MPPT Solar Charger Series

User`s ManualInstallation and Programming

MPPT Solar Charger SeriesMaximum Power Point Tracking Technology

Connection the solar array

or battery with reverse

polarity will permanently

damage the Charger.

RESERVED

BVS BTS

PV+

PV-

BAT-

BAT+

1

TABLE OF CONTENTS

1. Important Safety information ........................................................2

2. Introduction ................................................................................................32.1 Overview .....................................................................................................32.2 Maximum Power Point Tracking Technology .......................................52.3 Four-Stage Battery Charging Capability ...............................................52.4 Setting the Charging Point ......................................................................6

3. Installation ...................................................................................................73.1 PV Array Requirements ............................................................................73.2 Battery Voltage Sensor .............................................................................83.3 Battery Temperature Sensor ...................................................................83.4 Load Control Function and Wiring .........................................................83.5 Mounting Location ....................................................................................103.6 Grounding and Ground Fault Interruption ...........................................113.7 Wiring ..........................................................................................................11

4. Operation ......................................................................................................134.1 Power On ....................................................................................................134.2 Interface ......................................................................................................134.3 Initialization ................................................................................................134.4 General Operating .....................................................................................174.5 Protections .................................................................................................204.6 Inspection and Maintenance ...................................................................20

5. Troubleshooting ......................................................................................21

6. Specifications ...........................................................................................22

7. Warranty ........................................................................................................23

8. Appendix .......................................................................................................24 Wire Size and Length ..................................................................................24 Error Codes Indication ................................................................................25 Abbreviated ..................................................................................................26 Initialization Setting ..............................................................................26 Load Control Setting ............................................................................27

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1. Important Safety informationThis manual contains important instructions, safety, installation and operation for Sola Charger.* Please make sure you have read, understood and kept it for future reference.

In case of any risk of electric shock, fire or personal injury, please pay careful attention to the following symbols throughout this manual which indicate dangerous conditions, important safety information, or operational instructions.

WARNING CAUTION IMPORTANT

Identify conditions that could result in loss of perperties or fatal injuries.

Indicate items critical for safe installation or operation of the unit

Follow these instructions closely for proper operation of the unit.

Safety informationThis charge controller is to be connected to DC circuits only. These DC connections are identified by the symbol below.

Install external fuses/breakers as required. The battery circuit fuse or circuit breaker must be rated to 125% of the maximum current or more.

FCC requirements:This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause undesired operations.

About This ManualThis manual provides detailed information of installation and user instructions for Solar Charger. All information in this manual is intended for the system owner/operation and only qualified electricians and technicians who are familiar with solar system design and wiring practices should perform the installation.

General Safety Instructions1. All electrical works must be done in accordance with local, national, and/or international

electrical codes.2. Before installing or using this device, read all instructions and cautionary markings located in

(or on) this guide, the unit, the batteries, PV array, and any other equipment used.3. Shut off all DC breakers before connecting any wiring.4. Copper wiring must be rated at 75° C or higher.5. Keep cables together (e.g., using a tie-wrap) as much as possible.6. Ensure both cables pass through the same knockout and conduit fittings to allow the inductive

currents to cancel.7. DC battery over-current protection must be used as part of the installation.8. This product is designed for indoor mounting only. Do not expose this unit to rain, snow or

liquids of any type.

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9. To reduce the chance of short-circuits, use insulated tools when installing or working with the unit or any DC source (such as PV, hydro, wind, or batteries).

10.Remove all jewelries when installing or working with the unit or any DC source. This will greatly reduce the chance of accidental exposure to live circuits.

11.The unit contains more than one live circuit (batteries and PV array). Power may be present at more than one source.

12.This product contains no user-serviceable parts.

