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Re: Forever Power (almost)

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On 5/16/2017 11:28 AM, Jon Elson wrote:
> oldschool@tubes.com wrote:
>
>> This is just a stupid idea that I had, which will acomplish nothing,
>> other than see how long it lasts.
>>
>> I dont know how much a standard 12V 5 amp battery charger requires from
>> the 120Vac power line, but I read it was around 150 watts.
>>
> OK, if the 150 W is correct, that is an efficiency of 40%  (12 * 5 / 150)
> Not great.  Your inverter might have similar efficiency.  So, 150 W to run
> the charger, X 2.5 =375 W.  375 W draw from a 12 V system is 31 A,
> So, you are drawing 31 A from the battery, and putting back 5 A.  So, the
> total draw is 26 A.
>
>> How long would this actually work? I know there is going to be some loss
>> due to heat in the inverter and the charger too, so this really would
>> not last forever, but just how long would it last????
> Umm, I guess you might get a bit more than 1 hour before the inverter shut
> off on low voltage, assuming a regular car battery.  Most likely it would be
> more like 20 minutes with typical batteries.
>
> Jon
>
This is a lot more fun in person.  If you tell 'em that it runs longer if
you just disconnect the charger from the battery, you can watch their
mood go from disbelief to denial to anger back to denial in a few seconds.

I once got involved with a couple of free-energy guys.
One was starting a business based on using his car's electrical system
to generate Brown's gas to stuff back into the carburetor.

He was undeterred when he forgot to turn the generator off one night
and got a surprise the next day when he started the car. I don't think
he ever found his valve covers.  He was lucky.  But that's another story.

His entire sales pitch was based on one seriously flawed test drive.
He was immune to logic, so I offered to build him a gadget to give
him continuous readout of his gas mileage to make a verifiable test.
He was initially excited, but when I had a prototype a week later,
he had vanished into thin air.  Suppose he really didn't want to know.

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Forever Power (almost) oldschool@tubes.com - 2017-05-16 04:11 -0400
  Re: Forever Power (almost) mike <ham789@netzero.net> - 2017-05-16 02:24 -0700
    Re: Forever Power (almost) Aussie <aussie@none.com.au> - 2017-05-16 19:36 +0800
  Re: Forever Power (almost) Clifford Heath <clifford.heath@gmail.com> - 2017-05-16 17:56 +1000
  Re: Forever Power (almost) John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-16 07:06 -0700
    Re: Forever Power (almost) tabbypurr@gmail.com - 2017-05-16 07:10 -0700
      Re: Forever Power (almost) rickman <gnuarm@gmail.com> - 2017-05-16 10:14 -0400
    Re: Forever Power (almost) George Herold <gherold@teachspin.com> - 2017-05-16 08:48 -0700
      Re: Forever Power (almost) John Larkin <jjlarkin@highlandtechnology.com> - 2017-05-16 09:01 -0700
        Re: Forever Power (almost) tabbypurr@gmail.com - 2017-05-16 09:10 -0700
    Re: Forever Power (almost) bitrex <bitrex@de.lete.earthlink.net> - 2017-05-20 07:40 -0400
  Re: Forever Power (almost) Tim Wescott <tim@seemywebsite.really> - 2017-05-16 10:03 -0500
  Re: Forever Power (almost) krw@notreal.com - 2017-05-16 12:34 -0400
  Re: Forever Power (almost) Jon Elson <jmelson@wustl.edu> - 2017-05-16 13:28 -0500
    Re: Forever Power (almost) mike <ham789@netzero.net> - 2017-05-16 15:15 -0700
  Re: Forever Power (almost) bloggs.fredbloggs.fred@gmail.com - 2017-05-16 14:24 -0700
  Re: Forever Power (almost) Rheilly Phoull <rheilly@bigslong.com> - 2017-05-17 09:25 +0800
  Re: Forever Power (almost) Jasen Betts <jasen@xnet.co.nz> - 2017-05-18 20:38 +0000
  Re: Forever Power (almost) jurb6006@gmail.com - 2017-05-18 15:42 -0700
    Re: Forever Power (almost) Jon Elson <elson@pico-systems.com> - 2017-05-19 23:02 -0500
      Re: Forever Power (almost) mike <ham789@netzero.net> - 2017-05-19 22:05 -0700
      Re: Forever Power (almost) Neon John <no@never.com> - 2017-05-27 10:43 -0400
        Re: Forever Power (almost) tabbypurr@gmail.com - 2017-05-27 09:23 -0700
          Re: Forever Power (almost) krw@notreal.com - 2017-05-27 14:35 -0400
            Re: Forever Power (almost) tabbypurr@gmail.com - 2017-05-27 11:41 -0700
              Re: Forever Power (almost) krw@notreal.com - 2017-05-27 19:58 -0400
                Re: Forever Power (almost) tabbypurr@gmail.com - 2017-05-27 17:36 -0700
          Re: Forever Power (almost) Jim Thompson <To-Email-Use-The-Envelope-Icon@On-My-Web-Site.com> - 2017-05-27 12:15 -0700

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