Solar
Charge
Controller
MSK-10A
Owner's
Manual
Please read this
manual BEFORE
using your
Charge
Controller
OWNER'S MANUAL | Index
SECTION 1
Safety Instructions ................................................................. 3
SECTION 2
General Information, Features & Layout ............................... 5
SECTION 3
Installation ........................................................................... 7
SECTION 4
Operation ........................................................................ 13
SECTION 5
Protections & Troubleshooting ........................................... 22
SECTION 6
Specications ...................................................................... 26
SECTION 7
Warranty ........................................................................ 28
2 | SAMLEX AMERICA INC.
SECTION 1 | Safety Instructions
i
IMPORTANT SAFETY INSTRUCTIONS
PLEASE READ THE FOLLOWING SAFETY INSTRUCTIONS BEFORE USING THE CHARGE CONTROLLER.
FAILURE TO ABIDE BY THE RECOMMENDATIONS MAY CAUSE PERSONAL INJURY / DAMAGE TO THE
CONTROLLER.
The following safety symbols will be used in this manual to highlight safety
and information:
1. This Charge Controller is not waterproof (Ingress Protection Rating is IP-30). PLEASE
2. Ground the Negative of the battery as follows:
3. There are no user serviceable parts inside the controller. Do not disassemble or
4. Install external fuses / breakers as required.
5. Disconnect the PV Panel(s) and fuse / breakers near to battery before installing or
6. Conrm that power connections are tightened to avoid excessive heating from
7. The charge controller has been set to optimally charge 12V / 24V Lead Acid
8. Comply with battery manufacturer’s recommendations.
9. Avoid charging damaged, defective or old battery.
10. Ensure correct polarity is maintained when connecting the Charge Controller to the
11. When charging, removal of the battery from the vehicle is not necessary provided
WARNING!
Indicates possibility of physical harm to the user in case of non-compliance.
!
CAUTION!
Indicates possibility of damage to the equipment in case of non-compliance.
INFO
Indicates useful supplemental information.
WARNINGS
ENSURE THAT THE UNIT IS INSTALLED IN DRY, COOL AND WELL VENTILATED ENVIRONMENT.
• to Earth Ground in shore installations
• to Chassis Ground in Negative grounded mobile installations
attempt to repair it.
adjusting the controller.
loose connection.
Batteries (Sealed/AGM)
battery - Connect the Positive output terminal to the Positive Battery Post and the
Negative output terminal to the Negative Battery Post.
the battery is being charged in a well-ventilated area.
!
CAUTIONS!
SECTION 1 | Safety Instructions
12. Batteries contain very corrosive diluted Sulphuric Acid as electrolyte. Precautions
should be taken to prevent contact with skin, eyes or clothing. If battery acid
makes contact with skin or clothing, ush immediately with water. See a doctor
immediately.
13. Batteries generate Hydrogen and Oxygen during charging resulting in evolution of
explosive gas mixture in non-sealed batteries. Care should be taken to ventilate the
battery area when non-sealed batteries are used and follow battery manufacturer’s
recommendations.
14. Ensure there are no ammable substances, explosive gases, ames, smoke or spark
near the battery or the PV Panel(s).
15. Use caution to reduce the risk of dropping a metal tool on the battery. It could
spark or short circuit the battery or other electrical parts and could cause an
explosion.
16. Remove metal items like rings, bracelets and watches when working with batteries.
Batteries can produce a short circuit current high enough to weld a ring or the like
to metal and thus cause a severe burn.
17. If you need to remove a battery, always remove the ground terminal from the battery rst. Make sure that all the accessories are off so that you do not cause a spark.
18. PV Panel(s) generate electrical power when exposed to sunlight. Place a dark cover
over the panels when handling panels that have bare, un-insulated output wires.
Accidental shorting of panel terminals or wiring connected to the panels can result
in spark causing personal injury or a re hazard.
19. It is important that the battery gets fully charged frequently (at least once per
week). Otherwise, the battery can become permanently damaged due to under
charging. Partially charged batteries can quickly sulfate internally which is an irreversible condition. It is good practice to prevent a battery from being discharged
below 50%. Deeper discharging severely shortens battery life.
20. Keep the surface of PV Panel(s) clean from dust. Clean with a soft cloth. Do not
walk on the panels.
21. Installation and wiring must comply with the local and National Electrical Codes
and must be done by a certied electrician.
4 | SAMLEX AMERICA INC.
SECTION 2 | General Information, Features
& Layout
2.1 GENERAL INFORMATION
MSK-10A is a 10A rated, Series Type of PWM (Pulse Width Modulation) Charge Controller. It is based on an advanced design using a microcontroller for digital accuracy and
fully automatic operation. It can be used for 12V or 24V battery systems.
2.2 FEATURES
- Advanced microcontroller based, high performance design for digital accuracy and fully
automatic and intelligent operation
- Series Type PWM (Pulse Width Modulation) charging for low loss, higher efciency
charging and longer battery life
- Up to 50V Open Circuit Voltage (Voc) and up to 10A Short Circuit Current (Isc) of PV
Panel(s) - enables use of up to 150W of 12V Nominal panels for 12V battery and up to
300W, 24V Nominal panels for 24V Nominal battery.
- Dual voltage capability – can be used with 12V / 24V Nominal PV Panel(s) / batteries. 12V /
24V Nominal Battery System is detected automatically: Battery voltage < 18V is detected as
12V Nominal battery and >18V is detected as 24V Nominal battery
- 4 stages of charging for 100% return of capacity and for longer battery life
• Normal: Bulk Stage gAbsorption Stage gFloat Stage
• Once every 28 days or, if battery voltage drops to 11.1/22.2V: Bulk Stage gEqualization
Stage gFloat Stage
- Set for charging sealed/AGM Lead Acid Battery
- User friendly LED display for monitoring of operation and self diagnostics for
troubleshooting
- Integrated or optional external Temperature Sensor for temperature compensation to
ensure improved charging of batteries that experience wider temperature variations
during the year
- MOSFET based reverse current blocking for night-time battery discharge prevention. This
allows much lower losses as compared to Diode based blocking
- Protections: (i) PV over current (ii) PV short circuit (iii) PV reverse polarity (iv) PV over
voltage (v) High voltage transients on PV input (vi) Battery reverse polarity (vii) Battery
over voltage (viii) Battery over discharge (ix) Controller / battery overtemperature (x) Over
voltage, overload and short circuit protections on Load Terminals
2.3 APPLICATIONS
- Recreational / Service Vehicles
- Off grid
- Portable Charging Kits
- Boats and marine crafts
- Field work / mobile ofces
- Telecommunications
SECTION 2 | General Information, Features
& Layout
2.4 LAYOUT
1 2 3
7B
4
5A5A5B5B6A6A6B6B7A7A7B
98
LEGEND FOR FIG 2.1
Item No. Description Item No. Description
1
PV Status LED
2
Battery Status LED
3
Load Status LED
Load On/Off Button
4
Also used for clearing fault
5A
PV Input Terminal (+)
5B
PV Input Terminal (–)
* If the temperature sensor is short-circuited or damaged, the controller will charge or
discharge at the default temperature setting of 25°C.
