MPPT SPT-10A User manual

MMPT Solar Charger
Controller
SPT-10A / SPT-15A / SPT-20A
/ SPT-25A / SPT-30A / SPT-
35A / SPT-40A / SPT-45A
User Manual Uživatelský manuál
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Benutzerhandbuch

2
English
3 –33
Čeština
34 –64
Slovenčina
65 –95
Magyar
96 –126
Deutsch
127 –157

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Dear customer,
Thank you for purchasing our product. Please read the following instructions carefully
before first use and keep this user manual for future reference. Pay particular attention
to the safety instructions. If you have any questions or comments about the device,
please contact the customer line.
✉www.alza.co.uk/kontakt
✆[phone]
Importer Alza.cz a.s., Jankovcova 1522/53, Holešovice, 170 00 Praha 7, www.alza.cz

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Important Safety Instructions
Please reserve this manual for future review. This manual contains all instructions of
safety, installation and operation for Maximum Power Point Tracking (MPPT) controller
in series ("the controller" is referred in this manual).
General Safety Information
•Read carefully all the instructions and warnings in the manual before installation.
•No user serviceable component inside controller. DO NOT disassemble or
attempt to repair the controller.
•Mount the controller indoors. Prevent exposure to the elements and do not allow
water to enter the controller.
•Install the controller in well ventilated places, the controller's heat sink may
become very hot during operation.
•Suggested to install appropriate external fuses/breakers.
•Make sure switching off all connections with PV array and the fuse/breakers close
to battery before controller installation and adjustment.
•Power connections must remain tight to avoid excessive heating from a loose
connection.
General Information
Overview
Appreciate you for choosing MPPT solar charge controller, Tracer A series. Based on
common positive design and advanced MPPT control algorithm, with LCD displaying
running status, this product is artistic, economical and practical.
With MPPT control algorithm, in any situation, products of this series can fast and
accurately track out the best maximum power point (MPP) of photovoltaic array, in
order to obtain the maximum solar energy in time, which remarkably improves energy
efficiency. There is dual display function: local LCD panel and remote meter. With
Modbus communication protocol interface, it is convenient for customers to expand
applications and monitor in various fields like telecommunication base station,
household system, street lighting system, wilderness monitoring system, etc.
All-round electronic fault self-test function and enhanced electronic protection function
could furthest avoid damages on system components resulting from installation errors
or system failures.

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Feature:
•Advanced Maximum Power Point Tracking (MPPT) technology, with efficiency no
less than 99.5%.
•High quality components, perfecting system performance, with maximum
conversion efficiency of 98%.
•Ultra-fast tracking speed and guaranteed tracking efficiency.
•Accurately recognizing and tracking of multiple power points.
•Reliable automatic limit function of maximum PV input power, ensuring no
overload.
•Wide MPP operating voltage range.
•12/24VDC automatically identifying system voltage.
•LCD panel display design, dynamically displaying tool's operating data and
working
•condition.
•Multiple load control modes: manual mode, light ON/OFF, light On+Timer and
test mode.
•Support 3 charging pre-program options: Sealed, Gel, Flooded.
•Battery temperature compensation function.
•Real-time energy statistics function.
Characteristics
Figure 1-1 SPT Series Characteristics
Item
Name
Item
Name
1
Mounting hole size ф5
5
Battery terminals
2
Select Button
6
Load Terminals
3
RTS Port
7
Enter Button
4
PV terminals
8
LCD

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Explanations:
Connection for a RTS (Remote Temperature Sensor) to remotely detect battery
temperature.
Accessories Instructions
1) Remote Temperature Sensor (Model: RTS300R47K3.81A)
Acquisition of battery temperature for undertaking temperature compensation of
control parameters, the standard length of the cable is 3m (length can be customized).
The RTS300R47K3.81A connects to the port (3 ʰ) on the controller.
NOTE: Unplug the RTS, the temperature of battery will be set to a fixed value 25°C.
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 battery.
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:
Normally, the VMpp is always higher than VBat. Due to the principle of conversion 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.
Input power (PPV)- Output power (PBat)
Input voltage (VMpp)*input current (lps) =Battery voltage (VBat)*battery current (IBat)

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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.)
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:
Figure 1-3 Multi-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.

