On aircraft, 28 volts (24 volts) has been the standard low voltage
forever. It is the standard on specialized military vehicles and
equipment as well. (Yes, you can find 12 volt systems, but only in tiny
airplanes and small OEM type military vehicles.)
"42 volts" is the threshold for "low voltage" in the US National
Electrical Code, but as I recall, that is for AC rather than DC. There
are quite a few cordless lawn mowers and other beefy cordless tools that
hover right around 48 volts.
I suppose if you are going to make a departure from the industry
standard of 12 volts, then why not go all the way to 48 volts. Same "low
voltage" classification, but one quarter the amps and thus one quarter
the wire size.
Bill D.
On 10/6/2024 11:17 AM, EV List Lackey via EV wrote:
On 5 Oct 2024 at 17:36, Danny Ames via EV wrote:
revolutionary 48 volt replacing ancient 12 volt tech
I'm not so sure that it's that novel. We were discussing proposed 42 volt
automotive electircal systems on this list about 30 years ago. Maybe
someone else will remember why it didn't catch on back then.
The advantages of higher voltage have been clear for a long time. That's
why the automakers raised system voltage from 6 to 12 volts in the 1950s.
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