Battery Safety Information1. Always wear eye protection, such as safety glasses, when working with batteries.2. Remove all jewelries before working with batteries.3. Never work alone. Have someone assist you with the installation or stay close enough to come

to your aid when working with batteries.4. Always use proper lifting techniques when handling batteries.5. Always use identical types of batteries.6. Never install old or untested batteries. Check each battery’s date code or label to ensure age and type.7. Batteries should be installed in a well-vented area to prevent the possible buildup of explosive

gasses. If the batteries are installed inside an enclosure, vent its highest point to the outdoors.8. When installing batteries, allow at least 1 inch of air space between batteries to promote cooling

and ventilation.9. NEVER smoke in the vicinity of a battery or generator.10.Always connect the batteries first, then connect the cables to the inverter or controller. This will

greatly reduce the chance of sparks in the vicinity of the batteries.11.Use insulated tools when working with batteries.12.When connecting batteries, always verify proper voltage and polarity.13.Do not short-circuit battery cables. A short-circuit may cause damage to the batteries or chances

of fire or explosion.14.In the event of exposure to battery electrolyte, wash the area with soap and water. If acid enters

the eye, flood with running cold water for at least 15 minutes and get immediate medical attention.15.Always recycle old batteries. Contact your local recycling center for proper disposal information.

2. Introduction2.1 Overview

The Solar Charger is a photovoltaic charger controller that tracks the maximum power point of a PV array to deliver the maximum current for optimum charge of batteries. The unit can only be deployed with DC battery systems, please refer to the available models as below:

ModelSCUN25A SCUN60AMaximum 25 Amps continuous battery current12, 24 Volt DC systemsMaximum 100 Volt DC solar input open voltageMaximum 25 Amps DC solar input short current

Maximum 60 Amps continuous battery current12, 24, 36, 48 Volt DC systemsMaximum 150 Volt DC solar input open voltageMaximum 60 Amps DC solar input short current

Features•Four-stage charging process, with manual equalization to maximize system performance and

maintain expected battery life.•Aluminum die-cast chassis and heat sink for excellent convection.•Over-temperature protection. •Tri-color LED and optional dot-matrix LCD (2 lines X 20 characters). • Datalogging capability up to 60 days. • Manual and auto-equalized cycle.• Adjustable output current.

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Product OutlooksSCUN60A

I

H

M

JL

K

GO

AB

CD

EF

N

AB

CD

EG

F

JK

ML

H

I




damage the Charger.

N

RESERVED

BVS BTS

PV+

PV-

BAT-

BAT+

RESERVEDLoad

BATPV

BVSBTS

SCUN25A

I

H

M

JL

K

GO

AB

CD

EF

N

AB

CD

EG

F

JK

ML

H

I




damage the Charger.

N

RESERVED

BVS BTS

PV+

PV-

BAT-

BAT+

RESERVEDLoad

BATPV

BVSBTS

(A) : BAT+Connector of battery positive terminal

(F) : BTSConnector of battery temperature sensor

(K) : Up buttonOperation button (UP)

(B) : BAT-Connector of battery negative terminal

(G) : RESERVEDReserved for customized function

(L) : Enter buttonOperation button (ENTER)

(C) : PV-Connector of PV array negative terminal

(H) : LCDDisplay monitor

(M) : Setting buttonOperation button (Setting)

(D) : PV+Connector of battery positive terminal

(I) : LEDStatus indicator

(N) : Chassis groundSystem grounding of chassis

(E) : BVSConnector of battery voltage sensor

(J) : Down buttonOperation button (DOWN)

(O) : Load functionConnector of load

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2.2 Maximum Power Point Tracking TechnologyMaximum Power Point Tracking (MPPT) allows the solar charger to harvest the maximum energy from PV array and deliver to the batteries. The MPPT algorithm continuously adjusts the operating point in an attempt to find the maximum power point of the array, then determine if it is harvesting more or less power than previous operating points to ensure maximum conversion efficiency.

2.3 Four-Stage Battery Charging CapabilityThe four-stage charging process provides higher efficiency compared to on-off relay type or constant voltage solid-state regulators. During Float Stage, battery gassing reduced, electrolyte loss minimized, and a complete recharge is ensured. The charging voltage and current vary during the first three stages shown as below.

Bulk StageDuring Bulk Stage, the charge controller will work in MPPT mode, regulating the charging voltage to keep it at the predefined level of absorption stage.

Absorption StageWhen the battery voltage rises to the level of Absorption Stage, charging voltage will be constant to maintain battery voltage.

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Float StageDuring Float Stage, the battery voltage is held at a lower level. When system provides power to connected loads and the battery voltage drops to the recharge level, a new bulk cycle will be triggered.

Equalize StageThe equalization charge could bring all battery cells to an equal voltage by a deliberate overcharge. The intention is to make each battery cell recover its optimum condition through a series of voltage controlled chemical reactions inside the batteries.

