I have a 17' canoe that can do 5.2 mph using a 0.6 hp 12v electric motor with a 5" pitch prop (About 450 Watts or 35 amps)
To run that craft at that speed for 14 hours would require about 650 Amp Hours of available storage. or about 6 - 8 golf cart batteries.
I actually carry two golf cart batteries and 300 watts of solar panels, so I can run 5 hours no problem.
Most likely my motor controller would burn out about an hour into that run at that speed (wide open throttle) if I didn't stop for 5 minutes every hour to let the control board relays cool off.
If I am content to go 4 mph, then I only consume 300 watts/25 amps and can run as long as the sun is shining plus an additional 3 hours after dark...
I have a 24 foot pontoon boat that can run 5.1 mph using two 1.2 hp 24v electric motors with 4.5" pitch props that burns about 1,100 watts per motor (2200 watts total to maintain that speed) That would consume about 31,000 watt hours for a 14 hour run. That would require about 50 of those golf cart batteries (about 1.5 tons) to maintain that speed.
If I am content to scoot along at 3 mph, my consumption per motor drops to 300 watts (600 total). My 1800 watt solar array keeps up with that, no problem, and I can go all day when the sun is out and have cruising times of 10 hours. (30 mile range) for a delightful quiet day on the river.
In other words, if you adjust your expectation of travel speeds, you can get to where you are going (eventually) with exponentially less storage and power requirements..
Thanks
Ken Cooke
KY River
On Wed, Jan 30, 2019 at 2:11 AM ewdysar ewdysar@yahoo.com [electricboats] <electricboats@yahoogroups.com> wrote:
nice looking boat. you can go 14 hours at 5mph on a single charge? what batteries make up your battery pack? do you know how much energy your motor draws (in watts or amps) at your 5mph cruising speed?
Eric
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Posted by: Ken Cooke <ken.cooke@canewoods.com>
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