I am not against the higher voltages.
Its perfectly safe, if you build it well.
Its more efficient.
My post referenced the fact that commercial realities make such things unlikely, imho, for std boats/kits in the near term, in conductive seawater conditions.
Selling such things has high costs/risks/liabilities, and unless customers insist (unlikely near term), its easier to sell low voltage systems.
Certification costs are higher than market value, atm, in the EU, I think.
Its potentially very easy, and cheap, to fully isolate high voltage cable runs.
High pressure PVC (10 bars), for example (might not actually be PVC, another plastic (fumes in shorted cables etc)).
Solvent welded cable runs, pressure and gas tight tight.
10€/ 3 m or so, for 40 mm D.
A few comments on some recent posts.
I'm quite amazed that people are limiting their systems to 74V. I'm not crazy or suicidal operating a 144V system and have several safety features in place such as a pack splitter to 2 packs at 72V (for working on the batteries) and main disconnects to the systems. Yes it's deadly but well protected from 12 year olds getting their fingers on the system. My point is would any of you let someone get near any pack of batteries? Accidents happen, we will minimize the chances of that occurring but on a system of this size 144V is the way to go. MANY boats are out there operating at this and higher voltages with highbred systems.
-- -hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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