Electric Conversion log for Kahleesea - SailNet Community
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post #1 of 210 Old 10-26-2018 Thread Starter
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Electric Conversion log for Kahleesea

Thus begins my hopefully not-too-eventful conversion of my 1994 Hunter 29.5 to electric.

My assumptions:

~10kW motor @48V
~2 hours cruise speed @ ~5kts
Biggest, slowest 2-blade prop with the biggest pitch I can find - target RPM ~600 at cruise for maximum efficiency
Hull speed under motor power alone for short sprints (current Yanmar cannot accomplish this feat, tops out at about 6.5kts WOT. hull speed is 7.2)
Regeneration while under sail
Project completion ~ April 2019.

I'm open to suggestions as to motors, batteries, etc. I'm leaning towards a motenergy 1114 with a 5:1 gear reducer and used Volt batteries, since they're 9.5x9.5x10.5 and it will be easier to fit them in my available space than other lithium batteries.

Step 1 is this weekend - take video of the Yanmar 2gm20 starting up and running to show it's in good working order, and then post it for sale. Hopefully it will sell quickly. I'd like to remove it from the boat and drop it into the buyer's truck, as I don't really have space to store it anywhere.
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post #2 of 210 Old 10-26-2018
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Re: Electric Conversion log for Kahleesea

I'm following this! I hope you post pictures as you go.

Catalina 22
on a starboard tack
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Re: Electric Conversion log for Kahleesea

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I'm following this! I hope you post pictures as you go.
Absolutely. I don't mind sharing both my triumphs and my mistakes.

I'm not 100% sure how I'm going to proceed yet mainly because I don't have good visibility on the prop shaft coupler and the bottom of the engine compartment. Until the motor is out I won't know how precisely I'm going to be able to place the electric motor, only that it's not going to take up nearly as much space.
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Re: Electric Conversion log for Kahleesea

You should check out Learning the Lines on Youtube. This couple is doing a full re-fit on their Endeavor 32 (that they got for free), including replacing the diesel with an electric motor.

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Re: Electric Conversion log for Kahleesea

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You should check out Learning the Lines on Youtube. This couple is doing a full re-fit on their Endeavor 32 (that they got for free), including replacing the diesel with an electric motor.

53. ELECTRIC SAILBOAT Conversion Progress - Removing the Diesel Tank and Painting - DIY Sailing - YouTube
Sweet! I'll definitely check it out!
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post #6 of 210 Old 10-29-2018 Thread Starter
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Re: Electric Conversion log for Kahleesea

The Yanmar is up for sale, step 1 complete.

Step two will be pulling the old motor out. While I *might* be able to pull this feat off solo, there's a non-zero chance of me dropping the motor into the drink and/or damaging the dock, so I'm leaving it to professionals. I'll have pictures for that process.

I have a video of the motor cold starting in 55 degree weather. It takes about 30 seconds to catch and smooth out, then runs normally. In the summer it normally starts from cold in half that or less.
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post #7 of 210 Old 10-29-2018
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Re: Electric Conversion log for Kahleesea

..55 degrees is cold weather?.

Northern Alberta. "85" C/L 16. ,"85"S2 7.9 under repair.
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Re: Electric Conversion log for Kahleesea

Oh,good luck n your conversion,check out mbiankas posts for how his is working..is interesting to follow different ideas..Ralph

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Re: Electric Conversion log for Kahleesea

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..55 degrees is cold weather?.
Not for me, I'm Canadian.

Kahleesea's current motor doesn't like it below 60. One of the many reasons I'm ditching it for electric.
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Re: Electric Conversion log for Kahleesea

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Oh,good luck n your conversion,check out mbiankas posts for how his is working..is interesting to follow different ideas..Ralph
Thanks! I've been planning this for years now. I'll keep adding to this thread as things progress.
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