I have big diesels that require some serious power to crank them, much like the rest of you.
Batteries are around $450USD each conservatively and last around 4 years. They get a real hammering. (that means $900 for a 24v bank).
If I was to add 2 of these (one for each engine)
https://www.skeletontech.com/ultrac...Start-Engine-Module-24V/p/67663983/category=0
I'm 24v starting so I'd be investing $3200 plus shipping in USD. On the surface it doesnt seem worth it.
Where it does seem worth it however, is in dead battery situations. The technology allows me to rapidly (less than 10 minutes) charge these things up using any source (including my dead batteries as long as they have more than 9v) - to a point where I can get my main engines started - and I could even use a small booster battery to do this.
In automotive settings this could be a massive plus where kids and adults alike are draining their car batteries below the voltage required to get the cc to start - but where they still have enough power to full power up a capacitor bank.
I think the benefits are clearly their, but like anything - its whether it solves enough of a problem / reduces cost enough to make it worth doing.
At the end of the day - for most of us - it comes down to the "cost benefit" -
Has anyone fitted these to their boats?