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  • 24 Volts, Possible? Easy?

    I'm finding that its pretty easy to find 24v DC-DC power supplies around the world but not 12v other then the opus. Would it be possible to setup a 2nd battery in my trunk in series with the main battery to give 24v to one device in the car but not charge the whole electrical system to 24v? If so how would I set something like this up and would my cars alternator still be able to charge both batteries? Any information would be appriciated.

    Thanks,
    Jerry
    http://www.ridemods.com/secondsig.jpg

  • #2
    Your alternator is only designed to charge a 12v battery. You could put in a battery charger that runs off 12v with outputs that are completely isolated (i.e. no common ground connection, etc.) to charge the second battery in series and I think that should work. But by the time you get done spending all the money to do that, you'll surely spend way more than you're saving on the 24v supply.

    Or, you could go out and buy a vehicle with a 24v electrical system to work with the low-cost supply! Apparently its pretty common for diesel engines to have 24v (for at least the starting system) because they need more power to run the starter.

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    • #3
      actually the 12v's on the diesels are wired in parallel. 42 volt is the next new thing, but it will be a few years out. A lot of manufacturers are talking about it..I know for a fact that Ford is going to this system soon. I think they said by 2006. One of the reasons is so they can go to the new electronic valves. The solenoids will require the higher voltage.
      2005 Ford Focus ST

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      • #4
        Originally posted by gospeed.racer
        actually the 12v's on the diesels are wired in parallel. 42 volt is the next new thing, but it will be a few years out. A lot of manufacturers are talking about it..I know for a fact that Ford is going to this system soon. I think they said by 2006. One of the reasons is so they can go to the new electronic valves. The solenoids will require the higher voltage.
        Yeah, thats exactly what fords need more electronics, like the ones they have works soo nice
        Never be afraid to do something yourself. Remember - amateur built the Ark, professionals built the Titanic.

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        • #5
          Not disagreeing with you... I make my money off of Ford's stupidity, so need I say more? hahaha. Cant wait till the 6.0L diesels go out of warrenty....CHA-CHING!!
          2005 Ford Focus ST

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          • #6
            I hate Ford. Why are they allowd to exist as a company. I swear the only reason they can sell any cars is because of patriotism.

            That was a very extreme statement, but really, they need to get their stuff together.

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            • #7
              THey do not need to be out of warranty...

              Have you seen the prices for the oil filter, fuel filters(2) and and filter for that truck. Talk about expensive, an complete service on a Rolls Royce will be cheaper.

              Best regards

              frenchnew

              Originally posted by gospeed.racer
              Not disagreeing with you... I make my money off of Ford's stupidity, so need I say more? hahaha. Cant wait till the 6.0L diesels go out of warrenty....CHA-CHING!!

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              • #8
                SOOOOO TRUE.

                Dad's got a 96 Dodge with the Cummins Diesel in it and synth. oil. sucker still runs like a dream, almost no maintence. (did have his turbshaft snap once, but other than that....)


                I've got one of those 24v powersupplys kickin around, but it doesnt do me much good =)
                2000 Jeep Cherokee
                -CarPC: [_____]50% complete
                -planning done, still need a few parts
                -In-dash motorized VGA is finally out, need $$$
                -Need to replace factory HU

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                • #9
                  Originally posted by NovaKane
                  I hate Ford. Why are they allowd to exist as a company. I swear the only reason they can sell any cars is because of patriotism.

                  That was a very extreme statement, but really, they need to get their stuff together.
                  DITTO! I've had two, my girlfriend has had two. A Tarus and a Tempo, neither one was worth squat after 50K miles. Except for the 60's mustangs I wouldn't give you a nickel for a Ford. There's a reason why it's refered to as Found On the Road Dead.

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                  • #10
                    Well..unfortunately I dont get a cut of the parts tab, just the repair labor. But yes..i hear ya. It hurts to sell people wiper blades for $15 a piece...but it pays .2 of an hour to do so. That makes me a whopping $2.00 to install them. Whe hew!

                    I love my Fox ! Fox body mustangs (79-93) are my favorite..easy to work on, cheap, and fast. not to mention the look....but as for everything else....I cant stand Ford.
                    2005 Ford Focus ST

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                    • #11
                      Originally posted by gospeed.racer
                      actually the 12v's on the diesels are wired in parallel. 42 volt is the next new thing, but it will be a few years out. A lot of manufacturers are talking about it..I know for a fact that Ford is going to this system soon. I think they said by 2006. One of the reasons is so they can go to the new electronic valves. The solenoids will require the higher voltage.
                      The 7 series BMW is already using 48 volts

                      another reason is the 12 v altinators are almost hitting the limit of the amount of power they can make to charge the battery with al the new electrics in cars.
                      View My Blog


                      Click for 2GB FREE on-line storage!

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                      • #12
                        Screw it I just purchased one of these

                        http://cgi.ebay.com/ws/eBayISAPI.dll...&category=3670
                        http://www.ridemods.com/secondsig.jpg

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                        • #13
                          I drive a Ford. It is sold as a Mercury here in the US becasue alot of people don't know that Mercury is actually a ford. The car I drive is a 99 Cougar. I am pretty happy with it so far (havn't met the 50k mark)

                          I am not disagreeing with you all. I had a Ford Dealer in the family. When we would all get together for reuions it looked like a ford car lot. Escorts are crap along with most others.

                          I really like the body style of the cougars and it was within my price range. Anyways sorry to get off topic (bashing ford)
                          -Jesus- King of Kings Lord of Lords

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                          • #14
                            Originally posted by Deadnick
                            Screw it I just purchased one of these

                            http://cgi.ebay.com/ws/eBayISAPI.dll...&category=3670
                            from the item description....

                            Input: 10.5 - 15v DC.

                            Output 200watts @ 12v DC.

                            Approx. 16 amps draw at full power!


                            now...
                            12 * 16 * 1 = 192 (volts * amps * efficiency = watts)
                            awesome. so at 100% efficiency it puts out 192 watts. but it claims to put out 200 watts...hmn... its 104% efficient. brilliant. ahh. i wonder if it even has 5 volt rails...
                            rebuilding carpc... kinda..

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                            • #15
                              I'll let you know how well it works when I get it.
                              http://www.ridemods.com/secondsig.jpg

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