Voltage - how low is too low? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 11-08-2008, 11:57 PM Thread Starter
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Voltage - how low is too low?

I've loaded up the bike with enough electrical accessories that it's obvious some things need to be shut off to keep the bike health. The big draws include Tourmaster Synergy gloves and vest, Oxford heated grips and 70watts worth of running lights. When the bike has no additional load the meter is usually reading 14.2 volts. As I start adding greater loads on the system the voltage begins to drop. My question is what should I be watching for on the volt meter when riding along at 4000 rpm? How low do I allow the voltage to drop before needing to turn off accessories?


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post #2 of 14 Old 11-09-2008, 12:57 AM
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12.6-12.8V, depending on the accuracy of the meter and any drop in the lines, is the minimum to keep the battery charging.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #3 of 14 Old 11-09-2008, 02:12 AM
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Hi

I see you have added running lights, what size are these in Watts? I added a set of PIAAs, both together an added 110W to the system. To allow this, I also installed a headlight cut off switch, so when I want the Aux lights, flick the switch, one headlight drops out and instantly 55W extra available to run the Aux lights.

Maybe try that?

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post #4 of 14 Old 11-09-2008, 08:08 AM Thread Starter
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Quote:
Originally Posted by TravellingStrom View Post
Hi

I see you have added running lights, what size are these in Watts? I added a set of PIAAs, both together an added 110W to the system. To allow this, I also installed a headlight cut off switch, so when I want the Aux lights, flick the switch, one headlight drops out and instantly 55W extra available to run the Aux lights.
I added these running lights and swapped the bulbs for 35w. Interesting idea about running a cutoff switch for a headlight. I don't think I'll need to go that far just yet. I'm able to run a combination of gear as needed and stay above the minimum Greywolf mentioned. If it gets too close I'll probably just pull the wire on one of the running lights for the winter.


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post #5 of 14 Old 11-10-2008, 04:22 AM
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The headlight cut out switch and harness was cheap, about $30 from memory and it is a simple plug and play with the old headlight connector.

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post #6 of 14 Old 11-10-2008, 06:30 AM
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Measure your load in watts. From memory the 07 and earlier Wee's have about 125 watts of spare capacity, the 08's and newer have more.
I'm sure somebody will chime in with the exact figures.
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post #7 of 14 Old 11-10-2008, 06:44 AM
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'08s and newer have another 25W. The whole charging thing is very dynamic. 100-125W is the figure normally given for excess capacity on '07s and earlier but watching the voltmeter is the way to tell what's going on. I like the idea of losing one headlight before a running light if the light output is sufficient. That preserves the triangle of light which aids position identification.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html
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post #8 of 14 Old 11-10-2008, 07:07 PM Thread Starter
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Quote:
Originally Posted by TravellingStrom View Post
The headlight cut out switch and harness was cheap, about $30 from memory and it is a simple plug and play with the old headlight connector.
I've never seen a pre-wired harness/switch combo. Do you have a source handy?


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post #9 of 14 Old 11-10-2008, 07:44 PM
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There is a harness at http://www.easternbeaver.com/Main/Bi...html#lobeamcut which includes a link to a switch.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general-...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informat...-you-have.html
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post #10 of 14 Old 11-10-2008, 08:48 PM Thread Starter
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Should have guessed it would be Eastern Beaver. I have their horn harness on the 650 and really like it. Just wish I had enough room on the handle bars for their good looking switch. Between the GPS and grip warmer switch just can't make that one fit. Have to use one of the others with my own switch somewhere. Thanks.


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