All kinds of ideas. Flex plate or flywheel diameter power generation - integral with the engine power steering and A/C compressors, molded batteries within the firewall. Higher voltage means tinier wires. A 48 volt gear reduction starter for a 6.0 liter engine can be eight AWG. NASA has been employing a battery roughly the size of a group 31 that has in excess of 700 amperes at the 20HR rate. Double the number of devices and the probabilty of problems increases to the square. At age 20 I believe I had perhaps 1/20th the number of things go bad in any given period. Like it or not stuff that fails costs time and time is irreplaceable and priceless. The Great Awakening may not be far off. Mega advertising of simpler more reliable merchandice - of course at a premium price :)
