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Price: $3,500.00 MSRP |
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SKU/Item Number: MK2C10 |
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To contact us: |
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Phone at: (707) 849-2628 |
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ADVANCED MARINE electric pROPULSION |
Product Summary |
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The AMeP Mark II C motor is designed to replace small internal combustion engines in sailboats up to 35 feet and 15,000lbs displacement. Designed with a sealed external controller, the motor is fully enclosed in a sealed aluminum housing. The housing is the same structural housing as the Mark II B (see above PDF link), although additional space provisions will need to be made for the external controller module. The motor unit contains a brushless, permanent magnet variable speed motor in a watertight housing, operating at low speed and high torque to be coupled directly to an existing prop shaft. Auxiliary engines using a direct drive transmission have proven to work well with the direct drive electric motor. Auxiliary engines with reducing transmissions will require prop re-pitching to achieve the best result. Included external components required for operation consist of a 5k Ohm waterproof potentiometer for speed and direction selection, and a sealed switch for controller logic power. Additional meters can display current, voltage and temperature conditions, but are not included, and are not required for routine installations. The Mark II C motor weighs 54 pounds, including sealed controller module. All motor/controller wiring is included, as well as sufficient wire for most helm installations. Customer supplied items required for installation include one or two rigid two-piece shaft coupling, battery cables to the controller module, batteries and a charging system. The controller current limit and speed can be adjusted after installation. This can reduce prop cavitation at low speed, and limit current draw at high speed (ensuring economical battery discharge). The Mark II C system with an external Kelly controller (KBL301) allows for 24v to 48v operation. The Mark II C can provide 3kw at 24v, 4kw at 36v, and 5kw at 48v. Most existing props will provide functional maneuvering capacity. Matching a prop to the motor’s peak output speed will result in superior performance.
A 24v system will turn at 1000rpm no-load. Peak output will be at 750 to 800 rpm. If the motor cannot reach this speed, the prop pitch or diameter should be reduced. If the motor spins above 800 rpm at full throttle, the prop is too small, or under pitched.
A 36v system will turn at 1400 rpm no-load, and will provide peak power at 1050 to 1200 rpm.
A 48v system will turn at 1800 rpm no-load, and will provide peak power at 1400 to 1600 rpm.
Some installations with 48v systems never reach 1000 rpm at full throttle, yet have adequate power and speed for extended operation. Use of an over-pitched prop will result in rapid motor heating at high throttle settings or operation with heavy bottom growth. Unlike a diesel engine, reduced throttle can be used for extended operation with little adverse affect.
Under-pitched operation will have little adverse affect, other than reduced boat speed at full throttle. Very little energy is wasted by over-speed operation. An under-pitched or small prop system will have reserve power, useful for full throttle in a strong headwind or should bottom growth increase drag.
The wide efficiency band of AMeP motors will allow operation under most conditions. If the motors are pushed at full throttle for extended periods, excess internal heat will cause an undesired system shutdown. Both the Mark II B and C will reset within a few minutes. The systems are designed to deliver peak power for short periods during maneuvering, as well as continuous power at a reduced rate for cruising.
Operating an electric propulsion system at full power for extended periods can cause overheating, and will quickly deplete battery power reserves. Reduced power operation can stretch battery output up to twice the distance of full power operation.
Each installation is unique. Choosing an experienced installer will help. Individuals can be coached through general installation instructions. Aluminum extrusions and plates can be shaped with carbide power saws and drills. AMeP can provide isolation mounts, drilled angles, hardware and slotted plates used in many installations. Modification to the AMeP motor housing can be made to reduce interference issues.
We have not encountered an existing inboard which cannot be converted. Indeed, the electric motor body is so compact that we’ve added inboard power to an 18ft boat. AGM batteries can be positioned, even on their side, wherever convenient. |