PV logic MPPT PRO User manual

User Manual
IMPORTANT:
PLEASE READ BEFORE FIRST USE
MPPT PRO
SOLAR CHARGER CONTROLLER
Covering
15A MPPT charger control 12v/24v DC
(STCC15M)

INSTALLATION AND OPERATION MANUAL
Specification Summary
• Nominalsystemvoltage:12/24VDC*
• MaximumPVinputvoltage:40VDC
*The controller will recognise the system rated voltage upon first
connection. If the battery voltage is lower than 16V, it will recognise the
system as 12V. If the battery voltage is greater than 16V, it will recognise
the system as 24V. You can charge a 12v battery from a panel rated from
15v up to 40v (VOC).
IMPORTANT SAFETY INFORMATION
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.
• Conrmthatpowerconnectionsaretightenedtoavoidexcessive
heating from loose connection.
General Information
• 12/24Vautomaticrecognition.
• EfcientMPPTcharging,algorithmincreasespowerfromsolarpanel
to battery by up to 20% and increases battery lifetime.
• Unique dual battery charging function.
• Bluetoothinterface.
• Reversecurrentprotection.
• OptionalRemotedisplay.
This controller is for off-grid solar systems and has the additional
functionality that it can charge two batteries simultaneously. The charging
process has been optimised 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.
This controller is designed to prioritise the battery connected to the
‘Battery 1’ connections first, before then allowing a charge to the battery
on the ‘Battery 2’ connections. In practice this means that battery 1
will be around 70% + charged before the controller will start charging
battery 2. It will then bring the batteries up evenly to a full charge.

Please note: If charging two batteries that are interconnected on the
same circuit (eg in parallel) only connect one battery to ‘Battery 1’ and
do not connect the second battery to ‘Battery 2’. Battery 2 connection
is only for charging a completely separate circuit with a battery on.
Forexampletheenginebatteryofamotorhome.
PRODUCT FEATURES
(1) Solar charging status
LED indicator
(2) Solar module terminals,
connect solar module
(3) Battery terminals,
connect to battery 1
(4) Battery terminals,
connect to battery 2
(5) Remote display connection.
INSTALLATION INSTRUCTIONS
NOTE: When mounting the
controller, ensure free air through
the controller heat sink (back plate).
There should be at least 6 inches
(150mm) of clearance above and
below the controller and 3 inches
(75mm) each side to allow for
cooling. If mounted in an enclosure,
ventilation is highly recommended.
WARNING: Risk of explosion!
Never install the controller in a sealed
enclosure along with batteries! Do
not install in a confined area where
battery gasses can accumulate.
1. Choose Mounting Location. Locate the controller on a vertical surface
protected from direct sun, high temperature and water.
2. Check for Clearance. Place the controller in the location where it will
bemounted.Verifythatthereissufcientroomtorunwiresandthat
there is sufficient room above and below the controller for air flow.
3. Mark and Drill Holes. Use a pencil or pen to mark the four mounting
hole locations on the mounting surface and drill pilot holes.
4. Secure Controller. Place the controller on the surface and align the
mounting holes with the drilled holes in step 3.
5. Secure the controller in place using self tapping screws
(not supplied).
(150mm)
(150mm)
(75mm) (75mm)
(1)
(2) (5) (3) (3)

WIRING
WARNING: Risk of explosion or fire! Never short circuit battery positive
(+) and negative (–).
WARNING: Risk of electric shock!Riskofelectricshock!Exercisecaution
when handling solar wiring. The solar module(s) high voltage output
can cause severe shock or injury. Cover the solar module(s) from the sun
before installing solar wiring.
When installing a fuse and holder, make sure that the distance between
the fuse holder and the positive terminal of battery is at most 150mm.
Only install a fuse holder when setting up. Do not insert a fuse at this time.
Thecontrollercanaccept12Vor24Vnominaloff-gridsolarmodule(s).
Solar connection
Connect the + and –
from the solar panel to
the solar inputs on the
charge controller.
Battery connection 2 (optional)
Connect the + and – from the 2nd
battery via a fuse (with fuse removed)
to the ‘Battery 2’ output on the
charge controller.
CHARGE CONTROLLER
SOLAR PANEL
CHARGE CONTROLLER
BATTERY
20 AMP
IN-LINE FUSE
(NOT PROVIDED)
Battery connection 1
Connect the + and – from
the 1st battery via a fuse
(with fuse removed) to the
‘Battery 1’ output on the
charge controller.
CHARGE CONTROLLER
BATTERIES
20 AMP
IN-LINE FUSE
(NOT PROVIDED)

