Capacity of Dyna Alternator
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From: Minneapolis
Capacity of Dyna Alternator
Noob question, but I can't seem to find the keywords to pull up this information.
How much excess electrical capacity does my Dyna have? 2009 Fat Bob, by the way. The reason I ask is because I want to run heated gear for myself and the girlfriend, and I do not want to drain my battery.
Thanks
How much excess electrical capacity does my Dyna have? 2009 Fat Bob, by the way. The reason I ask is because I want to run heated gear for myself and the girlfriend, and I do not want to drain my battery.
Thanks
Outstanding HDF Member
Joined: Oct 2010
Posts: 2,706
Likes: 14
From: Near Frankenmuth, MI
There are upgrades on the "amperage" of your charging / recharging system if needed.
Often heated gear ratings are in watts of electricity, which calculated at the voltage give you amps. The bike requires a certain number of amps to run everything with variables being any additional lighting or sound amplifiers that often get added.
I'm not familiar with the ratings but you can locate the details of the heated gear requirement, and locate the detail on the current rating of the charging system your bike has. It's going be a little math once you get those details you still will not know for sure the bike's current draw when running or the extra amount it has to recharge the battery and run more accessories ... so it is anybody's guess what the actual outcome is.
Someone who has tried two sets of heated gear on the same bike or one with similar current ratings might know.
Get thegear and plug everything in and see if the lights dim and the bike stalls. (I know that's not what you were hoping to hear.)
Many small bikes are limited to 32 amp, older rides like mine came with only 22. Add a few brake lights and some spots and it drained the battery while I used the brake. I upgraded to 32 amp which became a standard but I believe today you have 40+ amp basic factory and can convert to an even heavier setup (Stator, Rotor and rectifier) in a 3 phase system that provide 50+ amps. That's trailer with lights and all the new heated gear including seat and grips.
Shared what I know and will hang out to hear more about this...
Often heated gear ratings are in watts of electricity, which calculated at the voltage give you amps. The bike requires a certain number of amps to run everything with variables being any additional lighting or sound amplifiers that often get added.
I'm not familiar with the ratings but you can locate the details of the heated gear requirement, and locate the detail on the current rating of the charging system your bike has. It's going be a little math once you get those details you still will not know for sure the bike's current draw when running or the extra amount it has to recharge the battery and run more accessories ... so it is anybody's guess what the actual outcome is.
Someone who has tried two sets of heated gear on the same bike or one with similar current ratings might know.
Get thegear and plug everything in and see if the lights dim and the bike stalls. (I know that's not what you were hoping to hear.)
Many small bikes are limited to 32 amp, older rides like mine came with only 22. Add a few brake lights and some spots and it drained the battery while I used the brake. I upgraded to 32 amp which became a standard but I believe today you have 40+ amp basic factory and can convert to an even heavier setup (Stator, Rotor and rectifier) in a 3 phase system that provide 50+ amps. That's trailer with lights and all the new heated gear including seat and grips.
Shared what I know and will hang out to hear more about this...
Last edited by JohnnyC; Sep 7, 2011 at 01:55 PM.
Thread Starter
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Cruiser
Joined: Sep 2009
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From: Minneapolis
Thanks.
Heated jackets are rated at 6.4 amps each max
Heated gloves are rated at 2.2 amps each max
So with both myself and the girl we are pulling 17.2 amps together. Max.
No other electrical accessories. No additional lights or anything
Heated jackets are rated at 6.4 amps each max
Heated gloves are rated at 2.2 amps each max
So with both myself and the girl we are pulling 17.2 amps together. Max.
No other electrical accessories. No additional lights or anything
Outstanding HDF Member
Joined: Oct 2010
Posts: 2,706
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From: Near Frankenmuth, MI
I see you ride a custom machine, any chance you know what charging system specs are on your bike?
Do you know the builder? He just might know what the bare minimum is needed to run and recharge.
17.2 amps would kill my battery and might even stall my bike from the voltage drop.
Do you know the builder? He just might know what the bare minimum is needed to run and recharge.
17.2 amps would kill my battery and might even stall my bike from the voltage drop.
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From: Minneapolis
The build on the engine only addressed the top end. Nothing was done on the charging system, so that is dead stock Harley.
I was riding all weekend with a 12.8 amp draw. Granted we were not using the jackets constantly, but damn close to constantly.
I asked the guys at the Harley Parts counter and their advice was to not worry about it. That the full draw from two full sets of the heated gear harley sells (which are made by Gerbing) will not overdraw the charging system. And since that includes pants I think I am gonna be OK.
I was riding all weekend with a 12.8 amp draw. Granted we were not using the jackets constantly, but damn close to constantly.
I asked the guys at the Harley Parts counter and their advice was to not worry about it. That the full draw from two full sets of the heated gear harley sells (which are made by Gerbing) will not overdraw the charging system. And since that includes pants I think I am gonna be OK.
Outstanding HDF Member
Joined: Oct 2010
Posts: 2,706
Likes: 14
From: Near Frankenmuth, MI
If the parts counter guy says no problem, worry .... he want to sell you that charging upgrade but he's waiting for the sting to wear off from you just buying the heated gear. He know's your good for a 3 phase upgrade and that your bike will be in for service shortly.
Just kidding. Glad to hear it's a go. I'm afraid if I had the heated gear I'd be tempted to ride in the snow.
Just kidding. Glad to hear it's a go. I'm afraid if I had the heated gear I'd be tempted to ride in the snow.
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Cruiser
Joined: Aug 2011
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From: Virginia
Total motorcycle.com has the 2009 Dyna Superglide electrical specs listed........
Electric
Battery (per Battery CouncilInternational Rating)
Sealed, maintenance-free, 12V,19-amp/hour, 270 cca
Charging Three-phase, 40-amp system (493W @ 13.5V, 2000 rpm, 540W max power @ 13.5V)
Basic Ohm's law is DC Watts/volts=amps
In a perfect world you have 36 amps available at 2000 rpm, 40 amps maxed out. Dealer is right, should be no problem,
Stay warm.
John
Electric
Battery (per Battery CouncilInternational Rating)
Sealed, maintenance-free, 12V,19-amp/hour, 270 cca
Charging Three-phase, 40-amp system (493W @ 13.5V, 2000 rpm, 540W max power @ 13.5V)
Basic Ohm's law is DC Watts/volts=amps
In a perfect world you have 36 amps available at 2000 rpm, 40 amps maxed out. Dealer is right, should be no problem,
Stay warm.
John
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