirements 11
2.3 Wire Size 12
2.4 Mounting 13
3 Operation
3.1 LCD Display & Button Function 15
3.2 Fault Indication 16
3.3 Parameters Setting 17
4 Protections, Troubleshooting and Maintenance
4.1 Protection 21
4.2 Troubleshooting 23
4.3 Maintenance 24
5 Technical Specifications 25
Annex | Conversion Efficiency Curves 26
Annex Il Dimensions 27
1.1 PRODUCT DIAGRAM
23 4 #5
1. Select Button 4. Battery Terminals 7. LCD Display
2. RTS Port* 5. Load Terminals 8. Enter Button
3. PV Terminals 6. RS-485 Port* 9. Mounting Holes
* RTS Port: Connection for a Remote Temperature Sensor to remotely
detect battery temperature.
RS-485 Port: Monitor controller by PC, remote meter MT50 or APP and
update controller software via RS485 (RJ45 interface).
1.2 FEATURES
e Advanced MPPT control technology
e High tracking and conversion efficiency
+ Supports Sealed, Gel or flooded lead acid and Lithium batteries
e 3-stage intelligent charging
e Multiple load work modes
e Extensive electronic protection
e Backlit LCD display
e RS485 communication
4
1.3 MAXIMUM POWER POINT TRACKING TECHNOLOGY
Due to the nonlinear characteristics of solar array, there is a maximum
energy output point (Max Power Point) on its curve. Traditional
controllers, with switch charging technology and PWM charging
technology, can't charge the battery at the maximum power point, so
can't harvest the maximum energy available from PV array, but the
solar charge controller with Maximum Power Point Tracking (MPPT)
Technology can lock on the point to harvest the maximum energy and
deliver it to the baitery.
The MPPT algorithm of our company continuously compares and
adjusts the operating points to attempt to locate the maximum power
point of the array. The tracking process is fully automatic and does not
need user adjustment.
As the Figure 1-2, the curve is also the characteristic curve of the array,
the MPPT technology will ‘boost’ the battery charge current through
tracking the MPP. Assuming 100% conversion efficiency of the solar
system, in that way, the following formula is established:
Inputp ower (Ppy)= Output power (Peat)
Lb
| Inputv oltage (Vmpp)* inputc urrent (Ipy)= Battery voltage (Va.:)* batteryc urrent (IBat) |
Normally, the VMpp is always higher than VBat, Due to the principle of
conservation 4 of energy, the IBat is always higher than IPV. The greater
the discrepancy between VMpp &VBat, the greater the discrepancy
between IPV& IBat. The greater the discrepancy between array and
battery, the bigger reduction of the conversion efficiency of the system,
thus the controller's conversion efficiency is particularly important in the
PV system.
Figure 1-2 is the maximum power point curve, the shaded area is
charging range of traditional solar charge controller (PWM Charging
Mode), it can obviously diagnose that the MPPT mode can improve
the usage of the solar energy resource. According to our test, the
MPPT controller can raise 20%-30% efficiency compared to the PWM
controller. (Value may be fluctuant due to the influence of the ambient
circumstance and energy loss.)
28.0
"ая a a gm -- MPP
Member De LIT
22.0-
20.0-
18.0-
16,0- - -
14.0- Traditional
|
|
|
|
¡
12.0- Operating 1 \
|
|
|
|
|
|
Current [A]
10.0- Range
8.0-
6.0-
4.0-
2.0-
0.0- Mie i
0.0 5.0 10.0 15.0 20.0
Voltage [V]
Current Curve [a] Power Curve AN Actual Point a ®
Figure 1-2 Maximum Power Point Curve
In actual application, as shading from cloud, tree and snow, the panel
maybe appear Multi-MPP, but in actually there is only one real Maximum
Power Point. As the below Figure 1-3 shows:
Curren [A]
T T т 1 y 1 т т + y a= | т =
¿OL ¿5.0 100 15.0 40,0 45,0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0
Wolage У] Woltace [№]
Current Curve [a] Pone Curva e Actual Point a | | Current Cure pl Power Curve FSJ Actual Point Tu
| ]
Figure 1-3 Mutil-MPP Curve
If the program works improperly after appearing Multi-MPP, the system
will not work on the real max power point, which may waste most solar
energy resources and seriously affect the normal operation of the
system. The typical MPPT algorithm, designed by our company, can
track the real MPP quickly and accurately, improve the utilization rate of
the array and avoid the waste of resources.