Fig 2.1: Layout of Charge Controller MSK-10A
6A
Battery Terminal (+)
6B
Battery Terminal (–)
7A
Load Terminal (+)
7B
Load Terminal (–)
Connector for optional remote
*
8
battery temperature sensor
"MSK-TS"
RS-485 Communication Port
9
(NOT USED)
6 | SAMLEX AMERICA INC.
SECTION 3 | Installation
3.1 SAFETY
WARNING!
PLEASE READ ALL THE SAFETY INSTRUCTIONS GIVEN IN SECTION 1 BEFORE
INSTALLING AND OPERATING THE CONTROLLER. FAILURE TO ABIDE BY THE
RECOMMENDATIONS MAY CAUSE PERSONAL INJURY / DAMAGE TO THE KIT.
DO NOT USE THE UNIT IN WET ENVIRONMENT
• Please note that this unit is not waterproof (its Ingress Protection Rating is
IP-30). Hence, please ensure that the unit is installed in dry environment.
GROUNDING
• Ground the Negative terminal of the battery to Earth Ground in shore
installation and to the Chassis Ground in Negative grounded mobile
installations.
BATTERY TYPES
• The unit has been set to optimally charge 12/24V, sealed (AGM) Lead Acid
Batteries
MISE EN GARDE!
VEUILLEZ LIRE TOUTES LES INSTRUCTIONS DE SÉCURITÉ DONNÉES DANS LA
SECTION 1 AVANT D'INSTALLER ET D'UTILISER LE CONTRÔLEUR. NON-RESPECT
DE LA LES RECOMMANDATIONS PEUVENT PROVOQUER DES BLESSURES OU
ENDOMMAGER LE KIT.
!
CAUTION!
!
ATTENTION!
N'UTILISEZ PAS L'APPAREIL DANS UN ENVIRONNEMENT HUMIDE
• Veuillez noter que cet appareil n'est pas étanche (son indice de protection
d'entrée est ip-30). Par conséquent, veuillez vous assurer que l'unité est installée
dans un environnement sec.
MISE À LA TERRE
• Mettez à la terre la borne négative de la batterie à la terre à la terre dans
l'installation à terre et à la masse du châssis dans les installations mobiles à la
terre négative.
TYPES DE BATTERIE
• L'unité a été réglée pour charger de manière optimale des batteries au plomb
scellées (AGM) de 12/24V
SECTION 3 | Installation
3.2 DIMENSIONAL DRAWING
Dimensional drawing is given at Fig 3.1 below:
126
Height: 37
6
Mounting Hole: 4.3 mm
Terminals: 4 mm
2
34.65
+ – + – + –
138.6
NOTE: All dimensions are in mm
Fig 3.1: Dimensional Drawing of Charge Controller MSK-10A
3.3 MOUNTING
Refer to Fig 3.2
When mounting the controller, ensure free air through the ventilation slots at the
bottom of the unit. 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, forced air
ventilation is highly recommended.
WARNING!
RISK OF EXPLOSION! NEVER INSTALL THE CONTROLLER IN A SEALED ENCLOSURE WITH FLOODED BATTERIES! DO NOT INSTALL IN A CONFINED AREA
WHERE BATTERY GASSES CAN ACCUMULATE.
69.3
4.3
MISE EN GARDE!
RISQUE D'EXPLOSION! N'INSTALLEZ JAMAIS LE CONTRÔLEUR DANS UN
BOÎTIER SCELLÉ AVEC DES BATTERIES INONDÉES! NE PAS INSTALLER DANS
UNE ZONE CONFINÉE OÙ DES GAZ DE BATTERIE PEUVENT S'ACCUMULER.
8 | SAMLEX AMERICA INC.
SECTION 3 | Installation
3.3.1 Step 1: Choose Mounting Location
Locate the controller in area protected from direct sun, high temperature, and water.
Make sure there is good ventilation.
3.3.2 Step 2: Check For Clearance
Place the controller in the location where it will be mounted. Verify that there is sufcient room to run wires and that there is sufcient room above and below the controller
for airow.
3.3.3 Step 3: Mark Holes
Use a pencil or pen to mark the 2 mounting hole locations on the mounting surface,
(Refer to the dimensional drawing in Fig 3.1)
3.3.4 Step 4: Drill Holes
Remove the controller and drill 2 holes in the marked locations. Use drill size #29 for #8
self tapping screws.
3.3.5 Step 5: Secure Controller
Place the controller on the surface and align the mounting holes with the drilled holes
in Step 3.3.4. Secure the controller in place using 2, #8 self tapping screws.
3.4 CONNECTIONS
Solar Panel
or Array
+
12V/24V
Inverter
120 VAC
Optional
Temp
Sensor
MSK-TS
Fuse F2
MSK-10A
NOTE: Maximum current on the Load
Fuse
F1
(15A)
+ –
12V/24V
Battery
Ground the Negative Terminal
of the battery as follows, if required by code:
• Ground to Earth Ground in shore installations
• Ground to Chassis Ground in Negative Grounded
mobile installations
Fig 3.2: Wiring Diagram
Terminals should be limited to 10A
12V/24VDC
Load (<10A)
e.g. Light
Light Switch “S1”
rated for 10A
SECTION 3 | Installation
3.4.1 Step1: Battery Connection
Refer to Fig 3.2
Before the battery is connected, make sure that battery voltage is greater than 8V so
as to start up the controller. If the battery system voltage is 24V, make sure the battery
voltage is not less than 18V to ensure that battery system voltage is correctly sensed as
24V (auto sensing feature for battery system voltage will erroneously sense voltage <
18V as 12V battery system). Battery system voltage will be sensed automatically when
the controller starts up for the rst time. 15A fuse "F1" is used to protect the cable run
from the battery to the charge controller against short circuit. Install the fuse not more
than 7" from the battery Positive terminal. Do not insert the fuse at this time.
WARNING!
RISK OF EXPLOSION OR FIRE! NEVER SHORT CIRCUIT BATTERY POSITIVE (+)
AND NEGATIVE (-).
MISE EN GARDE!
RISQUE D'EXPLOSION OU D'INCENDIE! NE COURT-CIRCUITEZ JAMAIS LA
BATTERIE POSITIF (+) ET NÉGATIF (-).
3.4.2 Step 2: Load Connection through Load Terminals (Limited to 10A)
Refer to Fig 3.2
The Load Terminals of the controller can be connected to such electrical devices as lights
and other devices with load current of up to 10A. Controller provides power to the
load(s) through the battery.