2.4 Setting the Charging PointIt is important to select the correct battery type that matches the system to ensure proper charge and long battery life. Refer to the specifications provided by the battery manufacturer and choose a setting that best fits the recommended charging profile.

Model Battery Type

Absorption (Voltage)

Equalize (Voltage)

Float (Voltage)

AbsorptionDuration(Minutes)

EqualizeDuration(Minutes)

Equalize Interval(Days)

1 Gel 14 - 13.7 150 - -

2 Gel/AGM 14.15 14.4 13.7 150 60 28

3 Gel/AGM 14.3 14.6 13.7 150 60 28

4 AGM/Flooded 14.4 15.1 13.7 180 120 28

5 Flooded 14.6 15.3 13.5 180 120 28

6 Flooded 14.7 15.4 13.5 180 180 28

Charge Mode LED InductionMode Night Bulk Absor Float Equalize

LED(G)

Note: Flash per second. ● Light on. ○ Light off.

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3. Installation3.1 PV Array Requirements

For optimum performance, each individual PV array connected the solar charger must be composed of the same type of solar panel, with the same Voc and Vmpp specifications.

IMPORTANT : The following information provides only general guidelines. The installation and rated performance of your PV array is subject to inspection and approval by the authority having jurisdiction.

Array Size:An over-sized solar array will not operate at peak power. The solar array should be slightly less than recommended size for optimal performance. Below is a list of recommended array size for various battery voltages.

Battery Voltage Model

12V 24V 36V 48V

SCUN25A 400W 800W - - SCUN60A 800W 1600W 2400W 3200W

Array Voltage:When calculating PV array size for the solar charger, consider the expected maximum Voc (open circuit voltage) of the string under all possible conditions. Panel voltage increases when temperature drops. The panel manufacturers provides a Voc rating per panel, but it is usually rated at the temperature of 25˚C (77˚F). Panel voltage increases in cold temperature and this may cause the real Voc to exceed the Voc rating.

CAUTION: The PV array voltage must never exceed Voc of solar charger under all conditions.

Voc (open circuit voltage) Model150V SCUN60A100V SCUN25A

Hot weather: lower open circuit voltage/lower voltage of maximum power.Cold weather: higher open circuit voltage/higher voltage of maximum power.

Array Current:Panels with rated current of up to 60A/25A at 25˚C (77˚F) are recommended. Make sure that the Isc rating does not exceed 60A/25A under all conditions. A factor of 1.25 is applied to the rated Isc (at 25˚C) when the panel is colder than -21˚C.

CAUTION: The Isc (short circuit current) rating of the array must not exceed 60A input current rating of the solar charger at any time.

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3.2 Battery Voltage SensorThere are inevitable power losses in cables that carry electric current due to cable resistance. Therefore, administrator should perform voltage regulation based on the readings at battery terminals. Due to voltage drops in battery cables, the voltage of battery power connection will be higher than the actual voltage of a battery bank during charging. Two sense wires, range from 18 to 12 AWG, may be used for battery voltage sense as these wires carry no current and the voltage will be identical to the battery voltage. The maximum length allowed for each battery voltage sense wire is 98 ft (30 m). Be sure to connect the correct polarity when installing voltage sense wires or correct voltage readings may not be displayed.

Model Specification SCUN25A SCUN60A

Optional Terminal(BVS, BTS or Optional Pole) 8-18AWG 12-30AWG

Screw Torque 9 lb-inch 4 lb-inchOptional Terminal Information

CAUTION: Connect the voltage sense wires to the BTS terminal will damage the circuits.

3.3 Battery Temperature SensorThe Battery Temperature Sensor (BTS) is recommended for effective temperature compensated charging. The BTS is equipped with 33 ft (10 m) of 26 AWG (0.15 mm2) cable. There is no polarity either wire(+ or -) can be connected to screw terminal. The BTS cable may be routed through conduit along with the power wires. Tighten the connector screws to 4 lb-in (0.4-0.5 Nm) of torque. Separate installation instructions are provided inside the BTS bag.The battery temperature plays an important role in the recharging process—with higher ambient temperatures, the regulation set points (Absorption, Float and Equalization) need to be reduced to prevent battery overcharging. Under the conditions of lower ambient temperature, the voltage regulation set points need to be increased to ensure complete battery recharging.

