Installation and Operating Instructions
Solar System Controller
ISC3020
About this manual
These operating instructions come with the product and shall be kept along it for all the life of the product
for a proper installation and usage of it.
Read these operating instructions carefully before use,
Keep them over the entire life of the product,
And pass then on to any future owner or user of this product.
This manual describes the installation, function, operation and maintenance of the solar system
controller ISC3020.
These operating instructions are intended for end customers. A technical expert must be consulted in
cases of uncertainty.
Safety
1. The solar controller may only be used in PV systems for charging and controlling Lead-Acid batteries.
2. No energy source other than a solar generator may be connected to the solar charge controller.
3. Do not connect any defective or damaged measuring equipment.
4. Follow the general and national safety and accident prevention regulation.
5. Never alter or remove the factory plates and identification labels.
6. Keep children away from PV systems.
7. Never open the device.
8. One set solar module can connect with one controller only.
9. Never touch bare cables ends.
Other risks
Danger of fire and explosion
Do not use the solar charge controller in dusty environments, in the vicinity of solvents or
where inflammable gases and vapors can occur.
No open fires, flames or sparks in the vicinity of the batteries.
Ensure that the room is adequately ventilated.
Check the charging process regularly.
Follow the charging instructions of the battery manufacturer.
Battery acid
Acid splashes on skin or clothing should be immediately treated with soap suds and rinsed
with plenty of water.
If acid splashes into the eyes, immediately rinse with plenty of water. Seek medical advice.
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Fault behaviour
Operating the solar charge controller is dangerous in the following situations:
The solar charge controller does not appear to function at all.
The solar charge controller or connected cables are visibly damaged.
Emission of smoke or fluid penetration.
When parts are loose.
In these cases immediately remove the solar charge controller from the solar panels and battery.
Function
This solar system controller is designed to
Monitor the state of charge of the battery;
Controls the charging process,
Control the connection/disconnection of loads,
Make sure Solar system works at proper condition.
Manual load switch with automatic re-start.
Operating the controller
The display shows a variety of system data by symbols and digits. Both buttons control all settings
and display windows.
1. Display and operation elements
LCD display for controller
information and messages.
Manual load switch, or
confirmation button in program
mode (Enter button)
Button for switching display
windows or calling up the
settings (Menu button)
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2. Display window
Symbols for current direction
Symbol for load
Symbol of Battery
Symbol for Question
Charging
Charging current
volume
Units display
Suitable battery voltage
Sun: day
Moon:night
4-Segment display for text and figures
Change the display windows with the left button; (e.g. for 12V battery)
1. The default window will show like below, battery voltage/capacity volume of the battery.
2.
Press “menu” button once to check charging current.
3. Press” menu” button again to display the load current.
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4. At default display mode, press “enter” button to control the load On or Off.
5. If solar module can not provide current or the current is less than 1Amp, last 5 minutes more,
controller will switch to Night mode.
6. When the output current is less than 1Amp, the LCD will always show C1.0A.
Function Introduction
1. PWM Charge control
Depending on the actual battery level, various charging procedures, float charging, boost charging
and equalization charging are automatically performed. The final charging voltage is temperature
compensated.
2. Deep discharging protection
If the battery falls below a specified charge level or battery voltage, the load output is disconnected
and the discharge of the battery is prevented. The set points of the deep discharging protection are
predefined and cannot be reset.
Installation
Only install the controller near the battery on a suitable surface. This surface should be solid,
stabile, even, dry and nonflammable.
The battery cable should be as short as possible(1-2m) and have a suitable cable diameter size
to minimize loss.(Recommended cable is 25 square mm and 2 m length)
Do not assemble this unit outdoors, the unit should be installed so that it is protected against
humidity, dripping, rainwater as well as direct and indirect warming (sunlight)
To ensure the air circulation for cooling, an area of 15cm on each side of the unit must be kept
free.
The LCD display should be protected against UV rays(e.g. sunlight). Long time exposure to UV
rays can permanently discolor the LCD
The solar charge controller may only be connected to the local loads and the battery by trained
personnel and in accordance with the applicable regulations.
Follow the installation and operating instructions for all components of the PV system.
Ensure that no cables are damaged.
Ensure that polarity of solar panel/battery/load is connected in proper way and use only insulated
tools.
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1. Mounting the solar charge controller
1.1 Do not mount the solar charge controller outdoors or in wet rooms
1.2 Do not subject the solar charge controller to direct sunshine or other source of heat.
1.3 Protect the solar charge controller from dirt and moisture.
1.4 Maintain a minimum clearance of 10cm below and around the device to ensure unhindered air
circulation
1.5 Mount the solar controller as close as possible to the batteries (with a safety clearance of at least
35cm).