When load(s) are fed from the Load Terminals, the controller will provide the following
protections on the load side:
Protect the battery as follows:
- Battery Low Voltage Alarm (≤12V/24V): Battery Status LED (2, Fig 2.1) will be steady OR-
ANGE. Output will still be available at Load Terminals. This condition will be auto reset at
12.2 / 24.4V
10 | SAMLEX AMERICA INC.
WARNING!
CURRENT OUTPUT ON THE LOAD TERMINALS IS LIMITED TO A MAXIMUM
OF 10A. IF HEAVIER LOADS DRAWING MORE THAN 10A LIKE INVERTER ETC.
ARE REQUIRED TO BE POWERED, CONNECT THEM DIRECTLY TO THE BATTERY
THROUGH APPROPRIATE FUSE "F2" THAT SHOULD MATCH THE DC INPUT CURRENT OF THE INVERTER. THIS FUSE SHOULD ALSO BE INSTALLED WITHIN 7" OF
THE BATTERY (+) TERMINAL.
SECTION 3 | Installation
MISE EN GARDE!
LA SORTIE DE COURANT SUR LES BORNES DE CHARGE EST LIMITÉE À UN
MAXIMUM DE 10A. SI DES CHARGES PLUS LOURDES DE PLUS DE 10 A
COMME L'ONDULEUR, ETC. DOIVENT ÊTRE ALIMENTÉES, CONNECTEZ-LES
DIRECTEMENT À LA BATTERIE VIA LE FUSIBLE APPROPRIÉ "F2" QUI DOIT
CORRESPONDRE AU COURANT D'ENTRÉE CC DE L'ONDULEUR. CE FUSIBLE
DOIT ÉGALEMENT ÊTRE INSTALLÉ À MOINS DE 7 "DE LA BORNE (+) DE LA
BATTERIE.
- Battery Over Voltage (≥16V/32V):
• Battery Status LED (2, Fig 2.1) will be blinking GREEN (4 Hz)
• Load will be disconnected. This condition will be automatically reset at 15.0 / 30.0V.
- Battery is Over Discharged (≤11.1V/22.2V): Battery Status LED (2, Fig 2.1) will be steady
RED. Output to Load Terminals will be disconnected. This condition will be auto reset at
12.6/ 25.2V
Protect the load as follows:
- Overload or short circuit in the load connected to the Load Terminals: Output
to Load Terminals will be disconnected (Refer to Sections 5.1.4 & 5.1.5 for details)
Connect the Positive (+) and Negative (-) of load(s) to controller Load Terminals as
shown in Fig 3.2.
An in-line Switch "S1" may be wired in series in the load Positive (+) wire as show in
Fig 3.2. This switch may be placed near the load to turn on and turn off the load locally.
If the Load Terminals of the controller are fed to a distribution panel for further distribution to the loads, each load circuit may be fused separately. Ensure that the maximum
total running / start up current draw of the load(s) is less than 10A.
3.4.3 Step 3: Solar Panel / Array Connection
WARNING!
RISK OF ELECTRIC SHOCK! EXERCISE CAUTION WHEN HANDLING SOLAR
CONNECTIONS. HIGH VOLTAGE OUTPUT FROM THE PV PANEL(S)/ARRAY MAY
CAUSE SHOCK OR INJURY. COVER THE PV PANEL(S)/ARRAY FROM THE SUN
BEFORE INSTALLING SOLAR WIRING.
SECTION 3 | Installation
MISE EN GARDE!
RISQUE DE CHOC ELECTRIQUE! FAITES PREUVE DE PRUDENCE LORS DE LA
MANIPULATION DE L'ÉNERGIE SOLAIRE CONNEXIONS. LA SORTIE HAUTE
TENSION DES PANNEAUX PHOTOVOLTAÏQUES PEUT PROVOQUER DES
CHOCS OU DES BLESSURES. COUVREZ LES PANNEAUX PHOTOVOLTAÏQUES
DU SOLEIL AVANT D'INSTALLER LE CÂBLAGE SOLAIRE.
The controller can accept 12V (36 cell) or 24V nominal (72 cell) PV panel(s) with maximum Open Circuit Voltage of up to 50V. Continuous voltage > 50V will damage the
input section of the controller due to short circuiting of the Transient Voltage Suppressor (TVS) connected across the PV input terminals.
3.4.4 Step 4: Battery Temperature Sensing & Compensation
The controller has internal battery temperature sensing that will provide approximate
battery temperature sensing in cases where the controller is located very close to the
battery.
Optional Battery Temperature Sensor Model MSK-TS (with 3m/10ft cable) may be ordered if the battery is installed up to 3m/10ft away from the controller. Insert the female
connector into the Jack marked "Temp Sensor" (8, Fig 2.1). Attach the cylindrical sensor
half way down the vertical side of the warmest battery in the battery bank so that the
sensor picks up the temperature of the electrolyte. Use 1 mil PVC Pipe Wrap to tape the
sensor to the battery (pre-clean the battery surface with rubbing alcohol prior to placing
the tape).
Battery Temperature Coefcient is -18mV/°C for 12V battery & -36mV/°C for 24V battery.
3.4.5 Step 5: Install Fuse
Install 15A fuse "F1" in the battery circuit.
3.4.6 Step 6: Conrm Power ON
When battery power is applied, the controller will start operating. Refer to Table 4.1
under Section 4.7 for operational information through the PV / Battery / Status LEDs (1,
2 & 3 in Fig 2.1).
12 | SAMLEX AMERICA INC.
SECTION 4 | Operation
4.1 PRINCIPLE OF OPERATION OF SOLAR CHARGING WITH SERIES
TYPE PULSE WIDTH MODULATION (PWM) CONTROL
The design and operation of MSK-10A is based on Series Type PWM (Pulse Width
Modulation) control at PWM frequency of 25 Hz.
4.2 PWM EXPLANATION
The output of the PV Panel(s)/ Array is connected to the battery in series with a Mosfet
Switch inside the controller. A Micro-controller controls the ON / OFF operation of the
Mosfet Switch to control the charging current and consequently, the State of Charge of
the battery.
A PV Panel /Array is a current source that outputs constant current equal to its Short
Circuit Current (Isc) over a wide voltage range (provided Irradiance Level, Spectrum and
Cell Temperature remain constant). For example, at STC, a typical 12V nominal, 45W PV
Panel may provide constant Short Circuit Current (Isc) of around 3A over voltage range
from 0V to around 15V.