1.4 BATTERY CHARGING STAGE
The controller has a 3 stages battery charging algorithm (Bulk Charging,
Constant Charging and Float Charging) for rapid, efficient, and safe
battery charging.
Voltage 1
Bulk Charging : Constant Charging . Floal Changing
Equalize : m O ef =
Boost yd
Battery A
Current
Duration Time: 2h
Range: 10-180min)
Cumutative Time. 3h
Figure 1-4 Battery changing stage Curve
A) Bulk Charging
In this stage, the battery voltage has not yet reached constant voltage
(Equalize or Boost Voltage), the controller operates in constant current
mode, delivering its maximum current to the batteries (MPPT Charging).
B) Constant Charging
When the battery voltage reaches the constant voltage setpoint, the
controller will start to operate in constant charging mode, this process
is no longer MPPT charging, and in the meantime the charging current
will drop gradually, the process is not the MPPT charging. The Constant
Charging has 2 stages, equalize and boost. These two stages are not
carried out constantly in a full charge process to avoid too much gas
precipitation or overheating of battery.
Boost Charging
The Boost stage maintain 2 hours in default, user can adjust the
constant time and preset value of boost voltage according to demand.
The stage is used to prevent heating and excessive battery gassing.
Equalise Charging
WARNING:
Explosive Risk! Equalizing flooded battery would
IN produce explosive gases, so well ventilation of battery box is
recommended.
CAUTION:
Equipment damage! Equalization may increase battery
voltage to the level that damages sensitive DC loads. Verify
that all load allowable input voltages are 11% greater than the
equalizing charging set point voltage.
A 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.
Some types of batteries benefit from equalizing charge on a regular
basis, which is able to stir electrolyte, balance battery voltage and
accomplish chemical reaction. Equalizing charge increases battery
voltage, higher than the standard complement voltage, which gasifies
the battery electrolyte.
The controller will equalize the battery on 28th each month. The
constant equalization period is 0-180 minutes. If the equalization
isn't accomplished in one-time, the equalization recharge time will be
accumulated until the set time is finished. 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.
NOTE:
1) Due to the influence of ambient circumstance or load working,
the battery voltage can’t be steady in constant voltage, controller
will accumulate and calculate the time of constant voltage working.
When the accumulated time reach to 3 hours, the charging mode
will turn to Float Charging.
2) If the controller time is not adjusted, the controller will equalize
charge battery once every month following the inner time.
C) Float Charging
After the Constant voltage stage, the controller will reduce charging
current to Float Voltage setpoint. This stage will have no more chemical
reactions and all the charge current transforms 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 the battery and prevent the gassing and 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 charging stage, loads are able to obtain almost all power from
solar panel. If loads exceed the power, the controller will no longer be
able to maintain battery voltage in Float charging stage. If the battery
voltage remains below the Recharge Voltage, the system will leave Float
charging stage and return to Bulk charging stage.
2.1 INSTALLATION INSTRUCTIONS
¢ Before installation, please read through the entire installation
instructions to get familiar with the installation steps.
e Be very careful when installing the batteries, especially flooded
lead-acid battery. Please wear eye protection, and have fresh water
available to wash and clean any contact with battery acid.
+ Keep the battery away from any metal objects, which may cause short
circuit of the battery.
e Explosive battery gases may come out from the battery during
charging, so make sure ventilation condition is good.
e Gel, Sealed or Flooded batteries are recommended, other kinds
please refer to the battery manufacturer.
e Ventilation is highly recommended if mounted in an enclosure. Never
install the controller in a sealed enclosure with flooded batteries!
Battery fumes from vented batteries will corrode and destroy the
controller circuits.
e Loose power connections and corroded wires may result in high heat
that can 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.
e 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.
e Multiple same models of controllers can be installed in parallel on the
same battery bank to achieve higher charging current. Each controller
must have its own solar module(s).
+ Select the system cables according to 5A/mm2 or less current density
in accordance with Article 690 of the National Electrical Code, NFPA
70.
10
2.2 PV ARRAY REQUIREMENTS
Serial connection (string) of PV modules
As the core component of PV system, controller could be suitable for
various types of PV modules and maximize converting solar energy into
electrical energy. According to the open circuit voltage (Voc) and the
maximum power point voltage (VMpp) of the MPPT controller, the series
number of different types PV modules can be calculated. The below
table is for reference only.
