For the boater who loves to be on the water but does not like the gas smell, the noise, breakdowns and the maintenance reguired by a gas powered boat, replacing the old outboard with an electric Pure Outboard by Pure Watercraft may be the solution. It can be the choice of environmentalists for fossil fuel use reduction, protecting waterways from gas and oil pollution, air from emissions, prevention of invasive species spread, and noise pollution for marine life. It would be even better if the batteries could be solar charged.
The advantages of the Pure Outboard are that it:
- creates almost no noise so is quiet enough to allow for normal-volume conversations at full speed
- weighs 80 lbs so is easy to install
- has no fluids to keep filled or to check
- needs almost no engine maintenance for ten or more years
- has no clogging seawater loop that spreads invasives
- when docked is plugged in so it is always ready to go with no fuel dock runs necessary
- is especially necessary in areas which prohibit gas powered outboards on lakes and inland waterways for environmental reasons
- works with any standard steering cable system.
Designed to replace a 9.9 to 35 hp outboard motor, the propeller diameter is larger than props on other same power range outboards and has about 30 percent higher efficiency propulsion due to running at about half the RPMs. The 9.9 HP version can replace a conventional 13 HP outboard; a 25 HP version can replace a conventional 33 HP outboard. Versions available are 9.9HP, 15HP, 20HP, or 25HP. Since the propeller must match the hull for this efficiency, multiple propellers are available targeted to common hull types.
Consistent communication between the matched outboard and battery system confirms all systems are in normal state before powering the high voltage propulsion. Cell failures are rare and not so severe due to small, high quality lithium-ion battery cells from a high volume supplier. Propagation risk is minimized by the special thermally conductive phase change material which prevents overheated cells in normal use absorbing a rare cell failure heat. This material also extends battery pack life by distributing the temperature throughout the pack evenly while charging cells.
The Pure Outboard is rated to IP67 standards of water resistance and thermally managed to prevent overheating and premature battery pack aging. Running time is dependent on the hull, propeller, and speed. For example, a low-wake launch with a single battery pack can go 6 hours at a constant 6 mph or about 50 minutes at 12-13 mph. Two packs combined double the range. It takes about 3.5 hours per pack to recharge the batteries with the standard MultiCharger connected to a 120V outlet or the high powered MultiCharger can charge about 8 times faster using a 240V 40A outlet.
For those who fish, the quiet motor prevents fish from hearing the boat approach from miles away and it does not affect fish hearing sensitivity for days afterward. There is no need to have two motors, one to get to and from the fishing site and a second lower speed motor for fishing. The Pure Outboard can move about as fast as a 35 HP outboard at a noise level much lower than conventional internal combustion engine outboards. There is no need to turn the motor off to be able to talk.
Cost is expected at a little more than a new conventional outboard, with one battery pack at about one dollar per watt-hour and one charger needed. Read the frequently asked questions and pre-order on the website. The engineering prototype is running now and pilot production is expected in late 2016 with higher volume production by the end of 2017.
In 2012, the makers of Pure Watercraft created a 21 foot electric runabout with 280 HP of continuous power that runs up to a continuous 48 MPH and pulls a water skier. See the videos on the website.