PWM consists of repetitive cycles of controlled duration of ON and OFF states of the
Series Connected Mosfet Switch inside the controller. The sum of ON and OFF times of
one cycle is called the Pulse Period. In PWM control, the duration of the Pulse Width
(ON time) is varied (modulated) and is dened by “Duty Cycle” which is the ratio of
the “ON Time” to the “Pulse Period ”. Duty Cycle is normally specied in %. Thus, 0%
Duty Cycle will mean that the switch is constantly OFF (will output 0A) and 100% Duty
Cycle will mean that the switch is constantly ON and will output the full instantaneous
Short Circuit Current “Isc” of the panel. For Duty Cycles > 0% and < 100%, the switch
will alternate between ON and OFF states in a controlled manner in every cycle and will
output variable average current within a range of 0A to the full Short Circuit Current Isc.
Thus, through PWM control, the Mosfet Switch inside the controller converts constant
Short Circuit Current (Isc) of the PV Panel(s) to controlled average charging current at
its output by varying the Duty Cycle. The average value of the charging current is equal
to the instantaneous input value of Short Circuit Current (Isc) of the panel multiplied by
the Duty Cycle.
4.3 PWM CHARGING IN MSK-10A
Battery charging is a current based process. Current fed to the battery results in recharging of the cells and consequent rise in battery voltage. Controlling the current will
control battery voltage. For 100% return of capacity, and for prevention of excessive
gassing and sulfation, the battery charging voltage is required to be controlled at the
specied Voltage Regulation Set Points for Absorption, Float and Equalization Charging
Stages for different battery types. Battery can, thus, be charged at the specied Voltage
Regulation Set Points by PWM of the charging current through control of Duty Cycle as
explained above. The controller checks the battery voltage and updates the Duty Cycle
regularly at a very fast rate. The Duty Cycle is proportional to the difference between
the sensed battery voltage and the Voltage Regulation Set Point. Once the specied
Voltage Regulation Set Point is reached, it is kept steady - rise in voltage is compensated
SECTION 4 | Operation
BATTERY VOLTAGE
by reducing the average current by reducing the Duty Cycle and fall in voltage is compensated by raising the average current by raising the Duty Cycle. These fast updates on
battery voltage measurements and Duty Cycle corrections ensure charging of the battery at the specied Voltage Regulation Set Point with minimum voltage deviation.
4.3.1 Optimum PWM Frequency
The PWM frequency can range from tens of Hz to around 1000 Hz. At higher frequencies, the time period between the cycles is lesser and is not sufcient to complete the
electro-chemical reactions. At lower frequencies, the rise times of the charging pulses
are lower which results in higher gas bubble formation resulting in lowering of active
surface area and increase of internal impedance. In
MSK-10A, frequency of 25 Hz is used for optimum charging performance.
4.3.2 Benets of pulsing nature of charging current during PWM
During PWM voltage regulated stages of Absorption, Float and Equalization, Duty Cycle
is lower and the charging current is in the form of pulses. Pulsing charging current allows some Oxygen and Hydrogen generated during charging chemical reactions to be
chemically combined again and then absorbed. This eliminates concentration polarization and ohm polarization and reduces the internal pressure of the battery. Consequently, charging process is smoother and more capacity is returned to the battery. Further,
pulsing current provides more time to react, which reduces the gassing volume and
improves the absorption rate of charging current.
4.4 CHARGING PROFILES
The controller has been set for the following 2 Charging Proles:
(a) 3-Stage Normal Prole: See Fig 4.1A & Section 4.4.1 for details
(b) 3-Stage Equalization Prole: See Fig 4.1B & Section 4.4.2 for details
STAGE 2
24V
12V
NIGHT NIGHT NIGHT NIGHT
16
32
15
30
14
28
13
26
12
24
11
22
10
20
ABSORPTION
STAGE 1
BULK
2 Hrs
V
Fig 4.1A 3-Stage Normal Prole
Bulk Absorption Float
STAGE 3
f
DAY
TIME
FLO AT
V
a
STAGE 2
EQUALIZATION
STAGE 1
BULK
2 Hrs
V
Fig 4.1B 3-Stage Equalization Prole
Bulk Equalization Float
f
DAY
TIME
STAGE 3
FLO AT
V
e
LEGEND FOR FIG 4.1A & FIG 4.1B:
Va - Absorption Stage PWM Voltage Regulation Set Point
Ve - Equalization Stage PWM Voltage Regulation Set Point
Vf - Float Stage PWM Regulation Voltage Set Point
Figs 4.1A & 4.1B Charging Proles
14 | SAMLEX AMERICA INC.
SECTION 4 | Operation
4.4.1 Normal Charging Prole
Please refer to Fig 4.1A
This charging cycle is carried out for normal day to day charging. Charging is sequential:
Stage 1:
of the panel (Current) Stage 2: Absorption Stage (Constant Voltage) Stage 3:
Float Stage (Constant Voltage).
4.4.1.1 Stage 1 - Bulk Stage
Please refer to Fig 4.1A
This is almost a constant current stage. During this stage, the Mosfet Switch is kept at
100% Duty Cycle (ON continuously) and hence, maximum current equal to the available
instantaneous Short Circuit Current "Isc" of the panel is fed to the battery and the battery voltage starts rising. When the voltage rises to the Absorption Transition Voltage
Set Point “Va”, the controller transitions to Absorption Stage. At the end of the Bulk
Stage, the battery is charged to around 80% capacity. The balance of 20% capacity is
restored in the next Absorption Stage.
4.4.1.2 Stage 2 - Absorption Stage
Please refer to Fig 4.1A
The controller enters this stage from the previous Bulk Stage when the battery voltage
rises to the Absorption Transition Voltage Set Point “Va” which is internally set as follows:
- “Va” for 12V battery: 14.4V for Sealed Lead Acid (AGM - Absorbed Glass Mat)
- “Va” for 24 V battery: 28.8V for Sealed Lead Acid (AGM - Absorbed Glass Mat)
This stage is timed for 2 Hrs - either continuous or cumulative.
Bulk Stage (Maximum available Current = Instantaneous Short Circuit Current “Isc”
This is a constant voltage stage and the Mosfet Switch operates under PWM control
by feeding pulsing Short Circuit Current “Isc” with constantly reducing Duty Cycle (<
100% to > 0%) / average current to keep the battery voltage constant at the Absorption Transition Voltage Set Point “Va”. This is an intentional, controlled over voltage
condition for the battery for 2 Hrs. This is necessary to return the balance 20% of the
capacity. At this voltage, the battery starts gassing (evolution of Hydrogen and Oxygen
due to electrolysis of water in the electrolyte) and hence, it is necessary to exit this stage
as soon as 100% capacity is restored. If this over voltage condition is allowed to continue
after 100% recharging, the battery will be damaged due to effects of overcharging like
overheating, loss of water (ooded batteries), corrosion of the Positive plates and excessive build up of pressure resulting in acid spillage due to opening of pressure activated
relief valves (sealed batteries). The balance of 20% of the battery capacity is restored in
this stage. As the battery capacity rises from 80% to 100%, the PWM control tapers the
current by continuously reducing the Duty Cycle from < 100% to > 0%.