36cell 48cell 54cell 60cell
System Voc<23V Voc<31V Voc<34V Voc<38V
voltage
9 MAX. Best | MAX. | Best | MAX. Best |MAX. Best
12V 2 2 1 1 2 1
24V 3 2 2 2 2 2
72cell 96cell
System Voc<46V Voc<62V Thin-Film Module
voltage Voc>80V
MAX. Best MAX. Best
12V 2 1 1 1 1
24V 2 1 1 1 1
NOTE: The above parameter values are calculated under standard
test conditions (STC (Standard Test Condition): Irradiance 1000W/m2,
Module Temperature 25°C, Air Mass1.5.)
PV Array Maximum Power
This MPPT controller has a limiting function of charging current,
the charging current will be limited within rated range, therefore, the
controller will charge the battery with the rated charging power even if
the input power at the PV exceeds. The actual operation power of the
PV array conforms to the conditions below:
1) PV array actual power < controller rated charge power, the controller
charge battery at actual maximum power point.
2) PV array actual power > controller rated charge power, the controller
charge battery at rated power.
If the PV array higher than rated power, the charging time at rated power
to battery will be longer, more energy to battery yields.
11
WARNING:
Controller will be damaged when the PV array straight polarity
and the actual operation power of the PV array is three
IN times greater than the rated charge power! Controller will be
damaged when the PV array reverse polarity and the actual
operation power of the PV array is 1.5 times greater than the
rated charge power!
When the PV array straight polarity, the actual operation of the PV array
must NOT exceed three times of rated charge power; When the PV
array reverse polarity, the actual operation must NOT exceed 1.5 times.
For real application please refer below:
Rated Charge Current: 20A
Rated Charge Power: 260W/12V, 520W/24V
Max. PV Array Power: 780W/12V, 1560W/24V
Max. PV Open Circuit Voltage: 92V@25°C, 100V@ minimum
operating temp.
The wiring and installation methods must conform to all national and
local electrical code requirements.
PV Wire Size
Since PV array output can vary due to the PV module size, connection
method or sunlight angle, the minimum wire size can be calculated
by the Isc of PV array. Please refer to the value of Isc in PV module
specification. When the PV modules connect in series, the Isc is equal
to the PV module’s Isc. When the PV modules connect in parallel, the
Isc is equal to the sum of PV module's Isc. The Isc of PV array must not
exceed the maximum PV input current, please refer below:
Max. PV Input Current: 20A
Max. PV Wire Size (mm?/AWG): 6/10
NOTE: When the PV modules connect in series, the open circuit voltage
of the PV array must not exceed 92V (25°C).
12
Battery and Load Wire Size
The battery and load wire size must conform to the rated current, the
reference size as below:
Rated Charge Current: 20A
Rated Discharge Current: 20A
Battery Wire Size (mm2/AWG): 6/10
Load Wire Size (mm2/AWG): 6/10
NOTE: The wire size is only for reference. If there is a long distance
between the PV array and the controller or between the controller and
the battery, larger wires can be used to reduce the voltage drop and
improve performance.
2.4 MOUNTING
CAUTION:
The controller requires at least 150mm of clearance
A above and below for proper air flow. Ventilation is highly
recommended if mounted in an enclosure.
WARNING:
Risk of explosion! Never install the controller in a sealed
enclose with flooded batteries! Do not install in a confined
(À area where battery gas can accumulate.
Risk of electric shock! Exercise caution when handling solar
wiring. The solar PV array can produce open-circuit voltages
in excess of 100V when in sunlight. Pay more attention to it.
13
POWERTECH
12V or 24V
1) Connect components to the charge controller in the sequence as
shown above and pay much attention to the “+” and “-? Please don’t
turn on the fuse during the installation. When disconnecting the
system, the order will be reserved.
2) After installation, power the controller and check the LCD on. If it’s
not on, please refer to chapter 4. Always connect the battery first, in
order to allow the controller to recognize the system voltage.
3) The battery fuse should be installed as close to battery as possible.
The suggested distance is within 150mm.
4) The Tracer A series is a positive ground controller. Any positive
connection of solar, load or battery can be earth grounded as
required.
CAUTION:
Unplug the RTS, the temperature of battery will be set toa
fixed value 25 °C.
