TRACKSIDE Grip Heaters

Memnok · 12-29-2012, 09:44 AM

I got a pair of these for Christmas, but they don't seem to have any information on them as to the wattage they will draw from the system. Does anyone happen to know how much they will pull? I have 185 watts from the XR650L stator, but I am adding some ADVMonster 60 LED lights too.

kubiak · 12-29-2012, 10:07 AM

Quote:

Originally Posted by Memnok

I got a pair of these for Christmas, but they don't seem to have any information on them as to the wattage they will draw from the system. Does anyone happen to know how much they will pull? I have 185 watts from the XR650L stator, but I am adding some ADVMonster 60 LED lights too.

i have a set on my f650gs and they work great! ran them last season and now this season with no problems so far. i dont think they take much wattage at all, i thought i read somewhere they take around 15 and 25 watts on high? the resistor gets way hot so make sure its not touching anything that can melt. i actually took the resistor off and run them straight on high.

mbfj40 · 12-29-2012, 10:16 AM

If you've got an electrical meter handy that you can measure Ohms with it's a snap to do the math for Watts.
Measure the resistance (Ohms) of your new grip heaters across the leads that would attach to the battery. Check both Hi and Low settings if you want both wattages.
The math is Voltage squared, divided by Resistance (Ohms) equals Watts.
So just round off your voltage to 13 volts (a few tenths either way won't be that big of a deal) then square it (13x13=169) now divide that (169) by the Ohms reading on your grips and there ya have it.
mike

duck · 12-29-2012, 04:02 PM

JMHO: Ditch the switch and resistor and spend $4 on one of these. Since it's PWM a lower setting draws less power.

http://www.advrider.com/forums/showthread.php?t=737165

kubiak · 12-29-2012, 04:10 PM

am i ok by just running them through the hi lo switch that came with them? i cut the resistor out and run them straight through the high setting on the toggle. they get pretty hot but feel great in the cold weather. does the hi lo switch have a resistor in it or is it just a two way toggle?

Johnf3 · 12-29-2012, 05:25 PM

Most of these type of grip heaters pull around 45W on high.

MaestroPNW · 12-29-2012, 06:42 PM

Easy - just measure the resistance of both together in parallel. Assuming it's "R" Ohms, plugging them into 12V will produce I = 12 / R amps. The consumed power then will be equial to 12 * I = 12 * ( 12 / R ) = 144 / R Watts

12-29-2012, 09:44 AM	#1
Memnok ^OP Fly high, go far. Joined: Mar 2008 Location: Turlock, Ca Oddometer: 341	TRACKSIDE Grip Heaters I got a pair of these for Christmas, but they don't seem to have any information on them as to the wattage they will draw from the system. Does anyone happen to know how much they will pull? I have 185 watts from the XR650L stator, but I am adding some ADVMonster 60 LED lights too. __________________ Clint >>> 2007 XR650L <<< ---------------------------------- Good government is no substitute for self-government. Mahatma Gandhi That government is best which governs least, because its people discipline themselves. - Thomas Jefferson

12-29-2012, 04:02 PM	#4
duck PsyKotic Waterfowl Joined: Mar 2004 Location: Seattle (Berkeley with rain) Oddometer: 9,967	JMHO: Ditch the switch and resistor and spend $4 on one of these. Since it's PWM a lower setting draws less power. http://www.advrider.com/forums/showthread.php?t=737165 __________________ 93 K1100LT, 94 K1100RS, 86-97 K75F (K75/100/1100 Frankenbrick), 91 K1, 05 KTM 450 SMR IBA #17739 (SS1K, BBG, 50CC) http://home.comcast.net/~smithduck/BMW_Tours.htm

12-29-2012, 05:25 PM	#6
Johnf3 Studly Adventurer Joined: Apr 2007 Location: West Texas Oddometer: 989	Most of these type of grip heaters pull around 45W on high. __________________ '06 950 Adventure S '10 Husaberg FX 450 '01 KTM 520exc

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12-29-2012, 10:16 AM	#3
mbfj40 Gnarly Adventurer Joined: Apr 2007 Location: Modesto, Ca. Oddometer: 151	If you've got an electrical meter handy that you can measure Ohms with it's a snap to do the math for Watts. Measure the resistance (Ohms) of your new grip heaters across the leads that would attach to the battery. Check both Hi and Low settings if you want both wattages. The math is Voltage squared, divided by Resistance (Ohms) equals Watts. So just round off your voltage to 13 volts (a few tenths either way won't be that big of a deal) then square it (13x13=169) now divide that (169) by the Ohms reading on your grips and there ya have it. mike

12-29-2012, 04:10 PM	#5
kubiak Beastly Adventurer Joined: Nov 2007 Location: madera california Oddometer: 4,139	am i ok by just running them through the hi lo switch that came with them? i cut the resistor out and run them straight through the high setting on the toggle. they get pretty hot but feel great in the cold weather. does the hi lo switch have a resistor in it or is it just a two way toggle?

12-29-2012, 06:42 PM	#7
MaestroPNW Me! Joined: Jul 2010 Location: Greater Seattle Oddometer: 51	Easy - just measure the resistance of both together in parallel. Assuming it's "R" Ohms, plugging them into 12V will produce I = 12 / R amps. The consumed power then will be equial to 12 * I = 12 * ( 12 / R ) = 144 / R Watts