electric c-dory and speed with kickers

[croakz]

OK you buy the 48 volt 100 amp hour battery. How are you going to recharge it when cruising? I have not owned an e-Propulsion Spirit 1.0 and don't know if it can be recharged from 12 volts, but the Torqeedo can be, and it was often recharged when running the outboard as we recharged the 200 amp hours of Battle Born house battery.

I have a Victron 12/12 18A DC to DC smart charger going to a bank of 2 x 100AH lifepo4s now. I use those to charge an Ecoflow Delta Mini via a 12v to 24v step up.

If I added 48V battery, I'd probably just get a 48V AC charger and plug it into my Ecoflow to charge on the water. And then I could also that AC charger when shore power is available. Charger loss efficiencies aside, it'd be a simple solution.

I also have a 12V charger for my ePropulsion, but I wanted the ability to use it longer than the 25Ah battery that comes with it. Thus the larger 48V battery. I don't think you can run a Torqueedo or ePropulsion off straight 12V.

 

[Roamad]

I recently explored this quite a bit while working on repowering my 16 CD. The most promising option seemed to be a company in Seattle called Pure Watercraft. They make a very sleek 50hp-equivalent electric outboard and their people were very helpful in walking me through the potential. (They recently signed a partnership deal with General Motors — imagine that!)

Anyway, much of their testing was done with boats similar to mine in length and weight. They estimated I could see 7 hours of run time at 4-6 mph, with enough top end to reach planing speed (resulting in significantly less run time, of course). The weight of the motor/battery package is very similar to a 50hp gas outboard & fuel tank.

The total package would have cost near $20k, however. So I ended up going with a used 4-stroke EFI motor, which set me back about $5,500 installed.

I know the OP asked about using a kicker-size electric outboard. But I thought this was useful info for comparison anyway. Here’s a link to the Pure Watercraft motor:

https://www.purewatercraft.com/product/pure-outboard/

 

[ssobol]

… or any possibilities of fire. ...

Plenty of examples of electric cars on fire. Just search YouTube.

Chevy says not to park your new Bolt in your garage because of the fire risk.

 

[LesR]

Here's the boat we saw in Auke Bay last July, which appears to be a practical (albeit slow) electric cruiser. They made the trip from Bellingham to Ketchikan in 20 days, roughly double the time it took us. Alex told me they could run continuously during the day at 5 knots using power from their solar panels. Faster than that or in low light conditions ate into their available battery power.




Link to Devlin's site that includes more detail.
https://devlinboat.com/solar-sal-27-the-latest-launch-from-our-shop/

 

[thataway]

I have a Victron 12/12 18A DC to DC smart charger going to a bank of 2 x 100AH lifepo4s now. I use those to charge an Ecoflow Delta Mini via a 12v to 24v step up.

If I added 48V battery, I'd probably just get a 48V AC charger and plug it into my Ecoflow to charge on the water. And then I could also that AC charger when shore power is available. Charger loss efficiencies aside, it'd be a simple solution.

I use a Sterling 30 AM B to B charger, and that is just enough usually to keep up with two 100 amp hour batteries use for chest freezer/refrigerator. You will have to run a very long time with the Victron (I have the Orion in my second portable setup I use for the SUV refer, so I know what its characteristics are.) You are not going to be keeping up unless there is minimal use of the 48 volt power supply. There is going to be a moderate amount of loss with use of chargers, inverters, etc. You will rapidly deplete the "EcoFlow DELTA Mini's" battery with the 48 volt charger--almost like perpetual motion...the numbers just don't add up.

I also have a 12V charger for my ePropulsion, but I wanted the ability to use it longer than the 25Ah battery that comes with it. Thus the larger 48V battery. I don't think you can run a Torqueedo or ePropulsion off straight 12V.

The Torqeedo charges on 12 volts--and can be charged by either another power source, including solar when running. That may not be "running" off 12 volts, but 12 volt power source is providing the charging to keep the battery topped off. Torqeedo battery nominal voltage is 29.6 volts. Early on Torqeedo Australia did an open ocean run with the Torqeedo (I believe the 1103) of 30 miles. They had solar panels on a Bimini type of structure. During the height of the day, the net draw was zero from the battery and as I recollect they were doing about 2.5 knots...

From the Torqeedo manual:

According to section 6.4.2 on page 79 of the Travel outboard User Manual,
"Charge using a DC power supply in the range of 9.5 V to 50 V.
The DC power supply must be able to provide at least 4 A.
Use the Torqeedo 12/24 V charging cable (item number 1128-00) for charging."

"The battery can be charged during use (charge and discharge at the same time). The power display shows only the power being drawn from the battery in this case. If the charging current is greater than the current drawn by the motor, the power display shows 0 W and the battery is being charged. The charge status display takes into account the charging current as well as the current drawn by the motor."

.

 

[croakz]

You are not going to be keeping up unless there is minimal use of the 48 volt power supply. There is going to be a moderate amount of loss with use of chargers, inverters, etc. You will rapidly deplete the "EcoFlow DELTA Mini's" battery with the 48 volt charger--almost like perpetual motion...the numbers just don't add up.

Hi Bob,
My goal is not to keep up, it’s to last longer than the battery that comes with it. I could get a spare ePropulsion battery, but an external lifepo4 seemed more versatile. I guess I could do 12v @ 400ah vs 48v @ 100ah, but 48v is native to the ePropulsion. It’s not dissimilar to you using a torqeedo and charging over 12v, it’d not going to keep up either. At least not at 1000 watts. But it prolongs it.

- tom

 

[thataway]

Yandina makes the "Trollbridge" battery charger for 24 and 36 volts. She might give you advice, find a way to modify one of the stock units or make a 48 volt one for you. I suspect that there are a number of other 48 volt applications where this would be utilized, if one wanted to charge a group of batteries in parallel, and use in series.

I am not certain what year Honda 90 you have, but those prior to 2006/07 were only 17 amps 12 volt output. A certain amount is necessary for the engine and boat's electronics...not a lot left over for battery charging..

 

[South of Heaven]

Good luck OP. I would say the CD hull would not be ideal for that. It's a planing hull.

I guess maybe on a quiet, inland canal it could work with winds of less than 5 knots.

 

[hardee]

Bob, understood re wanting a longer narrower hull. Are there any specific hulls out there you think would make a good base for this kind of project? Something like a modern Monterey Clipper? (Is anyone building those?)

Check out the "Allweather26" for a canoe hull.

Allweatherboats.com

Harvey
SleepyC :moon

 

[hardee]

Bob, understood re wanting a longer narrower hull. Are there any specific hulls out there you think would make a good base for this kind of project? Something like a modern Monterey Clipper? (Is anyone building those?)

Check out the "Allweather26" for a canoe hull.

Allweatherboats.com

Harvey
SleepyC :moon

 

[Moxieabs]

Look at the electric outboards of various sizes by "Flux"