Please connect the inverter to the battery rather than to the
controller, if the inverter is necessary.
14
3.1 LCD DISPLAY & BUTTON FUNCTION
Button Function
SELECT Button: Browse interface, setting parameter
ENTER Button: Load ON/OFF, clear error, enter into set mode,
save data
LCD Display
{2»B» Y
РУ soc AkWh%
Barr Dre cece
Figure 3-1 LCD
Status Description
Item Icon Status
PV Array LF Day
Y Night
4 = No Charging
2) = Charging
PV PV Voltage, Current, Power
Battery = Battery Capacity, In Charging
BATT. Battery Voltage, Current, Temp.
BATT. TYPE Battery Type
Load © Load ON
© Load OFF
LOAD Load Voltage, Current, Load Mode
15
3.2 FAULT INDICATION
Status
Icon
Description
Battery over
discharged
a El
Battery level shows empty, battery
frame blink, fault icon blink
Battery over
voltage À
Battery level shows full, battery
frame blink, fault icon blink
Battery over
temperature | 4
Battery level shows current value,
battery frame blink, fault icon blink
Load failure
a Q
Load overload*, Load short circuit
* When load current reaches1.02-1.05 times 1.05-1.25 times, 1.25-
1.35 times and 1.35-1.5 times more than nominal value, controller will
automatically turn off loads in 50s, 30s,10s and 2s respectively.
Browse Interface
“Dr E» CS
Ñ 398,
4
OS
LOAD HH 5
4
47 » E» ©:
= «SC
4
“Dr Dec =
oo 990“
16
“Dr E» Y Dr El» y:
” 33° 894”
y
"Dr E)» ©:
Bart i 38 у
y
“Hr E» Y
mar 40"
y
DE» DER
a ums = -.. Ib «
NOTE:
1) When no operation, the interface will be automatic cycle, but the
follow two interfaces not be display.
“Dr E)» ©:
LOAD TYRE a HH 5
“DD y» DEC!
LOAD TYPE (UE
2) Accumulative power zero clearing: Under PV power interface, press
ENTER button and hold on 5s then the value blink, press ENTER
button again to clear the value.
3) Setting temperature unit: Under battery temperature interface, press
ENTER button and hold on 5s to switch.
3.3 PARAMETERS SETTING
Load Mode Setting
Set Load modes under below interface.
“2D E)» ©:
"7 > E)» ©
HH LOAD TYPE cub
coro wee (LI
Operating Steps:
Under load mode setting interface, press ENTER button and hold on
5s till the number begin flashing, then press SELECT button to set the
parameter, press ENTER button to confirm.
ar Time 1 oe Time 2
(80 Light ON/OFF en Disabled
mu Load м illb e onfor1 hour ar Load will be on for 1 hour
us since sunset un before sunrise
iris Load willbe onfor2 hours и Load will be on for 2 hours
m since sunset -ы- before sunrise
Ta a Load will be on for 3-13 hours 202.213 Load willbe on for 3 13
since sunset hours before sunrise
co Load willbe on for 14 hours Sm Load w illb e onf or1 4
os since sunset Lo hours before sunrise
Mz Load will be on for 15 hours sec Load w illb e onfor1 5
u since sunset -‘- hours before sunrise
UE Test mode en Disabled
7 N mode(Default I oad an Disabled
17
NOTE:
Please set Light ON/OFF, Test mode and Manual mode via Timer.
Timer2 will be disabled and display = *
Setting the battery parameters by PC software
Connect the controller's RJ45 interface to the PC's USB interface via a
USB to RS485 cable (model: CC-USB-RS485-150U). When selecting
the battery type as "USE," set the battery voltage parameters by the
PC software. Refer to the cloud platform manual for detail.
RJ45 USB PC
in =
Setting the battery parameters by APP
Connect the controller to the WIFI module through a standard network
cable or connect to the Bluetooth module by Bluetooth signal.
When selecting the battery type as "USE," set the battery voltage
parameters by the APP. Refer to the cloud APP manual for details.
RJ45
eBox-BLE-01
Setting the battery parameters via the LCD
Step 1: On the battery voltage interface, press and hold the ENTER
button to enter the battery type interface.
Step 2: Press the SELECT button to change the battery type, such as
selecting the “GEL”; and then press the ENTER button to
confirm and back to the battery voltage interface automatically.
