CNET On Cars – Car Tech 101: The move to higher-voltage electrical systems
Brian Cooley explains how new 48-volt electrical systems are coming to cars to power better tech.


CNET On Cars - Car Tech 101: The move to higher-voltage electrical systems

20 thoughts on “CNET On Cars – Car Tech 101: The move to higher-voltage electrical systems

  • April 21, 2015 at 3:39 pm

    While I have no problems with 48V DC batteries, I've been hearing this for IDK a decade. So what's the hold up?

  • April 21, 2015 at 5:02 pm

    Meh, electric things are bound to break, I would rather choose older car with simple and more reliable mechanical components.

  • April 21, 2015 at 8:28 pm

    I would love a 48v car just for the improvement in the audio system. It would be nice to have a decent internal amp in head units instead of just 10-12w rms x 4. Much more power with less electronics.

  • April 21, 2015 at 8:43 pm

    This story was groundbreaking a decade ago. BMW claimed to be making the switch in a couple of years, several years ago and then never mentioned it again. Service vehicles like police, fire and ambulance already use a dual battery, dual alternator set up because of the immense load the peripherals put on a standard system. Tractor trailers (18 wheelers), large RV's and buses use a bank of 12V batteries coupled with an HD alternator. It's time for this idea to finally arrive. Thanks for the info on the electric powered alternator, water pump, A/C compressor, etc. That is some boss stuff! These items sap up to 15% of an engine's available horsepower. As always, Brian…excellent reporting!

  • April 21, 2015 at 8:56 pm

    fack electronicks good old fasion parts never break and are easy to replace now got a broken care sure trubleshoot for about 3h to relize one 100ohm resistor broke good old days part doesnt work get the new one wack  it in done

  • April 22, 2015 at 3:32 am

    If it's not connected to the exhaust, wouldn't it be an electric *super*charger?

  • April 22, 2015 at 6:00 am

    using 48V DC battery can save more gas ?? so i;m gonna add another 3 12V DC battery …..haha

  • April 22, 2015 at 12:38 pm

    WTF electric turbocharger that would be the shits that every designed

  • November 2, 2015 at 8:37 pm

    Believe it or not there is topically less wiring on a car today than 10 years ago.

  • December 22, 2017 at 6:13 pm

    Cars are much better now then say 40 years ago. With electric cars on the horizon they will better cheaper to run and simpler.

  • December 31, 2017 at 3:56 pm

    Aircraft have been using 24vdc since the 50s most modern passenger aircraft use 120vac

  • March 20, 2018 at 11:09 pm

    Wouldn't a 48 volt alternator require more work from the engine to turn? I feel like that would negate any benefit. The whole system would be less efficient anyways because you would be converting mechanical energy to electrical energy at the alternator and then back to mechanical energy at the component. Since efficiency is lost during every conversion and there are no conversions in today's cars, how would this be of any real benefit?

  • May 30, 2018 at 2:23 pm

    making more stuff in the engine compartment to go wrong or take longer to work on which costs more $$!

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