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Unread 01-14-2020, 02:11 PM   #1
Not Yet Wild
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Join Date: Jan 2019
Location: Knoxville TN
Posts: 13
Default 72V AC Drive Precedent Progress

I think everything is ready now. (Just waiting on the battery arrive) They sent me a picture of it before it was loaded on the boat, and it should be here in three or four weeks now....

Motor, controller and all wiring is complete. Battery mounting bracket built and in place. New body, lights, and disc brakes are installed. It ran really well with the old 48V lead-acid batteries, so I can't wait to try it with the new set-up.
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Unread 01-16-2020, 08:45 AM   #2
Getting Wild
 
Join Date: Oct 2019
Posts: 142
Default Re: 72V AC Drive Precedent Progress

Quote:
Originally Posted by dougrobling View Post
I think everything is ready now. (Just waiting on the battery arrive) They sent me a picture of it before it was loaded on the boat, and it should be here in three or four weeks now....

Motor, controller and all wiring is complete. Battery mounting bracket built and in place. New body, lights, and disc brakes are installed. It ran really well with the old 48V lead-acid batteries, so I can't wait to try it with the new set-up.
What battery is that you are using, and do you have a link to specs / cost etc?

72v is the way to go I think with the Navitas AC setup - should (as I understand it) produce the most efficiency in terms of miles / wh used, esp. at higher speeds.
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Unread 01-16-2020, 08:53 PM   #3
Not Yet Wild
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Join Date: Jan 2019
Location: Knoxville TN
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Default Re: 72V AC Drive Precedent Progress

Here is the spec on the battery. It is 72V, 120aH, and includes a voltage reducer for my 12V needs. The price was about $1,800 plus about $400 to ship it here.
I think I ďover-specedĒ it with the 200A battery management system, as I donít believe current draws will be nearly that high on a consistent basis (especially at 72V). I will data log the current draws when itís in and installed. You would probably be fine saving some money by reducing the BMS or maybe even the aH, but I just didnít want to spend a bunch of money and come up short, so I tried to error on the high side...
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Unread 01-16-2020, 11:06 PM   #4
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Join Date: Oct 2019
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Default Re: 72V AC Drive Precedent Progress

Quote:
Originally Posted by dougrobling View Post
Here is the spec on the battery. It is 72V, 120aH, and includes a voltage reducer for my 12V needs. The price was about $1,800 plus about $400 to ship it here.
I think I ďover-specedĒ it with the 200A battery management system, as I donít believe current draws will be nearly that high on a consistent basis (especially at 72V). I will data log the current draws when itís in and installed. You would probably be fine saving some money by reducing the BMS or maybe even the aH, but I just didnít want to spend a bunch of money and come up short, so I tried to error on the high side...
That sounds like a good price for that AH and voltage. Will be interested to see the product when you get it and learn about performance etc...

Please keep us posted.
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