Replacing Gas engine with electric motor

mazinalizzi

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Hi
I have

1998 Regal 2760 Commodore​

i would like to replace mercruiser 4.3 to electric motor
any suggestions which motor and what is the HP and the Watts?
Thank you?
 

Chris1956

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You have twin V6 engines, right?

There are some manufactured boats, although I do not remember one with as much power as you would need. I would recommend you see what they use for power and batteries.

There was an electric ski boat. It ran for 2 hours and then needed an overnight charge.
 

Scott Danforth

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The new all electric boats have a range of about 30 to 40 miles an need a recharge
 

mazinalizzi

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Thank you for the info
I want to start this project, electrical motor and solar power charging
 

Scott Danforth

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Thank you for the info
I want to start this project, electrical motor and solar power charging
solar power charging doesnt work for electric propulsion if its mounted to the boat.

do the math first. determine how many batteries you will need (about 2200# of them) and determine how big the solar panels need to be to charge them
 

tpenfield

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Twin engines (right), so 2 x 150 kw

Just wondering how big of a battery bank that would be? If you'd want a run time of at least 1 hour at half power?

So, 150 kw-h
 

Scott Danforth

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battery costs are about $100/kw-h to make electric cars.

 

tpenfield

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However, you're in luck. . . . Chineses company NIO has just announced a 150 kwh battery pack for vehicles. I think the pack alone weighs over 1,000 lbs. . . . probably costs about $15,000+
 

racerone

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Many folks are going to find out that electric power for cars and boats is available.----But it is not cheap.-----May not save you any $$$$ in the long run.
 

dwco5051

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It takes a lot less power to keep a car at cruising speed on level ground than it takes for a boat. A planing boat at cruising speed is like driving up Pike's Peak.
Electric azimuthing propulsion pods for displacement hulls will come first I think for displacement hulls until a big break through in batteries comes. JMHO

 

Scott Danforth

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Electric boats are not for everyone

the new (way more than I can afford) all electric Torqeedo boat.......has a range of 30 miles before you need to re-charge.

my average boating trip is 65-80 miles because its 26 miles just to the ICW for me. that means I need to have 2 12 hours charging stops to boat?

even some of the upper-crust boats that can do 100 nautical miles are in the $330k range https://www.xshore.com/

since the average person puts less than 50 hours a year on a boat (typically under 20) if you assume 10 gallons per hour (way more than the typical usage) that is 200 gallons per year or at todays prices, just over $660 a year.

with a new 26 foot bow rider in the $80k range

the payback would be in 417 years (excluding the fact that the battery packs need to be replaced every 10 years or so)

until we get a mr fusion that runs on banana peels and stale miller lite.... electric vehicles are not viable. they are not green and they are not cost effective.
 

racerone

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All the hype proves to me that folks must be very good at their daytime jobs.-----Because they know very little about volts , kilowatts and amperes.-----Know very little about how much power is required to charge one of these monster batteries.----How much power is required to move a boat at speeds above trolling.-----This " green movement " will not be cheap.------The numbers are not out there yet.------What do folks expect about depreciation on an $80,000 EV once it is 6 or 8 years old ?-----Will it be worth $15,000--?????----Any buyer might know that it is soon due for a $20,000 new battery
 

Scott Danforth

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All the hype proves to me that folks must be very good at their daytime jobs.-----Because they know very little about volts , kilowatts and amperes.-----Know very little about how much power is required to charge one of these monster batteries.----How much power is required to move a boat at speeds above trolling.-----This " green movement " will not be cheap.------The numbers are not out there yet.------What do folks expect about depreciation on an $80,000 EV once it is 6 or 8 years old ?-----Will it be worth $15,000--?????----Any buyer might know that it is soon due for a $20,000 new battery
and the price is only $80k since us tax payers have been paying the subsidies

 

racerone

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Price of gasoline in many places includes taxes for road / bridge maintenance.-----So are these EV vehicles or even horse drawn carriages paying road taxes ?
 

racerone

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Every day will require about $10 to be put into a battery replacement fund.
 

dingbat

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The end game of EV isn't to save money. It's to cut carbon emissions.

Money in the first Infrastructure bill included money for a pilot program for a national vehicle miles traveled fee.
 

tpenfield

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I would like an electric outboard for the dinghy/tender. I currently run a Mercury 7.5 HP and it would probably be a good fit for a small electric outboard.

I also wish there was some decent electric engine conversions for some of my outdoor power equipment (OPE), but I have yet to see them.

As for twin engines in a boat, be they 200 HP or more, I think that will take some time for power storage technology to catch-up.
 
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