View Single Post
Old 10-17-2011, 08:08 PM   #61
Geared up and ready.
tofire409's Avatar
Joined: Sep 2009
Location: Toronto, CDN
Oddometer: 706
I was looking at this thread when I came across this post:

"F800GS/F650GS Electical System Capabilities
Measurements made by Joel Wisman on new F800GS
Amps Watts * Notes
Engine off
Key on 1.8A 25W *1.74 amps if kill switch is in kill position
Key on, high beam on 5.7A 77W
Engine running
Low beam on (baseline) 10.8A 147W * Add other current draws to this value
High beam on 4.1A 56W
Heated grips low 2.0A 28W Max draw
Heated grips high 3.4A 46W Max draw
Cooling fan 4.7A 64W
Alternator output (held at constant 13.6 volts)
1280 rpm (idle) 17.7A 241W *94 watts over baseline load
3000 rpm 25.9A 352W *205 watts over baseline load
4500-7500 rpm 27.8A 378W *231 watts over baseline load**
* Measurements made while holding voltage to 13.6 volts. Watts = Amps x 13.6 volts.
** System can deliver 27.8 amps (current-limited) at 14.4 volts, or 400 watts (per BMW spec)
Current draw after turning engine off with key:
First 3.5 seconds 830 milliamps Computer shut-down, etc.
Next 3 seconds 170 milliamps
Next 54 seconds 88 milliamps
Thereafter 1.3 milliamps For clock and volatile memory"

It could explain why some batteries and stators give up.
Damn I wish all roads were dirt. 2011 White F800GS, 31,000 km's
Toronto to Maine and back, Toronto to Boston -The Long way, To the Dragon, 2days TCAT
tofire409 is offline   Reply With Quote