Abso DC to DC Battery Charger 12V 30A (DMT1230) 12V 50A (DMT1250) 24V 30A (DMT2430) Owner’s Manual
For safe and optimum performance, the KISAE Abso DC to DC Battery Charger must be used properly. Carefully read and follow all instructions and guidelines in this manual and give special attention to the CAUTION and WARNING statements. PLEASE KEEP THIS MANUAL FOR FUTURE REFERENCE Disclaimer While every precaution has been taken to ensure the accuracy of the contents of this guide, KISAE Technology assumes no responsibility for errors or omissions.
Table of Contents 1. INTRODUCTION ..................................................................................................5 2. PRODUCT DESCRIPTION .................................................................................5 3. UNDERSTANDING THE UNIT ............................................................................5 4. INSTALLING THE CHARGER ............................................................................8 5. CONNECTING THE CHARGER .............................
IMPORTANT SAFETY INFORMATION This section contains important safety information for the KISAE Abso DC to DC Battery Charger. Each time, before using the unit, READ ALL instructions and cautionary markings on or provided with the unit, and all appropriate sections of this guide. The unit contains no userserviceable parts. See Warranty section for how to handle product issues.
1. INTRODUCTION Thank you for purchasing the KISAE Abso DC to DC Battery Charger. With our state of the art, easy to use design, this product will offer you reliable service for providing a multi-stage, multi-input battery charger to charge the different types of batteries you have installed in either your home, boats, RV caravan, 4WD or commercial vehicle. This manual will explain how to use this unit safely and effectively. 2.
Smart Charging Feature The DC to DC Battery Charger will regulate its output based on the loads connected to your House Battery Bank. This function is important to maintain the life of your battery banks as some other battery chargers mistake loads for discharge and continue to keep the batteries in the bulk or absorption stage for extended periods of time, which will damage the battery bank.
Lithium Type House Battery Bank Voltage and Current Setting: WARNING: FIRE HAZARD. When choosing the Lithium Battery type, you can set to a wide range of charge/float voltage. Please consult the battery manufacturer on all the values. Using the wrong voltage setting may overcharge and damage the battery and may cause a fire. The Charging Voltage, Float Voltage, Charging Current and Termination Currents, are user selectable.
4. INSTALLING THE CHARGER WARNING: KISAE Technology recommends that all wiring be done by a certified technician or electrician to ensure adherence to the applicable electrical safety wiring regulations and installation codes. Failure to follow these instructions can damage the unit and could also result in personal injury or loss of life.
Recommended Cable Length, Size and Fuse Protection: Recommended Fuse/Circuit Breaker Size, Wire Length and Size DMT1230, 2430 DMT1250 CH 1 House Battery Bank 40A, <5 ft, AWG #8 / 10mm2 60A, <5 ft, AWG #6 / 16mm2 2 CH 2 Solar Array/Panel (Note1) 12V/300W: 20A, <20 ft, AWG #12 / 4mm 40A, <20 ft, AW G #8 / 10mm2 24V/300W:10A <20 ft, AWG #14 / 1.
6. UNIT OPERATION Unit ON/OFF A Unit ON/OFF switch is located at the DC Input/Output panel of the unit. Switch to ON position to activate the charger and switch to OFF position to turn the unit off when not in use. Understanding the Charging Mechanism The Charger is powered by the battery connected to House Battery (CH1). The unit requires a minimum of 8Vdc to operate. The unit display will turn off automatically to save power when the two Input channels CH2 and CH3 are out of operating range.
*Note: The charger limits the input current of CH2 to 30A maximum. If a 12V solar panel is used, the maximum solar input power is around 500W. You can however “overdrive” the MPPT controller. Please note that doing this is partially an economic decision. You can install more power than the controller can use and this will contribute to better power availability. KISAE suggests a total maximum overdrive of 20% (total 600w).
Digital Display • During the charging process, the display shows ‘CH1’ charging voltage, current, and status repeatedly, and ‘CH2’ or ‘CH3’ is solid to indicate the recent active input source. If the other input channel (‘CH3’ or ‘CH2’ respectively) is available and its voltage is above its corresponding ‘StartUp” voltage threshold, the icon will be flashing.
constant float voltage to fully top up and maintain the battery in a fully charged state. The charger will automatically restart the full charging cycle if it senses the battery bank is discharged to lower than 12.5V for lead acid batteries and 13.3V for lithium batteries. Similar to Three-Stage Charging, the Two-Stage Charging (Mode 2) has only Bulk and Absorption charging stage. Charger will terminate battery charging once it reaches the Absorption to Float (“L”) current setting.
the battery equalization is enabled, the charger will automatically fully charge the battery bank and will then follow with 1 hour of equalization. Check the battery electrolyte level during the equalization period. If necessary, refill with distilled water only. All cells should have similar electrolyte levels. If distilled water is added, batteries must undergo a complete charge cycle.
E03 E04 E05 E06 E07 A01 A02 REV D If you have this error: • Confirm the voltage of your CH3 Start Battery is above the corresponding Start-Up voltage above • Check you have not left the “Priority” (Override) feature activated (Manual or Auto), when having no engine and so its alternator not running. • Check the battery cable from the Start Battery is properly sized, to avoid excessive voltage drop. • Make sure there is not any loose terminal or blown fuse.
7. SPECIFICATIONS Note: Specifications are subject to change without notices.
8. WARRANTY One Year Limited Warranty The limited warranty program is the only one that applies to this unit, and it sets forth all the responsibilities of KISAE. There is no other warranty, other than those described herein. Any implied warranty of merchantability of fitness for a particular purpose on this unit is limited in duration to the duration of this warranty.
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