I guess if it were me and cost wasn't as important as space/weight savings,
I'd jump on one of the many bulk orders of LiFeP batteries from China going
on these days.
Typical price per cell: $1.10/ah
So, assuming you need 36v and 200ah, you'd want 11-cells at say 240ah
capacity. That'd cost you 240*1.1*11, or $2864 plus BMS (e.g. here:
http://www.tppacks.
installation.
-MylesT
----- Original Message -----
From: Monte Gisborne
To: electricboats@
Sent: Sunday, July 26, 2009 2:32 PM
Subject: [Electric Boats] Boston Whaler Project
I am always impressed by the broad range of experience and expertise that
this discussion group seems to attract and retain, so I decided I would put
a question out and invite all to ponder and respond.
I am working on a project involving the eco-enhancement of a fleet of 19'
Boston Whalers to allow the operator to opt to propel the boat using an
electric drive when there is no need to be up on plane. I have chosen the
36-volt Lenco Dual Digital propulsion system since it would work seamlessly
with the existing 150+ HP gasoline-powered outboards and complement them
rather than compete with them, as well as add the trim tab functionality.
When off plane, it would be a simple matter of turning off and tilting the
gas motor up, lower the Lencos and switch operation from helm steering to
the JoyRide T joystick. Quite simple and effective as I see it since
neither system will interfere with the other.
The question I pose is that we probably need to look beyond lead-acid since
we are trying to limit the overall weight increase of this parallel-hybrid
system. A 200 amp-hour, 36-volt nominal battery pack would be considered a
minimum. We are also concerned about battery longevity as they will get
tossed around quite a bit in the open waters on full plane and subject to
vibration and other environmental hazards. Cost is certainly a factor, but
not the dominating one.
Any thoughts on this out there in e-boatland?
Monte Gisborne, B.Tech.
Tamarack Lake Electric Boat Company
207 Bayshore Drive, R.R.#3,
Brechin, Ontario Canada L0K 1B0
(705) 484-1559
(416) 432-7067 (cell phone)
monte@tamarackelect
www.tamarackelectri
Tamarack Lake... Where Water and Electricity Mix!
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