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Wrench spinner
Joined: Thu Oct 5th, 2017
Location: Leigh On Sea
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Originally, when cars were crank started you only needed power to drive the ignition so 6v was enough.
Yes, higher voltages means lighter wires can be used but then you have to carry more batteries - look at the electric and hybrid cars these days, huge battery trays and up to 120v.
12v is all you need until you get into the big diesels, most of which run 24v and have two massive 12v batteries.
You could up your truck to 24v and fit commercial 24v lorry parts, if you can find them to fit... but even lorries run some systems at 12v, like radios etc. Most electronics run at 12v and 5v.
Or if you are not worried about efficiency, then get an inverter and run some systems at 110v ac!
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MG power