IMPORTANT : Temperature Compensation Coefficient :-5mV/˚C/Cell Temperature Compensation Range :-30˚C to 80˚C

3.4 Load Control Function and WiringThe load control function is to disconnect system loads when the battery has discharged to a low state of charge and reconnect once the battery is sufficiently charged. System loads may be lights, pumps, motors, DC appliances, and other electric and electronic devices. The total current drawn must not exceed the maximum rating.

LOAD POSITIVE (+)

LOAD POSITIVE (-)

25 AMP FUSE

Reserved

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Connect positive (+) and negative (-) wires of the load to the system shown in figure above. Refer to the wire gauge chart on appendix page for correct wire size. The negative load connection can be earth grounded if necessary. Use appropriate gauge wire and proper grounding methods when performing installation.

CAUTION: Do not wire an AC inverter of any size to the load terminals of the solar charger. Damage to the load control circuit may result. Wire inverters directly to the battery or battery bank.

Load Current CompensationAll LVD and LVR setpoints are current compensated. The battery voltage will sag in proportion to the current drawn by the load. Without the feature of current compensation, a sudden large load could cause a premature LVD. LVD and LVR should be adjusted lower as the following table

Battery Voltage Compensation Coefficient12V -15mV/A24V -30mV/A

Load Control SettingsLoad control is fully automatic. If the battery discharges to the LVD preset level, the load will disconnect. Load disconnect will depend on many factors including:• Over of discharge• Battery capacity• health of the batteryA maximum regulation voltage of 15V (30V @ 24V nominal) applies for all battery types. This limit ensures that the battery and load terminal voltages will never exceed 15V/30V which protects certain DC loads from being damaged by high input voltage. Refer to the table below.

Model Function LVD Sel 1 LVD Sel 2 LVD Sel 3

Low Voltage Disconnect 10.5V 11.0V 11.5V

Low Voltage Reconnect 11.6V 12.1V 12.6V

High Voltage Disconnect 15V 15V 15V

Overload and Over CurrentOver CurrentIf the load current exceeds the maximum rating, the solar charger will disconnect the load. The charger will try to reconnect the load twice and each attempt will be approximately 10 seconds apart. If the overload remains, it will stay disconnected until the unit reboot.

Over Current (Short Circuit)The system provides protected against short circuit. After two attempts of automatic reconnection (10 seconds between each), the fault situation must be removed and reboot.

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Adjust Load TimingWith the voltage of solar panel changed during day or night time, the unit may automatically turn on or off which is perfect for lighting application. Users may choose from the function options as below:

Function Description

Disable Function turned off

2 hours Load turned on 2 hours after sunset




All Night Load turned on all night

3.5 Mounting LocationThe solar charger must be mounted vertically and installed indoor in a dry, protected location away from flammable materials, heat sources, moisture, and vibration. The location must also be free from direct sunlight, rain, snow and dust. The unit may be mounted in an enclosure with sealed batteries, but never with vented/flooded batteries. Released fume from vented batteries may cause corrosion and damage of the unit.

Minimum clearance requirement for air flow.

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3.6 Grounding and Ground Fault InterruptionUse a copper wire to connect the grounding terminal to earth ground of wiring box. The grounding terminal can be identified by the ground symbol shown as below behind the mockup. The minimum size of the copper grounding wire: 8 AWG (10 mm2)

Ground Symbol

CAUTION:This unit is not provided with a GFDI device. This charge controller must be used with an external GFDI device which meets the requirements of the Article 690 of the National Electrical Code (NEC) for the installation location.

3.7 WiringWire SizeThe terminals are rated for copper and aluminum conductors. Use UL-listed Class B 300 Volt stranded wire only. A proper system design generally requires large conductor wires for solar and battery connections to reduce the voltage drop to less than 3%. Please refer to the table below for proper wire size.

Model Specification SCUN25A SCUN60A

Power Terminal(PV+,PV-,BAT+,BAT-) 8-18AWG 1-20AWG

Screw Torque 9 lb-inch 30 lb-inch

Minimum Wire SizeThe NEC (National Electrical Code) requires that the carrying current of wire should never exceed 80% of the maximum rating. Refer to the wire gauge chart on appendix page for correct wire size allowed by NEC when the current equals the nominal rating. Wire types rated for 75°C and 90°C are included.

