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  • #31
    Holy crap! I did a search and found this thread after I went to my brothers workshop and all the "boys" told me that Prado's couldn't charge the second battery due to the alternator reducing it's voltage after the car warms up, to the point that it isn't charging the second battery???? While telling me this one guy shows me his new $1000 Redarc battery monitor 'thingy', meanwhile my borther is installing some $600 less 'fandangled redarc' thingy in his cruiser. Well after reading this thread I am none the wiser. I'll just see this weekend when my bro come camping with me and we see whose car fridge last the longest....... Not very scientific because we have different car, batteries, fridges etc.. also he put an AC compressor in his Trailblazer and is running a Redarc inverter now!??! Anyway my results from this experiment will make you all just as confused as you were after reading this thread.

    Yes first post I know.... what a waste.
    2006 Prado GXL, Manual 6sd v6, ARB Bull Bar, ARB Air Lockers front and back, under bonnet compressor (obviously), Warn 9000Lb winch, Shit Spotties, ARB dual battery's, Bilstien Suspension lift kit all round, under-bonnet diff breathers, Engel and Hella rear plugs. .

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    • #32
      After three years of a Redarc isolator not working in a professionally installed system, even after changing the diode to get more volts etc, I decided the second battery was not getting enough amps and the alternator is just too smart for it's own good, as nobody has told it there's another battery to charge. Now have a BCDC 12/20 installed, much better. I got so sick of having a dual battery system that was just not charging the aux battery, I will never again just use an isolator in a modern vehicle. This was my experience with just an isolator and the voltage upgrade diode.
      Snowy

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      • #33
        I think I might go this way too..... after noticing the not-so-old calcium 2nd battery not being charged properly with the evryday driving that the missus does.... I don't want to be buying new batteries every 18mths or so..... If only the charging volts could be modified to charge even higher than the diode mod, might have a chance with these calcuim batteries....


        Originally posted by Snowy FNQ View Post
        After three years of a Redarc isolator not working in a professionally installed system, even after changing the diode to get more volts etc, I decided the second battery was not getting enough amps and the alternator is just too smart for it's own good, as nobody has told it there's another battery to charge. Now have a BCDC 12/20 installed, much better. I got so sick of having a dual battery system that was just not charging the aux battery, I will never again just use an isolator in a modern vehicle. This was my experience with just an isolator and the voltage upgrade diode.
        [I]cheers..... Rob (macca)[/I]
        [I][B][COLOR=DarkRed]Car-4: 1996 Defender Tdi [/COLOR][/B][/I]
        [I][B][COLOR=Blue]Car-3: 1996 Discovery Tdi Auto[/COLOR][/B][/I]
        [B][I][COLOR=Green]Car-2: 1993 Suzuki Vitara 4Dr (modified for Playing) [/COLOR][COLOR=#ff0000]Now Retired[/COLOR][COLOR=Green] [/COLOR][/I][/B]
        [B][I][COLOR=DarkOrchid]Car-1: 2010 Toyota Prado 150's (Missus Car/current touring vehicle)[/COLOR][/I][/B]

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        • #34
          Originally posted by rob_macca67 View Post
          I think I might go this way too..... after noticing the not-so-old calcium 2nd battery not being charged properly with the evryday driving that the missus does.... I don't want to be buying new batteries every 18mths or so..... If only the charging volts could be modified to charge even higher than the diode mod, might have a chance with these calcuim batteries....
          A higher rated voltage booster is not required in 99% of cases for dual battery systems as
          long as adequate cabling is used.

          A higher voltage unit is available, 1V ~ 1.2V but is generally used for 24V systems,
          seriously up market audio installs and/or engine performance enhancements. Anyone
          intending to increase the overall vehicle voltage by this amount should consider
          possible effects on the vehicles electronic systems.

          Cheers
          LeighW
          HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others

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          • #35
            Cable size is not an issue as I'm using 35mm2 cable. I've never had any problems on my previous 4wd's that I've owned and they have all had the same dual battery system. Same sort of weekly driving by the missus as well, but for some reason, the 2nd Battery, which is a SuperCharge "ALLROUNDER" Battery doesn't like my current setup..... I've been told it's because most new batteries these days are Calcuim based and therefore require a slightly higher charging voltage..... I don't at this stage want to have to go to a AGM style battery yet.... if I can help it.

            Originally posted by LeighW View Post
            A higher rated voltage booster is not required in 99% of cases for dual battery systems as
            long as adequate cabling is used.

            A higher voltage unit is available, 1V ~ 1.2V but is generally used for 24V systems,
            seriously up market audio installs and/or engine performance enhancements. Anyone
            intending to increase the overall vehicle voltage by this amount should consider
            possible effects on the vehicles electronic systems.

            Cheers
            LeighW
            [I]cheers..... Rob (macca)[/I]
            [I][B][COLOR=DarkRed]Car-4: 1996 Defender Tdi [/COLOR][/B][/I]
            [I][B][COLOR=Blue]Car-3: 1996 Discovery Tdi Auto[/COLOR][/B][/I]
            [B][I][COLOR=Green]Car-2: 1993 Suzuki Vitara 4Dr (modified for Playing) [/COLOR][COLOR=#ff0000]Now Retired[/COLOR][COLOR=Green] [/COLOR][/I][/B]
            [B][I][COLOR=DarkOrchid]Car-1: 2010 Toyota Prado 150's (Missus Car/current touring vehicle)[/COLOR][/I][/B]

            Comment

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