Change over to the next Float Transition Voltage Set Point “Vf” (13.8V for 12 V battery and 27.6V for 24V battery) is possible only after the battery voltage is held at the
selected Absorption Transition Voltage Set Point “Va” for continuous or cumulative
period of 2 Hours. If Absorption Transition Voltage Set Point “Va” cannot be maintained
continuously / cumulatively for 2 Hr, transition to Float Stage WILL NOT take place.
SECTION 4 | Operation
4.4.1.3 Stage 3 - Float stage
Please refer to Fig 4.1A
The controller enters this stage from the previous Absorption Stage after the battery
voltage is held at the selected Absorption Transition Voltage Set Point “Va” for continuous or cumulative period of 2 Hours.
This is also a constant voltage stage and the Mosfet Switch operates under PWM control
by feeding pulsing, instantaneous Short Circuit Current “Isc” with very low Duty Cycle
of > 0% to < 10% to keep the battery voltage constant at the Float Transition Voltage
Set Point “Vf” (13.8V for 12V battery and 27.6V for 24V battery). During this stage, the
battery is 100% charged and a very low “Trickle Charge” of around 0.1% of the Ah Capacity is required to be fed to the battery to compensate for self-discharge. The battery
can be left at this stage for prolonged period of time.
NOTE: During Float Stage, if the load current is more than the current from the PV
Panel(s), the battery voltage will drop. If the battery voltage drops to 13.2V for 12V
battery and 26.4V for 24V battery, the controller reverts to Stage 2: Absorption Stage.
4.5 EQUALIZATION OF LEAD ACID BATTERIES - GENERAL INFORMATION
16 | SAMLEX AMERICA INC.
WARNING!
RISK OF EXPLOSION AND EQUIPMENT DAMAGE!
• Equalizing ooded battery can produce explosive gases. Ensure proper ventilation
of the battery box
• Equalization may increase battery voltage to the level that can damage sensitive DC
loads. Ensure that DC input voltage of all DC loads is greater than the Equalizing
Charging Set Point. DC loads not matching Equalization Voltage Set Point, Ve (Fig 4.1B)
should be disconnected.
!
CAUTION!
• Top up the electrolyte with distilled water after completion of equalization.
• Excessive overcharging and gassing too vigorously can damage the battery plates
and cause shedding of active material from the plates. An equalization that is too
high or for too long can be damaging. Review the requirements for the particular
battery being used in your system.
SECTION 4 | Operation
MISE EN GARDE!
RISQUE D'EXPLOSION ET DE DOMMAGES MATÉRIELS!
• L'égalisation de la batterie inondée peut produire des gaz explosifs. Assurer une
bonne ventilation du boîtier de batterie
• L'égalisation peut augmenter la tension de la batterie au niveau qui peut
endommager les charges CC sensibles. Assurez-vous que la tension d'entrée CC de
toutes les charges CC est supérieure au point de consigne de charge d'égalisation.
Les charges CC ne correspondant pas au point de consigne de tension d'égalisation
doivent être déconnectées.
!
ATTENTION!
• Remplissez l'électrolyte avec de l'eau distillée une fois l'égalisation terminée.
• Une surcharge excessive et un gazage trop vigoureux peuvent endommager les
plaques de la batterie et provoquer une perte de matière active des plaques. Une
égalisation trop élevée ou trop longue peut être dommageable. Passez en revue les
exigences de la batterie particulière utilisée dans votre système.
Equalization is intentional overcharging of the battery for controlled period of time.
Routine equalization cycles are often vital to the performance and life of a battery –
particularly in a solar system where peak sun hours per day are limited and variable and
may not be sufcient to keep the battery in a fully charged condition. Periodic equalization is carried out for proper health and long life of a Lead Acid battery to prevent /
reduce the following undesirable effects:
4.5.1 Sulfation
If the charging process is not complete due to inability of the charger to provide the
required voltage levels or if the battery is left uncharged for a long duration of time,
soft Lead Sulfate crystals on the Positive and Negative plates that are formed during
discharging / self discharge are not fully converted back to Lead Dioxide on the Positive
plate and Sponge Lead on the Negative plate and get hardened and are difcult to dislodge through normal charging. These crystals are non-conducting and hence, introduce
increased internal resistance in the battery. This increased internal resistance introduces
internal voltage drop during charging and discharging. Voltage drop during charging results in overheating and undercharging and formation of more Lead Sulfate crystals. Voltages drop on discharging results in overheating and excessive voltage drop in the terminal
voltage of the battery. Overall, this results in poor performance of the battery. Sulfation
may be reduced partially by the stirring / mixing action of the electrolyte due to gassing
and bubbling because of intentional overcharging during the Equalization Stage.
SECTION 4 | Operation
4.5.2 Electrolyte Stratication
Electrolyte stratication can occur in all types of ooded batteries. As the battery is
discharged and charged, concentration of Sulphuric Acid becomes higher at the bottom
of the cell and lower at the top of the cell. The low acid concentration reduces capacity
at the top of the plates, and the high acid concentration accelerates corrosion at the
bottom of the plates and shortens battery life. Stratication can be minimized by the
Equalization Stage by raising the charging voltage so that the increased gassing and
bubbling agitates / stirs the electrolyte and ensures that the electrolyte has uniform
concentration from top to bottom. The stirring action also helps to break up any Lead
Sulfate crystals, which may remain after normal charging.
4.5.3 Unequal Charging of Cells
During normal charging, temperature and chemical imbalances prevent some cells from
reaching full charge. As a battery is discharged, the cells with lower voltage will be
drained further than the cells at the higher voltage. When recharged, the cells with the
higher voltage will be fully charged before the cells with the lower voltage. The more
a battery is cycled, the more cell voltage separation takes place. In a healthy battery, all
the individual cells will have the same voltage and same specic gravity. If there is a substantial difference in the cell voltages (0.2 V or more) and in the specic gravities (0.015
or more) of the individual cells, the cells will require equalization. Equalizing batteries
helps to bring all the cells of a battery to the same voltage. During the Equalization
Stage, fully charged cells will dissipate the charging energy by gassing while incompletely charged cells continue to charge.
4.6 EQUALIZATION CHARGING PROFILE
Please refer to Fig 4.1B
Equalization charging prole is carried out automatically every 28 days whenever the
battery is over discharged and the battery voltage drops to 11.1V for 12V battery and
22.2V for 24V battery.
4.6.1 Stage 1 Bulk Stage
Please refer to Fig 4.1B
This is the same as the Bulk Stage in the Normal Charging Cycle (See Section 4.4.1.1)
4.6.2 Stage 2 Equalization Stage
Please refer to Fig 4.1B
The controller enters this stage from the previous Bulk Stage when the battery
voltage rises to the Equalization Transition Voltage Set Point “Ve” which is internally
set as follows:
- “Ve” for 12V battery: 14.6V for Sealed Lead Acid (AGM - Absorbed Glass Mat)
- “Ve” for 24V battery: 29.2V for Sealed Lead Acid (AGM - Absorbed Glass Mat)
This stage is timed for 2 Hrs - either continuous or cumulative
18 | SAMLEX AMERICA INC.
