Cummins Onan Connect Series Accessory Battery Charger 15A | Part 0300 5878 01
Cummins Power Generation

Cummins Onan Connect Series Accessory Battery Charger 15A | Part 0300-5878-01


Cummins Power Generation fully automatic battery chargers - using switched mode power electronics - are constant voltage/constant current chargers incorporating a 4-stage charging algorithm.  Designed for use in applications where battery life and reliability are important; these chargers, complete with built-in equalize charge capability, are ideal for stationary or portable starting battery charging service.  To achieve optimum battery life, a 4-stage charging cycle is implemented.  The four charging stages are trickle, bulk, absorption and float.  The trickle stage safely charges overly discharged batteries.  It protects a damaged or shorted battery from excessive current.  During bulk charge a constant current is applied to quickly restore the maximum battery charge level in the shortest amount of time.


Protection: All models include a 20 amp DC output breaker.  Re-settable breakers are used for input voltages 240 VAC and lower.  For over 240 VAC branch circuit rated fuses are used.
Easy Installation:  Clearly marked terminal blocks and panel knockouts provide convenient connections of input and output leads.
User Display:  Output voltage and current, fault information and configuration options are indicated on the alphanumeric display.
Monitoring:  An LED indicates the condition of the charger.  Green indicates normal charging operation, amber indicates equalizing and red indicates a fault condition.
Adjustable Float Voltage:  Float voltage can be set through the alpha-numeric display for optimum battery performance and life.
Temperature Compensation:  An optional external sensor is available for temperature compensated battery charging.
Faults:  The charger senses and annunciates the following fault conditions: Input overvoltage, input undervoltage, AC power loss, batttery overvoltage, battery undervoltage, charger circuitry over temperature, battery over temperature, unrecoverable battery and overload/overcurrent.  Includes 30 volt/2 amp isolated contact for common alarm.
Parallel Redundant Operation:  Charges can be operated in parallel for redundant reliability or additional charging capacity.
Vibration Resistant Design:  Complies with UL 991 vibration resistance requirements.
UL 1236 (BBHH) Listing:  For use with lead acid batteries in generator set insatallations.  Also suitable for use with NiCad, gel and AGM batteries.

9.75"L x 5.56"W x 6.14"D
Note: Mount inside for Connect Series gensets

Kit Includes: Battery Charger, Operators Manual and Instruction Sheet A003X677

Country Living
Comment by Jim C. on 9th Nov 2014

My Mom and Dad are both in their 80's and live in the country. With the installation of the 6551 I can rest assured that they will never be without power, heat, ac and water. this is a great unit and worked perfectly upon startup. Should have installed this a lot sooner for them.

By the way, my son-in-law also has one for his home. I live in a motorhome or I would have one also.

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