2012 Limited Charging System
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Tourer
Joined: Oct 2011
Posts: 290
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From: Ventura, CA
2012 Limited Charging System
At what point should I look at upgrading the charging system on a 2012 Limited? I have installed heated seats and a 500W amp. The seats are about 36W max but the 500W amp makes me a bit nervous. The stock charging system is about 600W. I have noticed the radio resets once in awhile while starting which leads me to believe that the battery isn't staying fully charged.
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Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
your radio will go off when starting.
I strongly doubt that your amp uses 500 watts ( that must be a sound spec)
here's how watts work
at 12 volts, 100 watts = 8.3 amps ---
you can add up the "watts" and calculate "current draw" in amps
The formula is OHM's Law and online calculators are available
but 100 w = 8.3 amps is easy to remember.
Your charging system should be just fine
mike
I strongly doubt that your amp uses 500 watts ( that must be a sound spec)
here's how watts work
at 12 volts, 100 watts = 8.3 amps ---
you can add up the "watts" and calculate "current draw" in amps
The formula is OHM's Law and online calculators are available
but 100 w = 8.3 amps is easy to remember.
Your charging system should be just fine
mike
Thread Starter
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Tourer
Joined: Oct 2011
Posts: 290
Likes: 1
From: Ventura, CA
Lol, thanks for the electronics 101. I'm an electrical engineer so I think I can figure out that one. I know the amp isn't drawing 500W continuously. I just don't know how much headroom is available on the charging system for add ons. At some point your gonna draw too much and not charge the battery fully while riding.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
Rare is the rider who isn't afraid of ohm's law!
fair amount of headroom in the charging system on these bikes.- 50 amp charging system, that's a total of 585 watts
and if you look into it, the electrical system on your model bike is way advanced, has some neat features, relays and logic circuits
Voltage drop within the circuits is almost 0
mike
fair amount of headroom in the charging system on these bikes.- 50 amp charging system, that's a total of 585 watts
and if you look into it, the electrical system on your model bike is way advanced, has some neat features, relays and logic circuits
Voltage drop within the circuits is almost 0
mike
Last edited by mkguitar; Dec 2, 2011 at 01:39 PM.
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From: Las Vegas
Lol, thanks for the electronics 101. I'm an electrical engineer so I think I can figure out that one. I know the amp isn't drawing 500W continuously. I just don't know how much headroom is available on the charging system for add ons. At some point your gonna draw too much and not charge the battery fully while riding.
Last edited by MADHOG; Dec 2, 2011 at 03:19 PM.
Thread Starter
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Tourer
Joined: Oct 2011
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From: Ventura, CA
I ride every day so no need for a tender. This is my main transportation.
Mike, Ohm's law is your friend. I just couldn't find anything telling me what the typical load is on the charging system. I guess I would be surprised if it was more than a couple hundred watts. Maybe I'll ask J&M what the typical current draw is on their amp at 1/2 volume.
Mike, Ohm's law is your friend. I just couldn't find anything telling me what the typical load is on the charging system. I guess I would be surprised if it was more than a couple hundred watts. Maybe I'll ask J&M what the typical current draw is on their amp at 1/2 volume.