Step 3: On the battery voltage interface, press and hold the ENTER
button to enter the battery type interface again.
18
Step 4: Press the SELECT button to change the battery type to the
“USE”. Under the "USE" battery type, the battery parameters
that can be set via the LCD are shown in the table below:
Parameters Default Range Operation Steps
1) Under the" USE" interface, press the ENTER
button to enter the “SYS” interface.
12/24 2) Press the ENTER button again to display the
SYSk 12VDC current “SYS” value.
VDC 3) Press the SELECT button to modify the parameter.
4) Press the ENTER button to confirm and enter the
next parameter.
5) Press the ENTER button again to display the
BCV 14.4V 9-17V current voltage value.
FCV 13.8V 9-17V 6) Press the SELECT button to modify the parameter
(short press to increase 0.1V, long press to
LVR 12.6V 9-17V decrease 0.1V).
7) Press the ENTER button to confirm and enter the
LVD 11.1V 9-17V next parameter.
Press the SELECT button to modify the switch status.
LEN NO YES/NO Note: It exists automatically from the current
interface after no operation of more than 10S.
*The SYS value can only be modified under the non-lithium "USE"
type. That is, the battery type is Sealed, Gel, or Flooded before
entering the "USE" type, the SYS value can be modified; if it is lithium
battery type before entering the "USE" type, the SYS value cannot be
modified. Only the above battery parameters can be set on the local
controller, and the remaining battery parameters follow the following
logic (the voltage level of 12V system is 1, the voltage level of 24V
system is 2).
3.4 BATTERY TYPE
Operating Steps
Under Battery Voltage interface, long press ENTER button enter into
the interface of Battery type setting. After choosing the battery type by
pressing SELECT button, waiting for 5 seconds or pressing ENTER
button again to modify successfully.
19
Battery Type
m GEL
DE Ad
Sealed
*D BA
*7» 9
um EL
ET EE
Gel
DA DEE
m El of m GE
Flooded User
Battery Voltage Parameters (parameters is in 12V system at 25°C,
please use double value in 24V.)
Battery charging Sealed Gel Flooded User
setting
Over Voltage Disconnect 16.0V 16.0V 16.0V 9-17V
Voltage
Charging Limit Voltage 15.0V 15.0V 15.0V 9-17V
Over Voltage Reconnect | 45 qy | 15.00 | 150v | 9-17\
Voltage
Equalise Charging 14.6V - 148V | 9-17V
Voltage
Boost Charging Voltage 14.4V 14.2V 14.6V 9~17V
Float Charging Voltage 13.8V 13.8V 13.8V 9~17V
Boost Reconnect 13.2V | 13.2v | 132v | 9-17v
Charging Voltage
Low Voltage Reconnect | 126у | 1264 | 126v | 9-17\
Voltage
Under Voltage Warning | mov | 12.2v | 1224 | 9-17v
Reconnect Voltage
Under Volt. Warning Volt. 12.0V 12.0V 12.0V 9-17V
Low Volt. Disconnect Volt. | 11.1V 11.1V 11.1V 9~17V
Discharging Limit Voltage | 10.6V 10.6V 10.6V 9~17V
Equalize Duration (min.) 120 - 120 0~180
Boost Duration (min.) 120 120 120 10~180
20
NOTE:
1) When the battery type is sealed, gel, flooded, the adjusting range of
equalize duration is 0 to180min and boost duration is 10 to180min.
2) The following rules must be observed when modifying the parameters
value in user battery type (factory default value is the same as sealed
type):
a. Over Voltage Disconnect Voltage > Charging Limit Voltage > Equalize
Charging Voltage > Boost Charging Voltage > Float Charging Voltage
> Boost Reconnect Charging Voltage.
b. Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage
c. Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage >
Discharging Limit Voltage.
d. Under Voltage Warning Reconnect Voltage > Under Voltage Warning
Voltage = Discharging Limit Voltage.
e. Boost Reconnect Charging voltage > Low Voltage Disconnect Voltage.
CAUTION:
Please refer to user guide or contact with the sales for the
detail of setting operation.