SECTION 4 | Operation
This is a constant voltage stage and the Mosfet Switch operates under PWM control by
feeding pulsing Short Circuit Current “Isc” with constantly reducing Duty Cycle (< 100%
to > 0%) / average current to keep the battery voltage constant at the Equalization
Transition Voltage Set Point “Ve”. This is an intentional, controlled over voltage condition for the battery for 2 Hrs. This is necessary for equalization requirements.
Change over to the next Float Transition Voltage Set Point “Vf” (13.8V for 12V
battery and 27.6V for 24V battery) is possible only after the battery voltage is held at
the selected Equalization Transition Voltage Set Point “Ve” for continuous or cumulative period of 2 Hours. If Equalization Transition Voltage Set Point “Ve” cannot
be maintained continuously / cumulatively for 2 Hr, transition to Float Stage WILL NOT
take place.
4.6.3 Stage 3 - Float stage
Please refer to Fig 4.1B
The controller enters this stage from the previous Equalization Stage after the battery
voltage is held at the selected Equalization Transition Voltage Set Point “Ve” for continuous or cumulative period of 2 Hours.
This stage is the same as the Float Stage in the Normal Charging Cycle (See Section 4.4.1.3).
NOTE: During Float Stage, if the load current is more than the current from the PV
Panel(s), the battery voltage will drop. If the battery voltage drops to 13.2V for 12V
battery and 26.4V for 24V battery, the controller reverts to Stage 2: Absorption
SECTION 4 | Operation
4.7 LED INDICATIONS
LED indications for operational status are shown at Table 4.1.
TABLE 4.1 LED INDICATIONS FOR OPERATIONAL STATUS
Item No.
Description Color
(Fig 2.1)
PV Status LED
1
Battery Status LED
2
Load Status LED
3
LED Lighting
of LED
Green On Steady
Green Slow Blinking (1Hz)
Green Fast Flashing (4Hz) PV Reverse Polarity
Green OFF
Green On Steady Normal Battery Voltage is >12.4V / 24.8V
Green Slow Blinking (1Hz) Battery is fully charged
Green Fast Blinking (4Hz)
Orange On Steady
Red On Steady
Red Slow Blinking (1Hz)
Red On Steady Battery power to Load Terminals is ON
Red Off Battery power to Load Terminals is OFF
Red Slow Flashing (1Hz)
Pattern
Operational Status
Low solar irradiance due to poor sunlight.
PV panel/array voltage is more than 8V but
less than the battery voltage and hence,
there will be no charging.
PV Voltage is > battery voltage.
Charging is taking place.
PV Voltage is <5V (Night time or PV is
disconnected)
Battery over voltage: 16V / 32V
• Auto reset at 15.0V / 30.0V
Battery under voltage warning: 12V / 24V
• Auto reset at 12.2V / 24.4V
Battery is over discharged to 11.1 / 22.2V.
• Auto reset at 12.6V / 25.2V
Battery over heated to >65°C. Charging is
stopped. (Optional Battery Temperature
Sensor MSK-TS has been connected)
• Auto reset at <55°C
Overload on the Load Terminals. Battery
power to Load Terminals is OFF
Red Fast Flashing (4Hz)
All 3 LED Indicators are blinking:
• PV Status LED (1) = Blinks Green
1,2,3
• Battery Status LED (2) = Blinks Orange
• Load Status LED (3) = Blinks Red
All 3 LED Indicators are blinking:
• PV Status LED (1) = Blinks Green
1,2,3
• Battery Status LED (2) = Blinks Red
• Load Status LED (3) = Blinks Red
20 | SAMLEX AMERICA INC.
Short circuit at Load Terminals. Battery
power to Load Terminals is OFF
- Internal hot spot is >85°C
• Input and output are disconnected
- Auto reset at < 75°C
System voltage error. Battery voltage does
not match the controller voltage. Check
battery voltage is 12V/24V. Press Load On/
Off Button (4, Fig 2.1) to clear the
malfunction.
SECTION 4 | Operation
4.8 LOAD ON/OFF CONTROL
When the controller is powered ON, press the Load On/Off Button (4, Fig 2.1) to toggle
the load ON and OFF. When load is ON, Load Status LED (3, Fig 2.1) will turn ON - RED.
4.9 BATTERY TEMPERATURE SENSING & COMPENSATION
Refer to Section 3.4.4 for details.
SECTION 5 | Protections & Troubleshooting
5.1 PROTECTIONS
5.1.1 PV Input Over Current
If the PV array output current exceeds 10A rating of the controller, the charging current
will be limited to the rated current of 10A.
5.1.2 PV Array Short Circuit
If PV array short circuit occurs, remove the short circuit to resume normal operation
automatically. The controller will not be damaged due to short circuit on the PV input side.
5.1.3 PV Reverse Polarity
Fully protected against PV reverse polarity. PV Status LED (1, Fig 2.1) will fast blink Green
@ 4Hz. The controller will not be damaged. Correct polarity of the connection to resume
normal operation.
5.1.4 Overload in the Load(s) Connected to Load Terminals
When the load is within the rated current of 10A, Load Status LED (3, Fig 2.1) will be
steady RED. When the load rises to ≥ 1.05 times (10.5A) for around 3 sec, overload protection is activated as follows:
1. Load will be disconnected for 5 sec – Load Status LED will slow blink 5 times @ 1Hz
2. Load will be reconnected – Load Status LED will be steady
3. If overload ≥ 10.5A continues for 3 sec, the load will be disconnected for 10 sec
and the Load Status LED will blink 10 times @ 1Hz
4. Load will be reconnected – Load Status LED will be steady
5. If overload ≥ 10.5A continues for 3 sec, the load will be disconnected for 15 sec
and the Load Status LED will slow blink 15 times @ 1Hz
6. Load will be reconnected – Load Status LED will be steady
7. If overload ≥ 10.5A continues for 3 sec, the load will be disconnected for 20 sec
and the Load Status LED will blink 20 times @ 1Hz
8. Load will be reconnected – Load Status LED will be steady
9. If overload ≥ 10.5A continues for 3 sec, the load will be disconnected for 25 sec
10. Load will be reconnected – Load Status LED will be steady
11. If overload ≥ 10.5A continues for 3 sec, the load will be disconnected
permanently and the Load Status LED will slow blink continuously @ 1Hz
• To reset, remove overload and press the Load On/Off Button (4, Fig 2.1) for
around 8 sec
5.1.5 Load Short Circuit
Short circuit condition is detected if the output current is ≥ 2 times (20A) momentarily.
