Electrical Output?

[CIP57_imp]

Well just received this from Scott at the Powerlet company....


A few things to note, all of the math you're doing is based on 12 volts.
While it is a '12 volt system', 12v voltage regulators are designed to work
at 14.2-14.4 volts, and motorcycle batteries at rest are generally near 13
volts, and shoot up to between 13.3 and 13.8 volts while charging. So the
math of calculating watt/amp usage of electronics must be based on at least
13 if not 13.8 volts (these are the voltages we use in bench testing our
products). So when hooking up your outlets, devices, or garments directly
to the battery the amp usage is calculated off whatever the voltage of the
source is, which is the battery, and battery voltage is generally 13-13.8v.
Another thing to note is that while you are using your heated clothing at
50% power, the controller does not regulate temperature by regulating the
amperage at a solid number. It sends full amperage through the garment but
it blips the power in a wave pattern to control the temperature. So even at
the lowest setting with the jacket and gloves on, it is still blipping the
full 140-150 watts, but only for a fraction of the time it does on higher
settings.

Also, the stated 336 watt output for your stator is the 'peak' output,
which is probably in the area of 4000-5000rpms. So at idle and city riding
it is substantially less than that. So even at peak output while riding,
the bike is putting out 336 watts, but that's at 14.4 volts via the
regulator, not 12, so doing the math total output is 24 amps, not 28. Take
away the 17 amps they say the bike uses and that only leaves you with 7
amps. However you do get to raise the voltage calculation of that 7 amps to
the 13.5 volts that the battery operates at. This gives you about 90 watts
of excess.

However, if Honda is doing their math properly using 13.5 volts from the
battery and they say you still have 11 amps to use, that means that the
bike does not use 17 amps to power itself, but 13. However I find it very
difficult to believe that the CB1100 can power itself using only 150 watts
of power as most carburated bikes use around 185, and a common operating
load for a fuel injected bike is substantially higher at around 250-285
watts.

All I can say is use extreme discretion when using heated clothing with
your bike before you free up some excess electrical capacity. If you have
any other questions please let me know.



Seems I'm back at square one........ and that is , that i will need to dial back on my nice toasty gear until i cut back some power from other areas.

Anyone know if its even possible to get a higher output stator?

Ken,

I'm on the ST1300 site and will try to look up more info. I know the St1100 puts out 28amps same as our bikes, guys have bumped them up to 40 amp with after market equipment.
Edit: Just looked at the St site, the St1300 puts out 740 watts and running usage is about 450 leaving about 300 watts free
Its gets involved to upgrade the alternator on the St1100 as i would presume it would for our bikes.