Please note this battery must be on a separate electrical
circuit and not connected back to ‘Battery 1’ in anyway.
Once all connections are made please double-check the wiring.
Conrmcorrectpolarityateachconnection.Verifythatallfourorsix
(if a second battery is being charged) terminals are tightened and then
replace the fuse(s) back into the holders.
When battery power is applied, and the controller starts up, the battery
LED indicator will indicate as below.
OPERATION
Solar charging status indicator
• GREEN ON = Whenever sunlight is available for battery charging
and a battery is connected
• RED ON = Battery connected but no solar charge available / solar
panel connected and producing power, but no battery connected.
Connecting the MPPT Pro to your Bluetooth enabled device
1. Downloadandinstallthesoftware‘PVMobileSuite’fromapple
store for apple devices or the android store for android devices.
2. Once installed on your device open the App.
3. You will now be asked to select the controller
from a list of Bluetooth devices around you.
Please select ‘MPPT Pro’ (Fig 1).
NOTE: you will need to log in
each time you start up the App.
4. Your App will now connect to the
controller and show you this screen (Fig 2).
MPPT Pro App Icon
Fig 1 Fig 2
5. Clicking on the
Activity monitor
will give you this
screen (Fig 3
overleaf). This
screen gives you
information on
what your solar
system is doing as
well as the charge
in the batteries.
6. Clicking the back
arrow (top left) will
take you back to
the main screen. Fig 1 Fig 2

7. Battery Options screen (Fig 4) shows you all the settings currently
selected for your battery type. Please select the correct type from
Sealed – Gel – Flooded and press the ‘send’ button at the bottom.
This will send the settings and information to the controller.
8. To create a custom set of settings (do not do this unless you know all
yourbattery’ssettings)selectthecorrectSystemVoltageandpress
‘done’. Now click on the Custom tab and select the settings you
require. Once completed click the send button. Now go back to the
main screen (top left back arrow) select profiles, then select ‘save
current’ and give it a name. This will now save the custom settings
into the App (Fig 5).
9. Clicking on the Dashboard button will give you this screen (Fig 6).
This screen shows you a simple graphical display of the solar input
and battery status.
10. Clicking on the 3 lines (Fig 7) at the top left hand corner of the
home screen will bring up options. From here you are able to
change the language of the application.
Fig 3 Fig 4 Fig 5
Fig 6 Fig 7
TROUBLESHOOTING
• SolarchargingLEDindicatoroffduringdaytimewhensunshine
fallsonPVmodulesproperly.
 • PVarraydisconnected
 • CheckthatPVandbatterywireconnectionsarecorrectandtight.

NOTE: If the LED is off. Measure battery voltage with multi meter.
Atleast11Visneededtostartthecontroller.
NOTE: No charging status LED indicator with normal connection.
Measure the input voltage of solar module, the input voltage must
be higher than battery voltage!
TECHNICAL SPECIFICATIONS
The below information is based on a 12v / 24v Lead Acid battery
however can change depending on the type of battery being charged.
ACCESSORIES
MPPT Pro remote display (STCC15DIS)
Remote back lit LCD Display showing the current solar charging
status, battery status (both batteries) and changing current.
Includes a 5m cable that simply plugs into the bottom of the
MPPT Pro controller.
Nominal System Voltage 12/24VDC (automatic system voltage recognition)
Battery Voltage Range 11-36V
Rated Battery Current / Solar Current 15A
Self-consumption ≤24mA
Operating temperature -35oC to +55oC
Overall dimensions 150 x 85 x 40mm
Mounting hole size (in case) 3.8mm
Terminals 6mm2
Net weight 220g
Over Voltage Disconnect Voltage 16V/32V
Charging Limit Voltage 15.5V/31V
Equalize Charging Voltage 14.8V/29.6V
Float Charging Voltage 13.8/27.6V
CHARGE CONTROLLER REMOTE DISPLAY

WARRANTY
This Solar Charge Controller is supplied with a 24-month warranty.
Should a failure occur during this time Solar Technology International
Ltd will repair or replace any faulty part, at its discretion. Solar
Technology International Ltd does not accept liability for any 3rd party
damage how so ever caused, or any costs associated with the return
of faulty products. To make a warranty claim please telephone Solar
Technology International Ltd on [phone].
These warranty conditions in no way affect your statutory rights.
A full set of Solar Technology International Ltd terms and conditions
are available on request.
Solar Technology International Ltd
We are manufacturers of some of the world’s most advanced solar
energy products from solar toys to full scale industrial solar modules.
To find out more please visit www.solartechnology.co.uk
If you have any questions about this product or regarding these
instructions please contact the Solar Technology International
Technical Help Line on [phone] or alternatively please
write to: Solar Technology International Ltd, Unit 6, Station Drive,
Tewkesbury, Gloucestershire GL20 7HH, UK.
Solar Technology International Ltd.
Unit 6, Station Drive, Bredon, Gloucestershire GL20 7HH,
United Kingdom
Telephone: [phone] Fax: [phone]
E-mail: [e-mail]
Online: www.solartechnology.co.uk
Solar
TECHNOLOGY INTERNATIONAL