2. Fix the solar charge controller
2.1 Mark the position of controller fix holes on the walls;
2.2 Drill 4pcs Ø6mm holes and insert dowels.
2.3 Fix the controller to the wall with the cable openings facing downwards, using 4 oval head
screws M4x35(DIN 7996).
Grounding
Grounding the unit is not technically required when installing a stand alone solar system. However, one
ground is possible for the PV array to be positive grounding.
This unit can ground positive only.
Install the solar system and operating mode
Connect the wires in the sequence from 1 to 6 according the above diagram; when
Disconnect the wires in the REVERSE sequence from 6 to 1 according the above diagram.
Use with 12V or 24V batteries, controller will detect voltage of battery automatically.
Never exceed the nominal ratings (see below technical data for reference).
Suggested cable length, 10m solar panel connection cable/2m battery connection cable/5m load
connection cable.
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TECHNICAL INFORMATION
Max. Input Current
30Adc
Max. Input Voltage (Voc)
45Vdc
Max. Load Current
30Adc
Over Charge Voltage
14.4/28.8Vdc±2%
Over Discharge Voltage
11.0/22.0Vdc±2%
Out put Voltage
12/24Vdc
Typical Idle Consumption
<20mAdc
Operating temperature
-20°C/+50°C
Charging Curve
Bulk: This is the first charging stage where the battery at low charge stage, typically 10%, receives the
majority of its charge. During this stage the battery brought to about 95% of its charger getting 100% of the
available solar power.
Pulse (Maintenance): At the end of bulk stage, typically when the battery reach 14.4 Volts, a maintenance
mode starts where the battery voltage can float between an high and low value fixed by the controller.
These values are temperature compensated in order to keep the battery at 100% charge stage in any
condition.
Protection functions
Overcharge protection
Deep discharge protection
Battery under-voltage protection
Solar panel reverse current protection
The following installation faults do not destroy the controller. After correcting fault, the device will
continue to operate correctly:
Overcharge protection
Deep discharge protection
Reverse polarity protection of load, panel and battery
Automatic electronic fuse
Short circuit protection of load and panel
Over voltage protection at panel input
Open circuit protection without battery
Reverse current protection at night
Overload protection
Battery over voltage shutdown
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Maintenance
The controller is maintenance-free. We strong suggest that all components of the PV system must
be checked at least annually,
Ensure adequate ventilation of the cooling element
Check the cable strain relief
Check that all cable connections are secure
Tighten screws if necessary
Terminal corrosion
Error Messages
Caution! Please do not open the controller or attempt to replace components when troubleshooting.
Improper maintenance can be hazardous to the user and the system.
If the controller detects errors or unauthorized operating states, it shows error codes on the display.
Error codes can generally be differentiated, whether there is a temporary malfunction, e.g. regulator
overload or a more serious system error that can be remedied by appropriate external measures.
Since not all errors can be simultaneously displayed, the error with the highest error number (priority)
is displayed. If several errors are present, the second error code is displayed after remedying the
more significant error.
The following meaning is assigned to the different error codes:
1.
Meaning: Battery polarity reverse warning
Remedy: Reconnect cable of battery in proper way.
2.
Meaning:
Battery is wrong.
Remedy: Check battery voltage it might be too low or too high, possible recharge battery manually. If
battery can’t be recharged, it might be deep-discharged. Consumer need change a new battery.
3.
Meaning: Module current too high.
Remedy: Reduce the load current or module power.
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4.
Meaning: Over current at the load output.
Remedy: Reduce the current of load.
Remark: If the current is reduced the controller does not work.
If either of the below situations arise, the unit has E4 problem:
1) If the load does not connect – Press the “Enter” button, LCD shows E4.
2) If the load is over 50W - Press the “Enter” button, load current will show 0.00A.
Please try to reset the unit by disconnecting all the connections, then hold on to the “Menu” button and reconnect
the battery connections to its +ve and –ve ports.
5.
Meaning: Solar module polarity reverses.
Remedy: Check connection of solar module and connect it in proper way.
6.
Meaning: Battery is open circuit or short circuit.
Remark: The display keeps blinking with 8888 and all the symbols.
Remedy: Check connection between Solar Charger Controller and the battery, and make sure they
are in good connection.
The Leading Edge in Solar Technology
Waste electrical products should not be disposed of with household waste
Please recycle where facilities exist
Check with your local authority or retailer for recycling advice
Specifications are subject to change without prior notice
Copyright reserved by ProVista Technology Limited
Version of Instruction manual 1.1
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