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Charging at idle

Scheduled Pinned Locked Moved DTR
electrics
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  • Hybrid_Theory01H Offline
    Hybrid_Theory01H Offline
    Hybrid_Theory01
    wrote on last edited by
    #1

    Hello guys, what voltage a DTR 125 usually makes to charge the battery at idle? Enough to feed the battery? 12.5v plus

    markus.wM S 2 Replies Last reply
    0
    • Hybrid_Theory01H Hybrid_Theory01

      Hello guys, what voltage a DTR 125 usually makes to charge the battery at idle? Enough to feed the battery? 12.5v plus

      markus.wM Offline
      markus.wM Offline
      markus.w
      wrote on last edited by
      #2

      @Hybrid_Theory01 minimum 13.8 volts. 14v for a gel battery.

      1 Reply Last reply
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      • Hybrid_Theory01H Hybrid_Theory01

        Hello guys, what voltage a DTR 125 usually makes to charge the battery at idle? Enough to feed the battery? 12.5v plus

        S Offline
        S Offline
        SpookDog
        wrote on last edited by SpookDog
        #3

        @Hybrid_Theory01

        I’m my experience idle voltage can be a bit lower than at say, 2500rpm, but I have an early (1988) stator setup with 3 separate coils, 1 each for lights, ignition and charging. AmpH/wattage is another thing, I think...

        Why do you ask?...

        Hybrid_Theory01H 1 Reply Last reply
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        • S SpookDog

          @Hybrid_Theory01

          I’m my experience idle voltage can be a bit lower than at say, 2500rpm, but I have an early (1988) stator setup with 3 separate coils, 1 each for lights, ignition and charging. AmpH/wattage is another thing, I think...

          Why do you ask?...

          Hybrid_Theory01H Offline
          Hybrid_Theory01H Offline
          Hybrid_Theory01
          wrote on last edited by
          #4

          @SpookDog i was getting 11 something volts at idle with lights on and a bad chinese velocimeter, the battery was also new, now im rebulding the bike and i will go over the wiring, i will also upgrade the velocimeter, i was thinking about building my own RPM, speed and temperature detector with a Arduino, 3 sensors and a oled display, problem is that it might be a little to bulky, im still researching about it, if you guys have any experience with arduinos i would love the help!

          S 1 Reply Last reply
          0
          • Hybrid_Theory01H Hybrid_Theory01

            @SpookDog i was getting 11 something volts at idle with lights on and a bad chinese velocimeter, the battery was also new, now im rebulding the bike and i will go over the wiring, i will also upgrade the velocimeter, i was thinking about building my own RPM, speed and temperature detector with a Arduino, 3 sensors and a oled display, problem is that it might be a little to bulky, im still researching about it, if you guys have any experience with arduinos i would love the help!

            S Offline
            S Offline
            Scootjockey
            wrote on last edited by
            #5

            @Hybrid_Theory01
            On tick over you with lights on you would be lucky to get more than 12.5v, and 11.5v sounds about right. But in the real world we don’t ride on tick over. Measure the charge voltage @3.5k and you should be looking at 13.8 to 14.5 volts. As a rule of thumb 50w @12vdc is about 4 amps current draw. And the last time I checked DT has a 3amp battery, and I would always knock 25% off the battery so you could be looking at a battery with 2.25 amps. Which is not a lot if you want to play with stuff on the bike.

            Hybrid_Theory01H 1 Reply Last reply
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            • S Scootjockey

              @Hybrid_Theory01
              On tick over you with lights on you would be lucky to get more than 12.5v, and 11.5v sounds about right. But in the real world we don’t ride on tick over. Measure the charge voltage @3.5k and you should be looking at 13.8 to 14.5 volts. As a rule of thumb 50w @12vdc is about 4 amps current draw. And the last time I checked DT has a 3amp battery, and I would always knock 25% off the battery so you could be looking at a battery with 2.25 amps. Which is not a lot if you want to play with stuff on the bike.

              Hybrid_Theory01H Offline
              Hybrid_Theory01H Offline
              Hybrid_Theory01
              wrote on last edited by
              #6

              @Scootjockey yes, with little RPM the bike charges the battery and even spikes to little over 14 volts rarely, i was just a bit worried about idle

              S 1 Reply Last reply
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              • Hybrid_Theory01H Hybrid_Theory01

                @Scootjockey yes, with little RPM the bike charges the battery and even spikes to little over 14 volts rarely, i was just a bit worried about idle

                S Offline
                S Offline
                SpookDog
                wrote on last edited by
                #7

                The mot guy put an advisory on my bike about the lights at tickover. Reckoned that the stator was buggered. I tried to explain to him but ‘he had one when younger’ and so was right 🙄

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