Thursday, May 4, 2017

Re: [Electric Boats] My E-Ray - Converting a planing hull cruiser to electric propulsion

 

This sounds like our project.  Repower twin gas with 27HP electrics.  Similar cruising range at hull speed desired with reduced "short spurt" planing.  We are specifyng between 1100 and 1600 Ah of AGM batteries.  for a range of 20-30 Nm at ~6-7 Knots.  

  • Bayliner 3350
  • 7.3kW honda
  • 32' LWL, 11,000 displacement, 11.5 ' beam, 3' draft
  • 1.5" shafts, swinging 17x20 3 blade props


 Dale Hotten
 619.708.3258



On Thu, May 4, 2017 at 11:40 AM, cliff_sadler@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
 

I accidently hijacked Scott Masterson's thread about his 3 conversions, so I am moving my project to a new conversation.

You can read within his thread to get some of the bantering we have been doing about this repower.  I will move some of the relevant posts over to here.


In a nutshell:

1998 Sea Ray 370 Sundancer

twin 454 EFI 380 HP each Gas ICE w/ 2 140 gal gas tanks

7.0 BCG Westerbeke generator

35-36' LWL, 18,000 displacement, 12.5 ' beam, 3' draft

1.5" shafts, swinging 18x22 3 blade props


Desired outcome:

Retain 7.0 BCG Westerbeke, or replace with diesel equivalent for house amenities and charging

Replace ICE with twin electric to obtain at least 5 knots for up to 2 hours

Prefer air cooled, but open to other technologies (oil cooled, etc)

Start with fairly conventional batteries, and wait for technology to improve and costs to come down

Overall project cost is a factor - Vendor/Manufacturer partnership?


Usage model:

Close quarters maneuvering around marinas and anchorages, with typical light winds and none to light currents. Protected bay and extensive ICW areas to play in on the sun coast of Florida.

5-7 mile max run in any particular direction before anchoring, or docking for extended periods (4-6 hours)

Show off the potential of re-purposing perfectly good cruisers who's power plants are expired, with E power


OK, fire away......



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Posted by: Dale Hotten <dalehotten@gmail.com>
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