Patrick,
To run your 28' powerboat on electric power I suggest 48 volt x 200 AH Lifepo4 battery packs for each motor and they would cost up to $4,000 each. Many people would consider that too expensive and not reasonable. I agree that is very expensive but your operating cost to run your boat would be 10% of the cost of your gas powered engines and there would be almost no maintenance. AGM batteries are less expensive but will not last as many discharge/recharge cycles. Please understand my electric conversion was successful but experimental and I really wanted a baseline of information to design a second generation more advanced electric system. Today you have drop-in electric propulsion systems that are proven technology. The limitations of electric boat propulsion should be acknowledged if you are not aware of them. Be aware that most electric boats cruise up to 5-6 mph or at hull speed. Having said that but always wanting to push the technology envelope you can get loads of power with an electric conversion and cruise along faster but you need lots of battery power and are limited in range before you have to recharge the batteries. Adding a genset will be too much weight although I have not done the math. What I used for my boat was 2 packs 48 volt x 100 AH and I was powering one motor. I have a serious passion to power any boat with electric power and I encourage you to take a close look at the possibilities.
John
Tue, Apr 19, 2011 at 5:49 AM, BD <bigdaddy69_77@yahoo.com> wrote:
Can you please clarify "some money?" How much for one of the drop in conversion units with appropriate battery power and charging needs?"Those who make peaceful revolution impossible, make violent revolution inevitable."
~John Fitzgerald Kennedy
From: John Raynes <johncraynes@gmail.com>
To: electricboats@yahoogroups.com
Sent: Mon, April 18, 2011 2:54:47 AM
Subject: Re: [Electric Boats] EP for larger cruisers?
Patrick,
I did an electric conversion a couple years ago to a Pacemaker 266 powerboat. I am happy to share my experience with you and give you a base line of data from sea trials. A place to start from anyway.My boat conversion to electric was a single screw inboard. She was set up with 2 battery packs of Lithium Iron Phosphate Batteries; I could cruise a couple of hours on a re-charge Do you have twin inboards or I/O's? If you have inboards with shafts, shaft seals, props, struts, etc you are ahead of the game. If you are starting from I/O's you might consider twin electric outboards. Just my professional opinion. There are several good drop in electric conversions units out there. Thoosa from Asmo Marine and Quiet Torque units from Electric Yacht seem to be the front runners. Be ready to spend some money on battery power and recharging.JohnOn Sun, Apr 17, 2011 at 7:18 PM, hiemc2 <pma2@bex.net> wrote:
Hello, my name is Patrick and I am new to the group.. My boat, a 1980 288 Cruisers Yacht VillaVee w/ Twin 454's... so you feel my pain! I have been trying find an example of a successful conversion for this type/size of vessel. So my initial question: Is there any examples of this type of conversion that someone might be aware of? I am not looking for specs or details at this point, just some insight to this application... Thank you, pma
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