Lithium Battery voltage parameters
. LFP LNCM
Battery charging -
setting LFP4S | LFP8S | LCNM | LCNM | LCNM | User
3$ 6$ 7$
Over Voltage 14.8V |296V 1128V |25.6V |29.8V | 9-17V
Disconnect Voltage
Charging Limit Voltage | 14.6 V |29.2\ 1126V 125.2V |294V | 9-17V
Over Voltage 146V |29.2V [125V |25.0V | 29.1 V | 9-17V
Reconnect Voltage
Equalize Charging 145V |290V 112.5V 125.0V |29.1V |9-17V
Voltage
Boost Charging 145V |290V [125V |25.0V | 29.1 V | 9-17V
Voltage
Float Charging Voltage | 13.8 V |27.6\У |12.2V 1244V | 28.4 V |9-17V
Boost Reconnect 13.2V 126.4V |121V 1242V 128.2V |9-17V
Charging Voltage
Low Voltage 12.8V |256V |10.5\У [| 21.0V 124.5V |9-17V
Reconnect Voltage
21
Under Voltage Warning | 12.2 VW |24.4V |12.2V |24.4\У [28.4 V | 9-17V
Reconnect Voltage
Under Voltage Warning | 12.0 V |24.0\У |10.5V 121.0V [24.5V | 9-17V
Voltage
Low Voltage 11.1V |222V 193V 18.6 V [21.7 V | 9-17V
Disconnect Voltage
Discharging Limit 110V |220V 193V 18.6 V |21.7 V | 9-17V
Voltage
NOTE:
*The battery parameters under the “User” battery type is 9-17V for LFP4S.
They should x2 for LFP8S.
+ When the battery type is "USE," the Lithium battery voltage
parameters follow the following logic:
a. Over Voltage Disconnect Voltage>Over Charging Protection Voltage
(Protection Circuit Modules(BMS) +0.2V;
b. Over Voltage Disconnect Voltage>Over Voltage Reconnect Voltage
=Charging Limit Voltage 2 Equalize Charging Voltage= Boost Charging
Voltage 2 Float Charging Voltage> Boost Reconnect Charging Voltage;
c. Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage
2 Discharging Limit Voltage.
d. Under Voltage Warning Reconnect Voltage>Under Voltage Warning
Voltage2 Discharging Limit Voltage;
e. Boost Reconnect Charging voltage> Low Voltage Reconnect Voltage;
. Low Voltage Disconnect Voltage 2 Over Discharging Protection Voltage
(BMS)+0.2V
4.1 PROTECTION
e PV Over Current: The controller will limit charge power in rated charge
power. An over-sized PV array will not operate at maximum power
point.
e PV Short Circuit: When PV short circuit occurs, the controller will stop
charging. Clear it to resume normal operation.
+ PV Reverse Polarity: Fully protection against PV reverse polarity, no
damage to the controller will result. Correct the miswire to resume
normal operation.
—h
WARNING: Controller will be damaged when the PV array reverse
polarity and the actual operation power of the PV array is
1.5 times greater than the rated charge power!
22
» Battery Reverse Polarity: Fully protection against battery reverse
polarity, no damage to the controller will result. Correct the miswire to
resume normal operation.
» Battery Over voltage: When battery voltage reach to the voltage set
point of Over Voltage Disconnect, the controller will stop charging the
battery to protect the battery overcharge to break down.
e Battery Over discharge: When battery voltage reach to the voltage set
point of Low Voltage Disconnect , the controller will stop discharging
the battery to protect the battery over discharged to break down.
e Battery Overheating: The controller detect the battery temperature
through the external temperature sensor. If the battery temperature
exceeds 65°C, the controller will automatically start the overheating
protection to stop working and recover below 55 °C.
e Load Overload: If the load current exceeds the maximum load current
rating 1.05 times, the controller will disconnect the load. Overloading
must be cleared up through reducing the load and restarting controller.
e Load Short Circuit: Fully protected against load wiring short-circuit.
Once the load shorts (more than quadruple rate current), the load
short protection will start automatically. After five automatic load
reconnect attempts, the fault must be cleared by restarting controller.
e Damaged Remote Temperature Sensor: If the temperature sensor
is short-circuited or damaged, the controller will be charging or
discharging at the default temperature 25°C to prevent the battery
damaged from overcharging or over discharged.
e Controller Overheating: If the temperature of the controller heat sinks
exceeds 85°C, the controller will automatically start the overheating
protection and recover below 75°C.
e High Voltage Transients: PV is protected against small high voltage
surge. In lightning prone areas, additional external suppression is
recommended.
