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powering macbook air from 12v supply?

3580 Views 11 Replies Latest reply: Dec 6, 2013 12:14 PM by PlotinusVeritas RSS
John Reed6 Calculating status...
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Sep 4, 2012 11:19 AM

A friend wants to power her MacBook Air on her boat from a 12V source (DC) What should she do, to get the most power-efficient solution?

MacBook Pro, Mac OS X (10.7.4), MacBook Air
  • SP Forsythe Level 5 Level 5 (5,200 points)
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    Sep 4, 2012 11:24 AM (in response to John Reed6)

    Use a 12V inverter, with the necessary wattage output. It would be a bad idea to at least get a 100 watt inverter, that converts 12V DC "cigarette lighter" plug to 110 V AC. You can get one at any consumer electronics store.

  • carl wolf Level 6 Level 6 (13,900 points)
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    Sep 5, 2012 4:55 AM (in response to John Reed6)

    Check the Apple store.  There are power adapters that plug into a cigarette lighter.  Although you're not interested in the cigarette lighter connector, a car battery provides 12VDC, and you can cut off the cigarette lighter connector, and connect it directly to a 12VDC power source.

  • RRFS Level 5 Level 5 (4,425 points)
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    Sep 5, 2012 7:08 PM (in response to John Reed6)

    Looking at the system information power panel my MBA shows 8.322 volts on the battery. 12 volts would adequately charge the battery because the charging regulator is inside the MBA not the Adapter. I'm not sure how the DC is switched between the 4 connections as it is reversible as to how it connects with the MBA at its power port.

  • DOlec Calculating status...
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    Nov 19, 2012 4:18 PM (in response to John Reed6)

    Please. Please Apple explain to me why in your closed universe you justify the reasoning to not be compatible with simple, standard 12v adapters? I invest in 12v solar - not 15v obscurity. Individual energy production is the next Internet and we need simple solutions to adapt to energy options. I understand being a closed system and building proprietary systems but independent energy production is a fast evolving animal and Apple needs to see and embrace this trend. Open up your adapters and embrace 12v solutions. Trust me.

     

    Embrace battery innovation and independent power generation and build user experiences to empower it. Your smart enough. 

  • RRFS Level 5 Level 5 (4,425 points)
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    Nov 19, 2012 5:27 PM (in response to DOlec)

    This Forum is NOT Apple. We are Apple product Users like yourself, we are not a part of Apple. We post to this Forum trying to help others gain knowledge or solve problems, that's all. Have a complaint for Apple? Post here:

    http://www.apple.com/feedback/

  • Dankichi Miller Calculating status...
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    Dec 1, 2012 5:29 PM (in response to John Reed6)

    Hey so John, all you need is a Dc-Dc converter. with 100 watts at 12 volts, you can step up to 16.5, with anything from 45- to a ways. It would need a magsafe 2 or magsafe 1 with an adapter, and would need a little soldering, but it's pretty easy. I could do it. My dad, (65) could do it. So all you need is the DC to step up, then you're good to go.

  • timelord51 Calculating status...
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    Dec 6, 2013 12:06 PM (in response to John Reed6)

    There is a 3rd party12 Volt adapter for the macbook--

     

    http://www.amazon.com/GPK-Car-Charger-Apple-Macbook/dp/B0056PXJ8O

     

    Jerry

  • PlotinusVeritas Level 6 Level 6 (13,585 points)
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    Dec 6, 2013 12:14 PM (in response to DOlec)

    Embrace battery innovation and independent power generation

     

     

    I know 2 people that charge their Air off a roll up solar cells with a cigarette female adapter (MOST solar cells come with them)

     

    using that an a 12V cig. adapter

     

     

    So, its very easy to do

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