Wednesday, May 11, 2022

Re: [electricboats] Replacing FLA Batteries with Lithium in Duffy Electric Boat

Hi,


I think the ability has more to do with maximium Amperage the controler can take, but tell me if I am wrong! 
I have a Duffy 18, on 36V Lifepo4 and the original Curtis controller which is only suited for 36V.

Roland

Van: electricboats@groups.io <electricboats@groups.io> namens Rob Houston, W0WKO <rahouston@gmail.com>
Verzonden: dinsdag 10 mei 2022 12:55
Aan: electricboats@groups.io <electricboats@groups.io>
Onderwerp: [electricboats] Replacing FLA Batteries with Lithium in Duffy Electric Boat
 
Hello, All,

I have an older 16-foot M160 Duffy Electric Boat, which is a somewhat rare model with a hull similar to a tri-cat.  The lead acid batteries in the boat (8 220 Ah 6V GC2's) are nearing end of life, and I'm considering upgrading to a 48V 150Ah lithium ion battery, specifically NMC chemistry (13S @ 4.2V=54.6V max).  

The boat has a 5hp motor connected to a Zapi SEM-1 controller.  Should I be at all concerned that the NMC battery will provide 54.6V to controller? Are controllers generally able to handle this level of over-voltage?

Thanks in advance for any helpful comments or perspectives you can provide!

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