Over Current Protection and DisconnectsCircuit breakers or fuses must be installed in both the battery and solar circuits. The protection rating and installation method must comply with NEC (National Electrical Code) requirements. The battery fuse or circuit breaker must be able to sustain up to 125% of the maximum rating.

IMPORTANT :Fuses, circuit breakers, and disconnect switches should never disconnect the system ground. Only GFDI devices are permitted to disconnect ground.

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Connect Power Terminal

IMPORTANT :Example only. Actual wiring may vary. All configurations must comply with local safety codes. Consult your local authority to ensure compliance.

1. Connect the positive (+) output of the PV array to the PV array disconnect.2. Route another (+) cable from the other end of the PV disconnect to the Solar Charger

terminal marked PV+.3. Connect the negative (-) output of the PV array to the Solar Charger terminal marked PV-.4. Connect a positive (+) cable from the Solar Charger terminal marked BAT+ to the battery

disconnect.5. Connect a second positive (+) cable to the other side of the battery disconnect and

connect to the positive (+) battery terminal.6. Connect the negative (-) battery cable to the Solar Charger terminal marked BAT-.7. Torque the Solar Charger terminal according to the figure.

CAUTION:The solar PV array may produce open-circuit voltages in over-rated situation. Make sure the solar input breaker has been tripped (disconnected) before installation.*Connecting the solar array to the battery terminal will damage the Solar Charger.*Connecting the solar array or battery connection with reverse polarity will damage the charger.

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4. OperationThe Solar Charger is capable of fully automatic operation. Once installation is completed, few tasks need to perform for proper operation. The operator should be familiar with the operation and maintenance required in this section.

Battery Voltage Battery Type Output Current

Auto Scan Mode1-Gel 60A/25A

IMPORTANT :For Auto Scan function, the controller will auto detect the battery and work. Equalization is not available, and you need to select Battery Voltage manually.

4.1 Power OnStep1. Make sure the polarity of Solar Charger and battery is matched correctly.Step2. Turn on the battery connecting switch first.Step3. Note that the Solar Charger must be connected to a battery. The controller will not operate

only if the solar input is connected and available.Step4. Turn on the solar connecting switch. If the solar array is with sufficient sunlight, the charger

will start charging.

4.2 InterfaceThe featured interfaces include the LCD Display with four buttons and three LED Status Indicators for configuration, displaying system information, and operating status.

4.3 InitializationThe following sections describe how to configure the Solar Charger for desired application and function.

When in standby status, press “Setting” and hold for two seconds to enter the Setup Mode

When orange LED flashes, release the button.

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Battery Voltage SettingPress “Setting” to select system voltage, and refer to the table below. The Auto Scan function will detect the system voltage automatically at power on. If you select Auto Scan (default), you can skip Charge Current Setup. Simply press “Setting” and hold for two seconds to enter the next page.

Mode Auto Scan 12V 24V 36V 48V

LED(O)

Battery Voltage Setting Codes

Charge Mode SettingIn the menu page, you can adjust the charging voltage for batteries. It is important to select correct battery to ensure proper charging and long battery life.Press “Setting” to switch to Charge Mode, and refer to the table below 2.4 Charging Set points for correct configuration. If you select Gel Mode 1 (default), you can skip Charge Current Setup.When all settings are finished, press “Setting” and hold for two seconds to enter the next page.

Battery Type Gel Sealed Sealed AGM/Flooded Flooded Flooded

LED(G)

Battery Charge Mode Setting Codes

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Equalization SetupThe equalization of charge is to bring all battery cells to an equal voltage level. When equalizing, make sure the equalization voltage will not damage any DC-powered load. To avoid battery damages during charging or equalization, consult the battery manufacturer or refer to associated documentation before configuration. In the Force Equalization setting, the Solar Charger will equalize the battery immediately; In Automatic Countdown setting, the charger will equalize the battery once every 28 days. In the menu page of Equalization Setup, refer to the table below for configuration. Once finished, press “Setting” and hold for two seconds to enter the next page.

Equalization Setup Instruction

Automatic Countdown(G)

Force Equalization(R)

Equalization Function Setting Codes

Charge Current SetupIncorrect charge current may damage the battery or shorten battery life. In the menu page of Charge Current Setup, refer to the table below for configuration. Once finished, press “Setting” and hold for two seconds to end process and save settings.

