IMO I'm pretty ok if its an OEM boat/battery. There are certain NMC manufacturers that don't (at least that I can find) have a single battery fire to their name. DIY its tempting but I do not think its worth it. I have a variety of NMC batteries in my shop with a great form factor and energy density. You could put 20kw in say a 30' boat without much effort at all. Including the motor you would probably still weigh less than a full tank of fuel and a diesel.
In a few months CATL will be shipping lifepo that rivals NMC energy density. Exciting times.
Matt Foley
Sunlight Conversions
Perpetual Energy, LLC
201-914-0466
On Tuesday, September 13, 2022 at 09:55:37 PM EDT, bobkart <couch45@msn.com> wrote:
What are people's thoughts on the use of NMC versus LFP on a boat, for propulsive power?
NMC has considerably better energy density (by mass), but of course is less safe from a thermal-runaway standpoint.
The supplier I'm considering says the 'flash point' of his cells is 400C ("close to LFP" he says), but I see more like 300C for NMC and 500C for LFP (round numbers).
I'm attracted to the better energy density of NMC, but don't want to endanger our lives by moving to it.
NMC has considerably better energy density (by mass), but of course is less safe from a thermal-runaway standpoint.
The supplier I'm considering says the 'flash point' of his cells is 400C ("close to LFP" he says), but I see more like 300C for NMC and 500C for LFP (round numbers).
I'm attracted to the better energy density of NMC, but don't want to endanger our lives by moving to it.
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