Re: [electricboats] Pearson P27 Diesel Pulled

I have an Electric Yacht QT2.5 (no longer offered publicly, but likely still available if you contact EY) installed on a 3200 lb. catboat for the past three years, and have had no issues with the unit. It is a direct drive (no gear reduction). It is a 24V system. I got good service during the purchase stage (customized boat power/range charts). The only hiccup was that they delivered a throttle assembly (nice, stainless steel body) which did not have a post/lever. This made actuation while wet difficult. They replaced the part gratis with one which included a stem after a season of use.

On Mon, Aug 21, 2023 at 2:20 PM Richard deVarga <rdevarga@gmail.com> wrote:

I recently pulled out a frozen Volvo Penta from a Santana 30/30 GP, so I am also doing research for an 10kw electric propulsion system to get me in and out of a small inland cove marina. I have spent time looking into the Thunderstruck EV 10kw kit and the other systems listed via Plugboats.com. As you will see, the motors and batteries costs very widely. My goal is to try to select a simple system that I can install and maintain by myself. And try to find a system that was manufactured in the USA with a multiyear warranty. I would like to be in the $7000 to 8000 range for the motor kit + lithium batteries. In addition to Thunderstruck, the company I have been investigating is Electric Yachts. I like their QuiteTorque 10kw propulsion system. I am not settled on batteries since the costs and warranties very widely, but very interested on others choices. Please keep us informed of your progress with the system. 

--

Christopher Greenwald

14 Manitoba Rd.

Waban, MA 02468

Cell 617-699-9189

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Re: [electricboats] Pearson P27 Diesel Pulled

I recently pulled out a frozen Volvo Penta from a Santana 30/30 GP, so I am also doing research for an 10kw electric propulsion system to get me in and out of a small inland cove marina. I have spent time looking into the Thunderstruck EV 10kw kit and the other systems listed via Plugboats.com. As you will see, the motors and batteries costs very widely. My goal is to try to select a simple system that I can install and maintain by myself. And try to find a system that was manufactured in the USA with a multiyear warranty. I would like to be in the $7000 to 8000 range for the motor kit + lithium batteries. In addition to Thunderstruck, the company I have been investigating is Electric Yachts. I like their QuiteTorque 10kw propulsion system. I am not settled on batteries since the costs and warranties very widely, but very interested on others choices. Please keep us informed of your progress with the system. 

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Re: [electricboats] Pearson P27 Diesel Pulled

We installed an Elco system in a Tartan 34C a few years back. It was a great system and Elco customer service was excellent. 

On Aug 20, 2023, at 6:50 PM, duncan@troycable.net wrote:

Hello, 

New to this group. I just purchased a Pearson P27 1989 model last spring.  The engine is shot.  I pulled it out and had a mechanic take it apart.  He said it is a goner. Since I only have a prop shaft in the sailboat now.  I am thinking of taking this opportunity to do an electric conversion.  Where is the best place to get an 8kw motor with controller?  Also, I need a mount and prop shaft coupling fabricated to make the motor fit the old diesel mounts and prop shaft.  

Thanks!

Re: [electricboats] Pearson P27 Diesel Pulled

I purchased my motors, controllers and motor mounts from www.thunderstruck-EV.com. They are great to deal with and sell complete kits. You’ll need to calculate the reduction you’ll need to match prop rpm from diesel to electric. 

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Re: [electricboats] Pearson P27 Diesel Pulled

I also went electric for my 10M with parts from Thunderstruck.  I fabricated my own motor mounting and reduction drive.  See all sorts of details here:
http://dan.pfeiffer.net/10m/electric_drive.htm

It is equal to or better in performance to my diesel in every way except range.  Not a concern for my current day-sailing use. 

I would consider the Thunderstruck 10kW kit to re-power a P27.   They do not have a kit between 5 and 10.  I think the 5kW kit is marginal power for you and the 10kW will have more than enough reserve power for basically no penalty in efficiency.  The 10KW putting out 2kW to cruise won't use any more than the 5kW putting out 2kW to cruise and will run cooler and well within it's capacity.  Trying to punch through a choppy entrance will have the 5kW at max and the 10 happily running at 50% with no concerns about excess heat. 

The battery is going to be the most expensive part of the conversion.  I went with a lithium (LiFePo4) that I assembled from prismatic cells for several reasons all described on the page above.  Chief among them cost per AH of usable capacity of about 1/4 that of drop-in cells.

Dan Pfeiffer

On 2023-08-20 8:20 pm, Circe Strauss wrote:

Check out thunderstruct_ev.com. I got my motor and controller from them and I'm pretty happy with it.

On Sun, Aug 20, 2023, 7:50 PM <duncan@troycable.net> wrote:

Hello, 

New to this group. I just purchased a Pearson P27 1989 model last spring.  The engine is shot.  I pulled it out and had a mechanic take it apart.  He said it is a goner. Since I only have a prop shaft in the sailboat now.  I am thinking of taking this opportunity to do an electric conversion.  Where is the best place to get an 8kw motor with controller?  Also, I need a mount and prop shaft coupling fabricated to make the motor fit the old diesel mounts and prop shaft.  

Thanks!

Re: [electricboats] Pearson P27 Diesel Pulled

Check out thunderstruct_ev.com. I got my motor and controller from them and I'm pretty happy with it.

On Sun, Aug 20, 2023, 7:50 PM <duncan@troycable.net> wrote:

Hello, 

New to this group. I just purchased a Pearson P27 1989 model last spring.  The engine is shot.  I pulled it out and had a mechanic take it apart.  He said it is a goner. Since I only have a prop shaft in the sailboat now.  I am thinking of taking this opportunity to do an electric conversion.  Where is the best place to get an 8kw motor with controller?  Also, I need a mount and prop shaft coupling fabricated to make the motor fit the old diesel mounts and prop shaft.  

Thanks!

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[electricboats] Pearson P27 Diesel Pulled

Hello, 

New to this group. I just purchased a Pearson P27 1989 model last spring.  The engine is shot.  I pulled it out and had a mechanic take it apart.  He said it is a goner. Since I only have a prop shaft in the sailboat now.  I am thinking of taking this opportunity to do an electric conversion.  Where is the best place to get an 8kw motor with controller?  Also, I need a mount and prop shaft coupling fabricated to make the motor fit the old diesel mounts and prop shaft.  

Thanks!

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