SCUN60A 10 Amps 20 Amps 30 Amps 40 Amps 50 Amps 60 AmpsSCUN25A 4 Amps 8 Amps 13 Amps 17 Amps 21 Amps 25 Amps

LED(R)

Maximum Current Setting Codes

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Load Control SettingThe following sections describe how to configure the Solar Charger for the load control application and function.

When in standby page, press “Setting” and “Enter” simultaneously and hold for two seconds to enter the Setup Mode I.

When orange LED flashes, release the buttons to enter the next page.

Press “Setting” to select desired mode, please refer to Load Control Settings for details. Press “Setting” and hold for two seconds to enter the next page.

When orange LED flashes, release the buttons to enter the next page.

Press “Setting” to select desired mode, please refer to page 10 for details.Press “Setting” and hold for two seconds to save settings and restart.

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4.4 General OperatingMain pageThe front panel display shows working status during startup and normal operation. The diagram below shows the sequence in which the Startup and Operating screens are displayed or can be viewed. The details of all items can be found in the following sections.

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Normal OperationIndicate the current status of system operation.

○A Main Page

○B Future information about system

○C Logged Data

○D The unit operation time

○E Equalization voltage and countdown days

Operation Time (H)

10Hours

Logged Data

Press Ent to Display

Information

Press Ent to Display

12V HT:25℃ 10A

10Ah Night

Equalize 14.3V 28d

Equalization Turn on

○A ○B ○C

○D ○E

Information Page

○A PV array and open circuit voltage ○B Battery temperature and voltage ○C Maximum and minimum Battery voltage

○D Accumulated over a period of time data.

Press the Enter button for two seconds to clear information. ○E The totally energy collected from start

○F Fault information about state

Press U/D to Select

Information

PV array: 112V

PV VOC: 140V

BTS: 25℃ Valid

BVS: 12V Valid

Max Bat.V: 15V

Min Bat.V: 12V

Resettable: 50Ah

Resettable: 30KWh

Total Energy Harvest

30KWh 50Ah

Fault: none

Alarm: none

○A ○B

○C

○D ○E

○F

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Logged Data PageThe Solar Charger will accumulate operating data for later review in the Logged Data Page. In this page, you can check the daily log data. The charger will store log data of up to 60 days and the oldest log files will be replaced by the latest input.In the Logged Data Page, the current day is “today”; the day before is”day-1”.Refer to the below switch definition to select the information.

Press Set to Select

Logged Data

Today

Battery 12V Vmin

Today

Battery 15V Vmax

Today

PV Array 50 Vmax

Today

Charge 240Ah

Today

Charge 30Wh

Today

Max. Power 1200W

Today

Max.Batt Temp 25℃

Today

Min.Batt Temp 25℃

Today

Max. HS Temp 25℃

Day-1

Battery 12V Vmin

Day-1

Battery 15V Vmax

Day-1

PV Array 50 Vmax

Day-1

Charge 240Ah

Day-1

Charge 30Wh

Day-1

Max. Power 1200W

Day-1

Max.Batt Temp 25℃

Day-1

Min.Batt Temp 25℃

Day-1

Max. HS Temp 25℃

Day-60

Battery 12V Vmin

Day-60

Battery 15V Vmax

Day-60

PV Array 50 Vmax

Day-60

Charge 240Ah

Day-60

Charge 30Wh

Day-60

Max. Power 1200W

Day-60

Max.Batt Temp 25℃

Day-60

Min.Batt Temp 25℃

Day-60

Max. HS Temp 25℃

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4.5 ProtectionsPV Array High Voltage ProtectionSolar input will be cut off once the array open circuit voltage reaches 150V/100V. When PV array voltage drops to lower than 147V/98V, the system will recover automatically.Battery High Voltage ProtectionThis protection will be activated when battery voltage is over 16V in the 12V system at a battery temperature of 25˚C. The controller will disconnect the solar input and emit a High Voltage Disconnect alarm. This protection is useful when deploying with external charging sources in the system. When the battery voltage returns to 14.5V at 25˚C, the system will automatically recover.

Battery OVP Setpoint: 16V; Recovery Setpoint: 14VMultiply 2X for 24 Volt systems, 4X for 48 Volt systems.Temperature Compensation Coefficient :-5mV/˚C/Cell

Over Temperature ProtectionWhen the heat sink of Solar Charger reaches 75˚C, the unit will reduce its output current to ensure components rating are not exceeded.

