Battery not Charging - High output Alternator?

[Pauley]

I think I read output is 336W somewhere.

Yes, according to the '13 service manual, the capacity of the alternator is 336 watts at 5000 rpm.

Yes, according to the '13 service manual, the capacity of the alternator is 336 watts at 5000 rpm.
What happens to the output of the stator at say 3000 rpm? Does it decrease proportionately?

[Tezza_imp]

Having been playing with alternators lately, I had a look at the Honda schematic. It uses a delta wound job which produces a fair amount of current (approx 23 amps at 5000 rpm) if my math is correct. The charge curve for most 12volt motorcycle alternators are pretty much the same and they seem to reach about 90% of their output by 3000rpm and then fall off fairly linear below these revs. Considering that I have an older 4 cylinder car that only has a 40 amp alternator, 23 amps sound ok considering you have only half the number of things drawing current. If you were concerned about battery voltage and were considering connecting up any USB devices, one of these may come in handy.
http://www.ebay.com.au/itm/Double-USB-Ch...SwbYZXcjJm

[AzBob_imp]

28 amps isn't a heck of a lot with ~16amps of heated jackets and gloves, and 2.1amps of USB charger going. (just the headlight is 4.5amps itself). That said, I've run one heated jacket without problems.