TECHNICAL INFORMATION
Max. Input Current
30A dc
Max. Input Open Circuit Voltage (Voc)
65Vdc
Max. Load Current
30Adc
Adjustable Charge Voltage(Bulk)
13.8-14.8V / 27.6V-29.6V
Adjustable Charge Voltage(Float)
13.0-14.2V / 26.0V-28.4V
Low Voltage Disconnect
11.0 / 22.0V dc ±2%
Auto Reconnect Voltage
12.0 / 24.0V dc ±2%
Output Voltage
12/24V dc
Typical Idle Consumption
<50mA dc
Operating temperature
-20°C/+50°C
Remark: ISC3042 is suitable for 12V or 24V system, you can use a 24V solar panel to charge a 12V
battery, but 12V solar panel cannot be used to charge a 24V battery.
Charging
Curve
Bulk Absorption Float
Bulk: This is the first stage (Constant Current) where the battery is in a low charge state. During this stage
the controller delivers all of the available solar power to the Battery system.
Absorption: In this stage (Constant Voltage) the controller charges at a constant voltage as the amount
of current required to charge the battery is decreasing. The constant voltage regulation prevents
overheating and excessive battery out-gassing; this stage will end when the battery charge current
reduces to below 3 Amps OR after 3 hours of entering absorption mode.
Float (Maintenance): After the battery is fully charged, the controller reduces to a lower Constant Voltage
setting to maintain the Battery (also called trickle charge).
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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