The protection is activated and reset as follows:
1. If load current ≥ 20A is detected momentarily, the load will be disconnected
immediately and the Red Load Status LED will fast blink @ 4Hz for 5 sec
2. After 5 sec, the load will be reconnected. If short circuit condition continues, the
load will be disconnected immediately and the Red Load Status LED will continue
to fast blink @ 4Hz for 10 sec.
3. After 10 sec., the load will be reconnected. If the short circuit condition continues,
the load will be disconnected immediately and the Red Load Status LED will
continue to fast blink @ 4Hz for 15 sec.
4. After 15 sec., the load will be reconnected. If the short circuit condition continues,
22 | SAMLEX AMERICA INC.
SECTION 5 | Protections & Troubleshooting
the load will be disconnected immediately and the Red Load Status LED will
continue to fast blink @ 4Hz for 20 sec.
5. After 20 sec., the load will be reconnected. If the short circuit condition continues,
the load will be disconnected immediately and the Red Load Status LED will
continue to fast blink @ 4Hz for 25 sec.
6. After 25 sec., the load will be reconnected. If the short circuit condition continues,
the load will NOT be reset and the Red Load Status LED will continue to fast blink
@ 4Hz until the short circuit condition is removed and manual reset is carried out
by pressing the Load On/Off Button (4, Fig 2.1) for 8 sec.
5.1.6 Battery Reverse Polarity
Fully protected against battery reverse polarity. The controller will not be damaged. Correct polarity of wiring to resume normal operation.
5.1.7 Battery Over Voltage
At 16V/32V battery voltage, charging will be stopped. Battery Status LED (2, Fig 2.1) will
be fast blinking Green @ 4Hz. Automatic reset at 15V/30V.
5.1.8 Battery Over Discharge
At battery voltage of 11.1/ 22.2V, the load connected to Load Terminals (6A, 6B in Fig 2.1)
will be disconnected. Battery Status LED (2, Fig 2.1) will be Steady Red. Automatic reset
at 12.6/25.2V. (NOTE: Loads directly connected to the battery will continue to discharge
the battery.)
5.1.9 Overtemperature Protection – Battery
If the battery temperature exceeds 65°C, battery charging is stopped. Battery Status LED
(2, Fig 2.1) will slow blink Green @ 1Hz. Automatic reset at < 55°C.
NOTE: For this protection, optional Battery Temperature Sensor MSK-TS
will be required to be connected (See Section 3.4.4)
5.1.10 Overtemperature Protection – Controller
If the temperature of the controller’s heat sink exceeds 85°C, the input and output will
be disconnected. Connection will be resumed at 75°C.
5.1.11 Damaged Temperature Sensor
If the optional external battery temperature sensor Model MSK-TS (Section 3.4.4) is
short-circuited or damaged, the controller will charge or discharge at the default temperature of 25°C.
5.1.12 High Voltage Transients
Battery is protected against high voltage transients. In lightning prone areas, additional
external lightning protection is recommended.
SECTION 5 | Protections & Troubleshooting
5.2 TROUBLESHOOTING
Troubleshooting Guide is shown at Table 5.1. Please refer to LED indications at Section
4.7, Table 4.1 for supplementary information.
TABLE 5.1 TROUBLESHOOTING GUIDE
Symptom Possible Cause Remarks / Remedy
PV Status LED (1, Fig
2.1) is not lighted
although solar panel(s)
are exposed to sunlight
PV Status LED (1, Fig
2.1) is Steady ON
PV Status LED (1, Fig
2.1) is fast blinking
Green @ 4Hz
Battery Status LED (2,
Fig 2.1) is Green - fast
ashing @ 4Hz and
there is no output at
the Load Terminals
Battery Status LED
(2, Fig 2.1) is steady
Orange. Output is
available at the Load
Terminals
Battery Status LED (2,
Fig 2.1) is steady Red.
No output voltage at
the Load Terminals
• Energy from solar panel(s)
is not available at the Solar
Panel Input Terminals of the
controller.
• Voltage > 8V is not available simultaneously at the
Battery Terminals of the
controller.
Low solar irradiance due to
poor sunlight. PV panel/array voltage is > 8V but < the
battery voltage & hence, no
charging
• PV polarity is reversed
• No charging
Battery Over Voltage Disconnect Protection has been
activated due to high voltage
of ≥ 16V / 32V at the battery output terminals. Solar
Panel(s) and Load have been
disconnected
Battery Under Voltage
Warning Indication has been
activated at ≤ 12V / ≤ 24V.
Output is still available at the
Load Terminals
Protection against over
discharge of battery has been
activated at ≤ 11.1V / ≤ 22.2V
and the load has been disconnected.
• Check solar panel(s) wiring
• Check battery connection and series fuses and ensure voltage > 8V is available at
the battery terminals of the controller
Ensure that PV panel/array is exposed to
unobstructed and bright sunlight with no
clouds/shading
Correct polarity of PV connection.
Disconnect the Solar panel(s) and discharge the battery
Charge the battery. Reduce / switch OFF
load to allow the battery voltage to rise
Will be reset automatically when voltage
rises to 12.2V / 24.4V and LED will go back
to steady Green from steady Orange
Charge the battery. Reduce / switch off
load to allow the battery voltage to rise:
- Load will be reconnected automatically
at 12.6V / 25.2V and the LED will go back
to steady Green from steady Red
…Continued on page 25
24 | SAMLEX AMERICA INC.
SECTION 5 | Protections & Troubleshooting
TABLE 5.1 TROUBLESHOOTING GUIDE
Symptom Possible Cause Remarks / Remedy
Load Status LED (3, Fig
2.1) is slow blinking
Red @ 1Hz.
Load has been
disconnected.
Load Status LED (3, Fig
2.1) is fast blinking Red
@ 4Hz.
Load has been
disconnected.
• PV Status LED (1, Fig
2.1) is blinking Green
• Battery Status LED
(2, Fig 2.1) is blinking
Orange
• Load Status LED (3,
Fig 2.1) is blinking
Red
Load has been disconnected
due to overload in the load
circuit connected to the Load
Terminals:
- Read Section 5.1.4 for
details
Load has been disconnected
due to short circuit
- Read Section 5.1.5 for details
Heat sink of the
controller > 85°C
Remove the cause of overload:
- Reset by manually pressing the Load On/
Off Button (4, Fig 2.1) for 8 to 10 sec
- Read Section 5.1.4 for details
Remove the cause of short circuit.
- Reset by manually pressing Load On/Off
Button (4, Fig 2.1) for 8 to 10 sec.
- Read Section 5.1.5 for details.
Check reasons for overheating. Improve
ventilation and ensure proper cool airow
over heat sink surface
- Will reset automatically when the unit
cools down and temperature drops
to < 75°C
Controller has stopped
working.