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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.
Figure 1-4 Battery changing 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.

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Equalize Charging
WARNING: Explosive Risk!
Equalizing flooded battery would 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.
CAUTION: 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.
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

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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.
Installation Instructions
General Installation Notes
• Before installation, please read through the entire installation instructions to get
familiar with the installation steps.
• 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.
• Explosive battery gases may come out from the battery during charging, so make sure
ventilation condition is good.
• Gel, Sealed or Flooded batteries are recommended, other kinds please refer to the
battery manufacturer.
• 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.
• 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.
• 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.
• 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.

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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) Ot the MPPT
controller, the series number of different types of PV modules can be calculated. The
below table is for reference only.
SPT-10A
System
voltage
36cell
Voc < 31V
48cell
Voc < 34V
54cell
Voc < 34V
60cell
Voc < 38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
2
2
1
1
1
1
1
1
24V
2
2
-
-
-
-
-
-
System
voltage
72cell
Voc < 46V
96cell
Voc < 62V
Thin-Film Module Voc>80V
Max.
Best
Max.
Best
12V
1
1
-
-
-
24V
1
1
-
-
-
SPT-10A/SPT-20A/SPT-30A/SPT-40A:
System
voltage
36cell
Voc < 31V
48cell
Voc < 34V
54cell
Voc < 34V
60cell
Voc < 38V
Max.
Best
Max.
Best
Max.
Best
Max.
Best
12V
2
2
1
1
1
1
1
1
24V
2
2
-
-
-
-
-
-
System
voltage
72cell
Voc < 46V
96cell
Voc < 62V
Thin-Film Module Voc>80V
Max.
Best
Max.
Best
12V
1
1
-
-
-
24V
1
1
-
-
-
NOTE: The above parameter values are calculated under standard test conditions (STC
(Standard Test Condition) Irradiance 1000W/m²› Module Temperature25°C › Air
Mass1.5.)

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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 a 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
WARNING: Controller will be damaged when the PV array straight polarity
and the actual operation power of the PV array is three times greater than
the rated charge power!
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!
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 to the table below:
Model
Maximum
charge
current
Maximum
charge
power
Maximum power of
photovoltaic array
Max. PV open
circuit voltage
SPT-10A
10A
130W/12V
260W/24V
390W/12V
780W/24V
92V1
100V2
SPT-15A
15A
195W/12V
390W/24V
576W/12V
1152W/24V
SPT-20A
20A
260W/12V
520W/24V
780W/12V
1560W/24V
SPT-25A
25A
325W/12V
650W/24V
936W/12V
1872W/24V
SPT-30A
30A
390W/12V
780W/24V
1170W/12V
2340W/24V
SPT-35A
35A
455W/12V
910W/24V
1296W/12V
2592W/24V
SPT-40A
40A
520W/12V
1040W/24V
1560W/12V
3120W/24V
SPT-45A
45A
585W/12V
1170W/24V
1656W/12V
3312W/24V
1 At 25°C environment temperature
2 At minimum operating environment temperature

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Wire Size
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 to the table as below:
Model
Max.PV input current
Max.PV wire
size(mm2/AWG)
SPT-10A
10A
4/12
SPT-15A
15A
SPT-20A
20A
6/10
SPT-25A
25A
SPT-30A
30A
10/8
SPT-35A
35A
SPT-40A
40A
16/6
SPT-45A
45A
NOTE: When the PV modules connect in series, the open circuit voltage of the PV array
must not exceed 46V or 92V (25°C)
Battery and Load Wire Size
The battery and load wire size must conform to the rated current, the reference size as
below:
Model
Max.PV input
current
Max
discharge
current
Battery wire
size
(mm²/AWG)
Max.PV wire
size(mm2/AWG)
SPT-10A
10A
10A
4/12
4/12
SPT-15A
15A
15A
SPT-20A
20A
20A
6/10
6/10
SPT-25A
25A
25A
SPT-30A
30A
30A
10/8
10/8
SPT-35A
35A
35A
SPT-40A
40A
40A
16/6
16/6
SPT-45A
45A
45A
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.