23
4.2 TROUBLESHOOTING
Faults Possible Rea- Troubleshooting
sons
The LCD is off PV array Confirm that PV and battery
during daytime
when sunshine falls
on PV modules
properly
disconnection
wire connections are correct
and tight
Wire connection is
correct, LCD not
display
Battery voltage is
lower than 9V
Please check the voltage of
battery. At least 9V voltage to
activate the controller
à |=
Interface blink
Battery voltage
higher than over
voltage discon-
nect
Check if the battery voltage
is
too high, and disconnect the
solar module
voltage(OVD)
ES Battery under Load output is normal,
À voltage charging LED indicator will
Interface blink return to green automatically
when fully charged
= Battery low The controller will cut off the
AE voltage output automatically, LED
Interface blink disconnect indicator will return to green
automatically when fully
charged
© Over load or Remove or reduce the load
A Short and press the button, the
Interface blink circuit controller will resume to
work
after 3 seconds
24
4.3 MAINTENANCE
The following inspections and maintenance tasks are recommended at
least two times per year for best performance.
e Make sure controller firmly installed in a clean and dry ambient.
e Make sure no block on air-flow around the controller. Clear up any dirt
and fragments on radiator.
e Check all the naked wires to make sure insulation is not damaged for
serious solarisation, frictional wear, dryness, insects or rats etc. Repair
or replace some wires if necessary.
e Tighten all the terminals. Inspect for loose, broken, or burnt wire
connections.
e Check and confirm that LCD is consistent with required. Pay attention
to any troubleshooting or error indication . Take corrective action if
necessary.
e Confirm that all the system components are ground connected tightly
and correctly.
e Confirm that all the terminals have no corrosion, insulation damaged,
high temperature or burnt/discolored sign, tighten terminal screws to
the suggested torque.
e Check for dirt, nesting insects and corrosion. If so, clear up in time.
e Check and confirm that lightning arrester is in good condition. Replace
a new one in time to avoid damaging of the controller and even other
equipmenis.
WARNING:
Risk of electric shock! Make sure that all the power is
VEN turned off before above operations, and then follow the
corresponding inspections and operations.
25
5. SPECIFICATIONS
Voltage: 12/24V, 20A
Max. PV Voltage: 100V
Max. PV Input Power: 260W (12V), 520W (24V)
Battery support:
Sealed, gel or flooded Lead-acid (9~17V/12V; 18~34V/24V)
LiFePO4 (12V/24V)
Li(NiCoMn)O2 (12V/24V)
Weight: 940g
Dimensions: 221(H) x 155(W) x 52(D)mm
Environmental Parameters:
LCD Temperature Range - -20°C ~ +70°C
Working Environment Temperature Range”: -25°C ~ +45°C
Storage Temperature Range: -35°C - +80°C
Humidity Range: <95% (N.C.)
Enclosure IP Rating: IP30
*Please operate controller at permitted ambient temperature. If over
permissible range, please derate capacity in service.
26
ANNEX I CONVERSION EFFICIENCY CURVES
Illumination Intensity: 1000W/m2 Temp: 25°C
Solar Module MPP Voltage(17V, 34V, 68V) / Nominal System
Voltage(12V)
12V Conversion Efficency Curves
99.00%
_ 97.00%
& Y A
= 95.00%
2 TB
2 93.00% yA — ==
. a
s — — 17
8 91.00%
2 u— TT O RE — 34V
$ 89.00%
Y — > 68\/
87.00% 7
85.00%
20W5 ow 100W 150W 200W 250W
Chagig Power (1)
1. Solar Module MPP Voltage(33V, 68) / Nominal System Voltage(24V)
24V Conversion Efficency Curves
99.00%
97.00% =
95.00%
93.00% T
91.00%
89.00% 7
L 4
87.00%
34V
Conversion Efficency(n%)
85.00%
20W
SOW
100W
150W
200W
250W
300W
350W
400W
450W
500W
550W
Chagig Power W)
27
ANNEX II DIMENSIONS
134
f y
q DOBDOE | N
= NIIT |
air x г ^
A| ik
| |
) Г
/ \ ES
1 O © \ |
À. 5 L—
AIR J т
Ps. Le
145
28
29
30
31
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TechBrands by Electus Distribution Pty. Ltd.
320 Victoria Rd, Rydalmere
NSW 2116 Australia
Ph: 1300 738 555
Intl: +61 2 8832 3200
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