6705

10152025

0

2412

364860

69 817977757372 83

The Solar Charger will stop if the heat sink temperature of battery exceeds 80˚C (60˚C). When the heat sink temperature returns to 55˚C(40˚C), the unit will automatically recover.

4.6 Inspection and MaintenanceThe following inspections and maintenance procedures are recommended to be carried out at least twice a year for best performance.• Check all terminals. Inspect for loose, broken, or corroded connections.• Make sure all wire clamps and tie-downs are secured.• Make sure the controller is mounted in a clean, protected environment; free from dirt,

insects, nests, and corrosion.• Make sure enclosure ventilation and air flow holes are all free from any obstructions. • Make sure the Remote Temperature Sensor (if deployed) is secured to the RTS

terminals.

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5. Troubleshooting

Symptom Possible Cause Correction Action

Completely dead, no Display.

Battery voltage is too low. The battery voltage must be more than 9V.

The external fuse has blown. Check and make sure the external fuse is intact.

Battery connected with wrong polarity. Check the wiring of battery.

Low array output. Input and output voltages read about the same.

Solar array P mpp is lower than the normal battery voltage. The charger is still charging, but not charges at Vmpp.

Check the reconfiguration of the array.

Load cannot operate Load output current protection.

Remove some loads. Output must not exceed 25A and do not put any AC inverter on the load terminals.

Heatsink over temperature protection.

Heatsink temperature is too high and the unit stops working, The Solar Charger will recover once cooled down.

Load output is turned off due to short circuit.

Disconnect loads and check total power consumption again.

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6. Specifications

Model SCUN25A SCUN60AElectricalMax. Charge Current 25Amps 60AmpsMax. PV Operating Voltage 80VDC 120VDCMax. PV Open Circuit Voltage 100VDC 150VDCPeak Efficiency 98% 99%Nominal System Voltage 12, 24VDC 12, 24, 34, 48VDCBattery Operating Voltage Range 8~32VDC 8~64VDCMaximum Self-Consumption 2.5WTransient Surge Protection 1500Watts/Port 4500Watts/PortBattery ChargingCharging Algorithm 4 StagesCharging Stages 4 Stages (Bulk, Absorption, Float, Equalize)Temperature Compensation -5mV/˚C/Cell(25˚C Ref)Temperature Compensation Range -30˚C to +80˚CTemperature Compensation Points Bulk, Absorption, Float, Equalize ,HVPMechanicalDimensions (H×W×D) 125×257×55mm 342×257×56mmWeight 1.31Kg/2.89lbs 3.95kg/8.71lbsMax. Wire Size 8AWG 1AWGEnclosure Type 1 (indoor and vented) IP30Electronic ProtectionsSolar Side Overload, Short Circuit, High VoltageBattery Side High Voltage, Low Voltage, High TemperatureLoad Side Overload NOLightning and Transient Surges YESReverse Current at Night YESEnvironmentalAmbient Temperature -40°C to +50°CSafety & EMCLVD EN60950-1

EMI FCC Part 15, ICES-003, ANSIC63.4, EN61000-6-4, EN55022, CISPR11, CISPR22, AS/NZS CISPR22 Class A

EMS IEC61000-4-2, IEC61000-4-3, IEC61000-4-4, IEC61000-4-5, IEC61000-4-6, EMS IEC61000-4-8, EN61000-6-2

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7. WarrantyThree years of global warranty(two years global warranty for LCD) is provided for MPPT Solar Charger Series under normal operation. Please do not change any component or modify the unit as it may forfeit the warranty provided by CyberPower.WARRANTY EXCLUSIONS AND LIMITATIONSThe warranty does not apply to any Product or Product part that has been modified or damaged by the following:Damage by accident, negligence, abuse or improper use;PV or load currents exceeding the ratings of the product;Unauthorized product modification or attempted repair;Damage occurring during shipment;Installation or Removal;Alteration or Disassembly;Normal Wear and Tear;Accident or Abuse;Corrosion;Lightning;Repair or service provided by an unauthorized repair facility;Operation contrary to manufacturer product instructions;Fire, Floods or Acts of God;Incidental or consequential damage caused by other components of the power system;Any product whose serial number has been altered, defaced or removed;Any other improper usage which is not foreseeable by CyberPower.