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Mounting
CAUTION: The controller requires at least 150mm of clearance 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 area where
battery gas can accumulate.
WARNING: Risk of explosion! Never install the controller in a sealed
enclose with flooded batteries! Do not install in a confined area where
battery gas can accumulate.
WARNING: 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.
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 instaIIation, power the controller and check the LCD on. 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 series is a positive ground controller. Any positive connection of solar, load or
battery can be earth grounded as required.

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Operation
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
Figure 3-1 LCD
Status Description
Item
Icon
Status
PV array
Day
Night
No charging
Charging
PV Voltage, Current, Power
Battery
Battery capacity, In
Charging
Battery Voltage, Current,
Temperature
Battery Type
Load
Load ON
Load OFF
Load Voltage, Current,
Load mode

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Fault Indication
Status
Icon
Description
Battery over discharged
Battery level shows empty, battery
frame blink, fault icon blink
Battery over voltage
Battery level shows full, battery frame
blink, fault icon blink
Battery over temperature
Battery level shows current value,
battery frame blink, fault icon blink
Load failure
Load overIoad1,Load short circuit
1 When load current reaches 1.02-1.05 times 1.05-1.25 times,1.25-1.35 times and 1.35-
1.5 times more than nominal vaIue, controIIer will automatically turn off loads in
50s,30s,10s and 2s respectively.
Browse interface
NOTE:
1) When no operation, the interface will be automatic cycIe, but the follow two
interfaces will not be displayed.
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.

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Parameters setting
Load mode setting
Set Load modes under below interface.
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.
Time 1
Time 2
Light ON/OFF
Disabled
Load will be on for 1 hour
since sunset
Load will be on for
1 hour before
sunrise
Load will be on for 2 hours
since sunset
Load will be on for
2 hours before
sunrise
Load will be on for 3~13
hours since sunset
Load will be on for
3~13 hours before
sunrise
Load will be on for 14 hours
since sunset
Load will be on for
14 hours before
sunrise
Load will be on for 15 hours
since sunset
Load will be on for
15 hours before
sunrise
Test mode
Disabled
Manual mode (Default load
ON)
Disabled
NOTE: Please set Light ON/OFF, Test mode and Manual mode via Timer1. Timer2 will be
disabled and dispIay “”.

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Battery Type
Operating Steps
Under Battery Voltage interface, Iong 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.
Battery type
1 Sealed (Default)
2 Gel
3 Flooded
Battery Voltage Parameters (parameters is in 12V system at 25°C please use
double value in 24V.)
Battery charging setting
Sealed
Gel
Flooded
User
Over Voltage Disconnect
Voltage
16.0V
16.0V
16.0V
9~17V
Charging Limit Voltage
15.0V
15.0V
15.0V
9~17V
Over Voltage Reconnect
Voltage
15.0V
15.0V
15.0V
9~17V
Equalize Charging
Voltage
14.6V
-
14.8V
Boost Charging Voltage
14.4V
14.2V
14.6V
9~17V
Float Charging Voltage
13.8V
13.8V
13.8V
9~17V
Boost Reconnect
Charging Voltage
13.2V
13.2V
13.2V
9~17V
Low Voltage Reconnect
Voltage
12.6V
12.6V
12.6V
9~17V
Under Voltage Warning
Reconnect Voltage
12.2V
12.2V
12.2V
9~17V
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

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NOTE:
1) When the battery type is sealed, gel, flooded, the adjusting range of equalize duration
is 0 to180min and boost duration is 10 to 180min
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 1
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.
Protections, Troubleshooting and Maintenance
Protection
• 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.
• 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.
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!
• 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

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When battery voltage reaches to the voltage set point of Over Voltage Disconnect, the
controller will stop charging the battery to protect the battery overcharge to break
down.
• Battery Over discharge
When battery voltage reaches 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.
• Battery Overheating
The controller detects 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.
• 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.
• 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.
• 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.
• 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.
• High Voltage Transients
PV is protected against small high voltage surge. In lightning prone areas, additional
external suppression is recommended.