***Et-134 and wigwag throttles are on backorder until August***
Convert your 3-18 HP diesel engine to clean, quiet electric. Eliminate noxious diesel fumes and the frustration of filling up at the pump with the 5KW Brushless Kit featuring a Motenergy brushless motor and a 48V Curtis Controller that can produce up to 5HP continuous and often used to replace 10-15hp combustion engines! Enjoy your sailboat to the fullest, with a silent drive and truly fresh air.
This system is best for boats up to 6,000 pounds displacement. All our systems have reverse on-the-fly and contactor disable features. "Brushless" means that the motor does not have brushes that will wear out over time, nor will it be a dangerous source of ignition for on-board gas appliances. Larger boats may require a higher power AC or brushless motor. In the U.S. and Canada, brushed motors are only legal for marine use if onboard appliances and accessories use kerosene or diesel (not propane or gasoline) due to the potential for internal motor arcing.
With the Curtis controller, no reversing contactors are needed. Additionally, the controller has a regen feature than can allow current to be put back into the batteries from the spinning prop while under sail. This does depend on your sailing speed, prop design, and may not be possible in all applications, but is an adored feature for those who are able to utilize it.
A gear reduction is not always necessary, and largely depends on the size, efficiency, prop style, and desired speed of your vessel. However, due to the high RPM of the Motenergy Brushless motor, we recommend you consider a gear reduction rather than direct-drive to improve efficiency, provide proper torque, cooling, and help prevent cavitation. Typical reduction is around 2:1, but this ratio will depend on the required prop RPM needed to reach hull speed. Ideal reduction will enable the motor to spin your prop at the hull speed RPM of your prop when the motor is spinning at its max RPM. The ME1718 spins around 3500 rpm Max, at 48v.
What about Batteries? Most customers are happy with sealed, deep cycle lead acid, sourced locally to save on shipping. Use 4 in series to get 48v and 100 amp hour capacity minimum. Larger capacity will give a longer run time.
If you choose not to use a gear reduction, it's important to install a thrust bearing somewhere in line with the prop shaft, as most motors are not rated for axial/thrust loads on the shaft. Also note that a heatsink for the Curtis controller is recommended by the manufacturer.
- Motenergy ME1718 Sealed Brushless Motor.
- Controller: 48V Curtis 1232 (can also be programmed at 36v)
- Throttle (additional cost)- your choice of:
- ET-134 directional throttle. For harsh environments we recommend the ET-134 as the most robust option. Use the ET Actuator to connect to your existing throttle cable. ET-134 has a Neutral Detent, ET-126 is Spring Return.
- Wigwag throttle lever if not reusing your existing lever
- PB-8 throttle and Fwd/Rev Switch
- Tyco High-Quality Sealed Contactor
- Key Switch
- 200a Breaker
- Engage II Display (Will show voltage, rpm, current, SOC, motor and controller temp, and fault codes)
- Every kit is individually bench tested
- Complete wire harness with 10ft key and throttle cable lengths
- Wiring instructions
You may also be interested in the CAN Translator
Those of you that are still in the "research phase" of your conversion should visit one of the electric boats discussion groups and talk to others who are doing or have already done electric conversions.
E-Boat Modeling Spreadsheet (.xls) *Use this to calculate your power needs!*