DISCLAIMERUnless specifically agreed to in writing, CyberPower systems:(1)Makes no warranty as to the accuracy, sufficiency or suitability of any technical or other information provided in its manuals or other documentation.(2)Assumes no responsibility or liability for loss or damage, whether direct, indirect, consequential or incidental, which might arise out of the use of such information. The use of any such information will be entirely at the user’s risk.THIS LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY APPLICABLE TO CYBERPOWER PRODUCTS. CYBERPOWER EXPRESSLY DISCLAIMS ANY OTHER EXPRESS OR IMPLIED WARRANTIES OF ITS PRODUCTS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. CYBERPOWER ALSO EXPRESSLY LIMITS ITS LIABILITY IN THE EVENT OF A PRODUCT DEFECT TO REPAIR OR REPLACEMENT IN ACCORDANCE WITH THE TERMS OF THIS LIMITED WARRANTY AND EXCLUDES ALL LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION ANY LIABILITY FOR PRODUCTS NOT BEING AVAILABLE FOR USE OR LOST REVENUES OR PROFITS, EVEN IF IT IS MADE AWARE OF SUCH POTENTIAL DAMAGES. SOME STATES (OR JURISDICTIONS) MAY NOT ALLOW THE EXCLUSION OR LIMITATION OF WARRANTIES OR DAMAGES, SO THE ABOVE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU.

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8. AppendixWire Size and LengthBelow is the maximum wire length for a voltage drop of less than 3% given 60A charging current for 12V system application. Refer to the maximum current in the table, and the wiring distance from the PV array (and Battery) to the solar charger, then find the wire size required at top row of the table. These wire sizes are not approved to be installed in the controller, but may be used external to the controller (using a splicer block) to reduce voltage drop and improve performance.

Wire Length In Feet

Amps 14AWG 12AWG 10AWG 8AWG 6AWG 4AWG 2AWG 1/0 2/0

4 10 17.5 27.5 45 72.5 114 180 290 360

8 5.5 8.5 15 22.5 35.5 57 90 145 180

10 4.5 7 12 18 28.5 45.5 72.5 115 145

15 3 4.5 7 12 19 30 48 76.5 96

20 2 3.5 5.5 9 14.5 22.5 36 57.5 72.5

25 1.8 2.8 4.5 7 11.5 18 29 46 58

30 1.5 2.4 3.5 6 9.5 15 24 38.5 48.5

40 - - 2.8 4.5 7 11.5 18 29 36

50 - - 2.3 3.6 5.5 9 14.5 23 29

60 - - 1.7 2.8 4.4 7.0 11.2 17.8 22.4

IMPORTANT:For 24V system, multiply distance by 2.For 48V system, multiply distance by 4.

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Error Codes IndicationRefer to the table below of the LED status indicators for understanding of the system operation error.

LED(R) Instruction Description

PV HVP PV array high voltage protection

Bat.Lack Battery low voltage protection

Bat.HVP Battery high voltage protection

Bat.fail Battery Bad

HeatSink OTP Heatsink Over Temperature Protection

BTS OTP Battery Temperature Protection

Load OCP Load over current protection

Load Short Load short circuit protection

Setting Err Battery voltage and setting voltage is not conformable

IMPORTANT:

Flash Per Second R: Red Light On

Light Off G: Green Light On

Light On O: Orange Light On

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AbbreviatedInitialization Setting

CyberPower SystemRenewable Energy

Battery Voltage Auto scan

Battery Voltage 12V

Battery Voltage 48V

Charge Mode(Gel) Mode 1

Charge Mode(Flooded) Mode 6

Equalization SetupAutomatic Countdown

Equalization SetupAutomatic Countdown

Equalization SetupForce Equalization

Charge Mode(Gel) Mode 1

Charge Current Setup60A

Save Setting And Restart



Press for 2 SecondsSetting





Setting

Setting

Setting

Setting

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Load Control Setting

CyberPower SystemRenewable Energy

Low Volt DisconnectLVD Sel 1



Adjust Load TimingDisable

Adjust Load Timing2 Hours

Adjust Load Timing10 Hours

Adjust Load TimingAll Night

Save Setting And Restart

Press for 2 SecondsSettingEnter +



Setting

SettingAdjust Load Timing

Disable

Note

Note

Note

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K01-0000328-00

MPPT Solar Charger Series

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