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   IQ4 SMART CHARGE CONTROLLER Specification Sheet in PDF format Installation Manual in PDF format Warranty Information
IQ4 Smart Charge Controller for DLS Battery Chargers

The IQ4 Smart Controller provides intelligent automatic charging control for your DLS Battery Charger, keeping batteries fully charged and operating for long life. IQ4 Charge Controllers are available for any DLS Battery Charger model and are backed by IOTA's Two-Year Warranty. For 4-Stage Charging, use either the external IQ4 pendant or a DLS charger with built-in IQ4 control.

The IQ4 Charge Controller allows the DLS Series battery charger to operate as an automatic 4-Stage "Smart Charger," delivering the charge your battery needs at the time it needs it. The IQ4 uses four different charging modes to keep your battery in peak condition...

The Bulk Stage of the IQ4 allows the batteries to be charged from the full rated output of the charger (for example, a 12V charger will charge at a maximum of 14.8V). This increased charging period reduces the overall charging time of the battery.

After the Bulk Stage, the IQ4 then moves to the Absorption Stage (14.2V for a 12V battery). This mode will continue for up to 480 minutes (8 hours) to ensure that the battery receives a complete charge.

During the Float Stage, the IQ4 reduces the DLS charge voltage. This reduced voltage maintains the full charge while minimizing 'gassing' of the battery. The IQ4's float stage prevents boiling and bulging of the battery caused when the battery is exposed to higher charging voltages for too long.

If the batteries remain in a "float stage" for a seven-day period, the IQ4 will switch the DLS charger into a pre-programmed Equalization Stage. This protects the life of your battery by dissolving any sulfate layer on the battery's internal plates and avoids stratification that can occur when a battery has not been in use for extended periods.

IQ4 Smart Charge Controllers IQ4
Standard IQ Smart Charging pendant upgrades any 12V or 24V DLS battery charger to an automatic 4-stage charger.

54V IQ4
Modified for optimal performance with any 54V DLS battery charger.

IQ4 Parallel
Includes specialized cord for 4-stage charging control of two 12V or 24V DLS chargers operating in parallel.

The IQ4 can be easily installed by plugging the IQ4 cord into the Dual Voltage jack located on the DLS*. The IQ circuitry is then automatically engaged. NOTE: The cord provided with the IQ4 is only designed for use with the charge controller. Do not use the IQ4 with any cord other than one that is supplied with the unit.

(*location of the Dual Voltage Jack may vary depending on the DLS Model.)

If you are using an IOTA DLS Battery Charger that does not feature a Dual Voltage Jack, you can still attach an IQ4 Smart Charge Controller to your system...just contact IOTA's Customer Service Department for assistance.


12V Battery 24V Battery 48V Battery
Number of Cells

6 12 24
Bulk Phase
(2.466V per cell)

14.8V 29.6V 59.2V
Absorption Phase
(2.366V per cell)

14.2V 28.4V 56.8V
Float Phase
(2.266V per cell)

13.6V 27.2V 54.4V

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