• PV Status LED (1, Fig
2.1) is blinking Green
• Battery Status LED
(2, Fig 2.1) is blinking
Red
• Load Status LED (3,
Fig 2.1) is blinking
Red
Controller has stopped
working.
No LED indications Battery voltage is < 8V Charge the battery to voltage > 8V using
Battery temperature has
exceeded 65°C
Check reasons for overheating of the
battery.
- Will reset automatically when the battery temperature drops to below 55°C
NOTE:
This protection will be activated only
when optional Battery Temperature
Sensor Model MSK-TS has been installed
(See Section 3.4.4)
another AC charger.
SECTION 6 | Specications
6.1 GENERAL
PARAMETER SPECIFICATIONS
12V 24V
CHARGE CONTROLLER
Type of Charging Control Series Type, PWM control, PWM Frequency: 25Hz
Battery Type Optimized for Sealed Lead Acid, AGM
Battery System Voltage
Working Voltage Range of Charge Controller 8V to 32V
Rated Battery Charging Current Up to 10A
Rated Current on Load Terminals 10A
Charge Circuit Voltage Drop ≤ 0.28V
Discharge Circuit Voltage Drop ≤ 0.20V
Self Consumption ≤ 8.4mA for 12V battery / 7.8mA for 24V battery
Charging Stages Bulk, Absorption, Equalization, Float
Normal Charging Prole:
• Bulk Stage gAbsorption Stage gFloat Stage
Charging Proles
Bulk Stage Current
Absorption Stage Voltage 14.4V 28.8V
Absorption Stage Duration 2 Hrs
Float Stage Voltage 13.8V 27.6V
Equalization Stage Voltage 14.6V 29.2V
Equalization Stage Duration 2 Hrs
Automatic Reset to Absorption Stage 13.2V 26.4V
Charging Limit Voltage
Discharging Limit Voltage 10.6V 21.2V
Over Voltage Disconnect Voltage
Under Voltage Warning
Low Voltage Disconnect
Battery
Temperature
Compensation
Built-in Temp Sensor
External Temp Sensor
Model MSK-TS
(Optional)
Equalization Prole: Executed every 28 days or if
battery voltage drops to 11.1V/22.2V:
• Bulk Stage gEqualization Stage gFloat Stage
12V / 24V Nominal; Auto Sensing
(<18V sensed as 12V / >18V sensed as 24V)
Equal to Instantaneous Short Circuit Current Isc of
the PV Panel(s) / Maximum 10A
15.5V
Reset: 15.0V
16.0V
Auto Reset at 15.0V
12.0V
Auto Reset at 12.2V
11.1V
Auto Reset at 12.6V
-18mV/°C -36mV/°C
…Continued on page 27
31.0V
Reset: 30.0V
32.0V
Auto Reset at 30.0V
24.0V
Auto Reset at 24.4V
22.2V
Auto Reset at 25.2V
26 | SAMLEX AMERICA INC.
SECTION 6 | Specications
PARAMETER SPECIFICATIONS
12V 24V
INPUT – PV PANEL(S) / ARRAY
Maximum Open Circuit Voltage 50V
Maximum Short Circuit Current 10A
INPUT / OUTPUT CONNECTIONS
Type of connectors
Moving Cage Type for 4mm
size
PROTECTIONS
PV over current; PV short circuit; PV reverse
polarity; PV over voltage; High voltage transients
Protections
on PV input; Battery reverse polarity; Battery over
voltage; Battery over discharge; Controller / Battery
overtemperature; Over voltage, overload and short
circuit protections on Load Terminals
COMPLIANCE
Electro Magnetic Compatibility CE Marked
ENVIRONMENTAL
Operating Temperature -35°C to +50°C
Storage Temperature -35°C to +80°C
Humidity ≤ 95% Non Condensing
Ingress Protection (IP) Rating of Enclosure IP-30 (NOT waterproof)
MECHANICAL
Overall Dimensions 138.6 x 69.3 x 37mm
Weight 0.13 kg
2
/ Up to AWG #12 wire
NOTES:
1. Battery charging & protection voltages are at 25C
2. Specications are subject to change without notice
SECTION 7 | Warranty
3 YEAR LIMITED WARRANTY
MSK-10A Solar Charge Controller manufactured by Samlex America, Inc. (the “Warrantor“) are warranted to be free from defects in workmanship and materials under normal
use and service. The warranty period is 3 years for the United States and Canada, and is
in effect from the date of purchase by the user (the “Purchaser“).
Warranty outside of the United States and Canada is limited to 6 months. For a warranty
claim, the Purchaser should contact the place of purchase to obtain a Return Authorization Number.
The defective part or unit should be returned at the Purchaser’s expense to the authorized location. A written statement describing the nature of the defect, the date of purchase, the place of purchase, and the Purchaser’s name, address and telephone number
should also be included.
If upon the Warrantor’s examination, the defect proves to be the result of defective
material or workmanship, the equipment will be repaired or replaced at the Warrantor’s option without charge, and returned to the Purchaser at the Warrantor’s expense.
(Contiguous US and Canada only)
No refund of the purchase price will be granted to the Purchaser, unless the Warrantor
is unable to remedy the defect after having a reasonable number of opportunities to do
so. Warranty service shall be performed only by the Warrantor. Any attempt to remedy
the defect by anyone other than the Warrantor shall render this warranty void. There
shall be no warranty for defects or damages caused by faulty installation or hook-up,
abuse or misuse of the equipment including exposure to excessive heat, salt or fresh
water spray, or water immersion.
No other express warranty is hereby given and there are no warranties which extend
beyond those described herein. This warranty is expressly in lieu of any other expressed
or implied warranties, including any implied warranty of merchantability, tness for the
ordinary purposes for which such goods are used, or tness for a particular purpose, or
any other obligations on the part of the Warrantor or its employees and representatives.
There shall be no responsibility or liability whatsoever on the part of the Warrantor or
its employees and representatives for injury to any persons, or damage to person or
persons, or damage to property, or loss of income or prot, or any other consequential
or resulting damage which may be claimed to have been incurred through the use or
sale of the equipment, including any possible failure of malfunction of the equipment,
or part thereof. The Warrantor assumes no liability for incidental or consequential damages of any kind.
Samlex America Inc. (the “Warrantor”)
www.samlexamerica.com
28 | SAMLEX AMERICA INC.
Notes
Notes
30 | SAMLEX AMERICA INC.
Notes
Contact
Information
Toll Free Numbers
Ph: 800 561 5885
Fax: 888 814 5210
Local Numbers
Ph: 604 525 3836
Fax: 604 525 5221
Website
www.samlexamerica.com
USA Shipping Warehouse
Kent WA
Canadian Shipping Warehouse
Delta BC
Email purchase orders to
orders@samlexamerica.com
11023-MSK-10A-0120
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