Item #: PMACBL275
Price: $1,695.00
    Points to Purchase: 242143
    Availability: Available
    Usually ships In 3-9 business days (sooner, if drop-shipped)
    Nominal Voltage:


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    F/R Speed:


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    The Mars Brushless PMAC kit will convert your gas or diesel engine to clean, silent electric propulsion! This kit is designed for inboard or outboard electric marine drive system conversions (specifically sailboats or light boats), but is also suitable for many other applications. Electric drive systems of this power usually cost $4,000 and up, but this pre-assembled kit makes it affordable at about a third of the cost.

    Although this kit is pre-assembled, there are certain tasks that you will need to do prior to use. You will need to connect the motor, check all the nuts, bolts, and screws to make sure they have adquate tightness after shipping, and assemble and connect your battery pack.

    Variable Throttle for smooth speed control
    Brushless Motor design makes brush maintenance a thing of the past.
    Easy forward and reverse switching with a flip of a switch
    Motor and Controller support Regen which means with an appropriate prop this system can recapture energy to help recharge the battery pack. So under a heavy sail this system can be generating power off the dragging prop.
    Drive motor can be mounted inboard OR outboard.
    *Pre-assembled and tested releiving you of any guesswork.

    Kit Includes
    Mars Brushless PMAC motor
    Gen4 Controller
    Pot box throttle
    Foreward/Reverse switch
    Ignition key
    Wiring harness

    Motor Specifications
    Voltage: 24-48 VDC
    Power: 15 Hp peak, 6 Hp cont.
    90% EFFICIENCY for much longer battery life.
    Commutation is accomplished with an internal Hall Cell assembly, connected to the 6-pin external wire harness.
    Voltage Constant: 70 RPM/VDC.
    Torque Constant: 1.20" lbs/amp.
    Max Motor Current: 300 A/1min.
    Weight: 22 Lbs.
    Dia. 8".

    Controller Information
    The Gen4-series represent the absolute latest design concept for compact and reliable AC Controllers. They feature the smallest footprint in the industry for their power capability. The high efficiency of these controller makes it possible to integrate them into very tight spaces without sacrificing performance. The design has been optimized for the lowest possible cost while maintaining superior reliability in the most demanding applications.

    The Gen4 controllers are designed to control either AC Asynchronous motors or PMAC Synchronous motors. This feature allows users to select optimal motor solutions for any application. Both UVW and encoder AB inputs are provided for maximum flexibility.

    Sealed IP66 enclosure
    Integrated logic circuit (I/O)
    Advanced flux vector control
    Autocheck - system diagnostics
    Sensorless control (depending on application)
    CANopen product

    Controller Specifications
    Nominal Voltage: 36-48V DC
    Operating Voltage: 19.3-69.6V DC
    Continuous Current (120s): 110A
    Current (120s): 275A
    Boost (10s): 330A

    Please note: Due to the high RPM of the Mars Brushless motor, we recommend using a gear reduction system rather than direct-drive. This will improve efficiency, provide proper torque and cooling, and prevent cavitation. Typical reduction is around 3:1, but will depend on the required prop RPM needed to reach hull speed. Proper reduction will enable the motor to spin your prop at the hull speed RPM of your prop when it is spinning at its max RPM. This number can be estimated using the 70 rpm/volt constant (48 volts * 70 rpm/volt ~ 3400 rpm max). *Appropriate prop required based on motor rpm and the boats hull speed.

    Please note: There is a two week lead time for programming after the order is processed.


    PMAC Technical Drawing

    Sevcon Gen4 Data Sheet