1 amp 2 amp 3 amp 4

Discussion in 'Electrical' started by PineRiver, Nov 7, 2008.

  1. PineRiver

    PineRiver Member

    I am trying to determine the electrical demand on my 05 Ultra Classic, I tried the service manual and totaled the list of the bulbs and curise control etc when i added all the numbers it equals the out put of the alternator. Is it reasonable that all the output would be used up from the beginning? So how should i determine the electrical demand? I looking for any ideas?:newsmile026:
  2. dangerdan

    dangerdan Junior Member

    I'm not sure why you would need this unless your planing on adding some electrical accesories but if you need this right to the amp ,buy yourself a high quality Volt/Amp meter with an induction pickup clamp capable of measuring at least 60 amps DC.

    That total alternator output maybe 100% of rated capacity, but remember the starter is only on for a few seconds so once the engine starts that load drops quite a bit.
  3. Zamadan

    Zamadan Active Member

    Some info I got on this was:

    Give or take a 22A alternator would put out approx 18 amp @ 1500 rpm and 22 Amp at 2800 rpm and have a spare 8 amp @ 1500 rpm and 11.3 amp @ 3000 rpm.
    Give or take a 32A alternator (FXD) would put out approx 23 amp @ 1500 rpm and 32 Amp at 3000 rpm and have a spare 11.6 amp @ 1500 rpm and 19.9 amp @ 3000 rpm.
    Give or take a 38A alternator (FX series) would put out approx 30 amp @ 1500 rpm and 36 Amp at 2500 rpm and have a spare 11.8 amp @ 1500 rpm and 18.6 amp @ 3000 rpm..
    Give or take a 45A alternator would put out approx 39 amp @ 1500 rpm and 44 Amp at 2500 rpm not sure of the spare amp on this or the 50 amp gen. My guess is the 45A has 20 spare amp @ 2800 rpm and the 50A has 22 at 3000 rpm.
    Last edited: Nov 8, 2008