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IOTA Engineering DLS-75 75A, 12V AC Battery Charger

IOTA Engineering DLS-75 75A, 12V AC Battery Charger
IOTA Engineering DLS-75 75A, 12V AC Battery Charger
Item code Brand name Model number Amps
IOTDLS-75 IOTA Engineering DLS-75 75A

Battery Charger / Power Converter

The DLS series power converter/battery charger from IOTA Engineering converts 120 volts nominal A.C. to 13.6 volts D.C. As a power supply, its tightly controlled regulation allows the user to operate any 12 volt nominal D.C. load up to the converter’s rated output current. As a battery charger, the converter will maintain the battery, delivering its full-rated current when the battery capacity falls sufficiently low. The voltage is set to deliver its maximum current for the necessary period of time that minimizes undue stress to the battery caused by heating of its cells. This helps to ensure the longest possible life of the battery. Over time, as the battery nears its full capacity, the converter will float-charge the battery to prevent self-discharge of its cells.

DLS-75 Power Converter
The DLS-75 features a Two-Step Voltage Jack which allows switching from a long-term float voltage of 13.6vdc to 14.2vdc for rapid charging by simply inserting the dual voltage plug (included) into the jack.

The DLS-75 is also available with an IQ smart-controller already integrated into the unit which converts the charger into a 3-stage "smart" charger, increasing the performance of your DLS-75.

Model Specifications DLS-90 DLS-75 DLS-55 DLS-45 DLS-30 DLS-15
DC Output Voltage (No Load) approx. 13.6 V (DC) 13.6 V (DC) 13.6 V (DC) 13.6 V (DC) 13.6 V (DC) 13.6 V (DC)
Output Voltage Tolerance (No Load) + or - .7% + or - .7% + or - .7% + or - .7% + or - .7% + or - .7%
Output Amperage, Max Continuous 90 Amps 75 Amps 55 Amps 45 Amps 30 Amps 15 Amps
Output Voltage (Full Load) approx. >13.4 V (DC) >13.4 V (DC) >13.4 V (DC) >13.4 V (DC) >13.4 V (DC) >13.4 V (DC)
Maximum Power Output, Continuous 1210 Watts 1000 Watts 740 Watts 600 Watts 400 Watts 200 Watts
Ripple and Noise <150 mV rms <100 mV rms <50 mV rms <50 mV rms <50 mV rms <50 mV rms
Input Voltage Range 108 - 132 AC 108 - 132 AC 108 - 132 AC 108 - 132 AC 108 - 132 AC 108 - 132 AC
Input Voltage Frequency 47 - 63 47 - 63 47 - 63 47 - 63 47 - 63 47 - 63
Maximum AC Current @ 108Vac 21 Amps 17 Amps 13 Amps 11 Amps 7 Amps 3.5 Amps
Typical Efficiency >80% >80% >80% >80% >80% >80%
Max Inrush Current, Single Cycle 40 Amps 22 Amps 20 Amps 20 Amps 16 Amps 8 Amps
Short Circuit Protection Yes Yes Yes Yes Yes Yes
Overload Protection >100% >100% >100% >100% >100% >100%
Line Regulation 100 mV rms 100 mV rms 100 mV rms 100 mV rms 100 mV rms 100 mV rms
Load Regulation <1.5% <1.5% <1.5% <1.5% <1% <1%
Thermal Protection YES YES YES YES YES YES
Working Temperature Range 0 - 40C 0 - 40C 0 - 40C 0 - 40C 0 - 40C 0 - 40C
Storage Temperature -20 to 80C -20 to 80C -20 to 80C -20 to 80C -20 to 80C -20 to 80C
Withstand Voltage 1240V @ leads 1240V @ leads 1240V @ leads 1240V @ leads 1240V @ leads 1240V @ leads
Dimensions 10" x 6.5" x 3.5" 10" x 6.5" x 3.5" 7" x 6.5" x 3.5" 7" x 6.5" x 3.5" 7" x 6.5" x 3.5" 7" x 6.5" x 3.5"
Weight 7.8 lbs 7.8 lbs 5.5 lbs 5.5 lbs 5.5 lbs 4.0 lbs


The DLS series power converter/battery charger is designed with high quality components to help ensure years of continuous use. The DLS series is protected by multiple protection features for a long, trouble-free life. 1) Reverse Battery Polarity Protection. 2) Brown-Out Input Protection. 3) Over-Current Protection - cycle by cycle peak limiting as well as rated current limiting to maximize the life of the converter. 4) Over-Temperature Protection. In addition, it is designed with a unique “proportional” fan control circuit. Fan speed is directly proportional to the converter’s internal ambient temperature. This enables the fan to turn on and off very slowly, minimizing unwanted fan-starting noise.


The DLS series power converter/battery charger is warranted from defects in materials or workmanship for two years from date of retail purchase, and limits the remedies to repair or replacement. This warranty is valid only in the continental United States and Canada.


There are no components within the DLS unit that, in their normal operation, produce arcs or sparks. However, all electronic devices have some potential for generating sparks in the event of failure. Therefore, never install this device in the same compartment with flammable items such as gasoline or batteries.

The DLS battery charger/power supply can be mounted in any position within an enclosed or interior compartment. Provide sufficient air space to allow unrestricted airflow in and around the unit.

Disconnect the positive side of the battery before installation. Connect the positive (red) and negative (black) terminal lugs to battery or load. Always use the proper size wire based on the amperage of the converter and the battery. When connecting to a battery, a breaker should be installed within 18” of the battery, connecting the battery positive to the line side of the breaker, and the DLS to the load side. Connect “Chassis Bonding Lug” on the DLS to vehicle chassis or other grounding source.

Plug the DLS A.C. input cord into a 120 volt 3 wire grounded source. See chart for maximum current draw and required input voltages.

The DLS Battery Charger/Power Supply is protected against reverse polarity on the DC output. If a battery or the DLS is hooked up incorrectly, the fuses will blow and can be easily replaced. Always use the same size and style fuse that came with the converter. To change the fuses, use a screwdriver to loosen the screws and remove the fuses. Always replace the fuses with the same type and rating. After inserting the new fuses, tighten the screws firmly. DO NOT OVERTIGHTEN.

Rear View


Charge Controller Options are designed for DLS units that DO NOT have the IQ SMART CONTROL FEATURE internally integrated. It is not necessary to utilize the Dual Voltage Jack or External IQ Controller for IQ-integrated DLS units.

The two-step voltage jack (located on the top of the DLS on the fan-end of the unit) allows switching from a long-term float voltage of 13.6vdc up to 14.2vdc. When the included dual voltage plug is inserted in the jack, the voltage rises to 14.2vdc for occasional fast charging. When the plug is removed, the voltage drops to 13.6vdc to reduce battery water loss. WARNING: To avoid battery damage, remove the Dual Voltage Plug when quick-charging is complete.

DLS power converters/chargers are designed to accommodate the IQ smart charge controller. The microprocessor- controlled charger turns the DLS charger into an “automatic” 3-stage “smart charger,” giving the user the benefit of Bulk, Absorption, and Float stage charging. This increases the charging capacity of the DLS charger, decreases charge times and insures proper and safe battery charging without over-charging. The IQ controller inserts into the dual voltage jack on the DLS.

Mounting Diagram



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