Can't ride like the rest of you fellas, so I did some tinkering inside the garage. I've read the recurring question of how much extra 'watts' does the Tenere have for accessories, so I figure I could at least provide some info that helps although I don't have enough information to 'fully' answer the question..yet.
One clamp style meter with hall effect sensor for measuring DC current.
Reading at left fuse box feed. Big power consumers hooked to that box are 2x 55W headlights, followed by the fuel pump.
Reading at right fuse panel feed. Majority of power consumed by the ignition system (radiator fan not on). Second being various lighting.
Add the two readings together and we come up with roughly 14.4A of steady current draw...so 14.4 X 14VDC (measured) =
about 202 Watts already spoken for prior to hooking up any accessories.
I have never seen an electrical system put out the full rating. No chance to actually load check the Tenere yet, but just saying to beware and err on the conservative side.
I'd say 300W of headroom is a fair assumption (500W - 200W) is a figure that would leave some wiggle room. Sooner or later, someone how has a volt meter on their bike and has added enough lights and heated gear will reach the actual limit, so we will have a very rough idea of where that happens, IF myself or another 'geek' doesn't attack it with a bank of headlight bulbs first. 8)
Beware of just going into the manual, doing a current X voltage calcultion to get a 600W capacity, which is more of a rating for the wires. Yamaha advertises a 580W capacity which probably is arrived at using a very small power factor.
A few disclamers.
Only steady state current draw items were considered.
The ABS motor draw is totally separate from these fuse box feeds, but I'm assuming its consumption is negligible when not activated...maybe somebody can step in who knows the answer to that. I can get the reading, it's just not quite so convenient.
Extra notes:
- A few question have surfaced regarding the fan, and whether the fuse rating is appropriate. With the fan running, I noted roughly a 5A increase in current consumption, the fuse is rated at 20A, so it appears they have factored-in the inrush current properly. I didn't specifically measure the inrush current, but 4x the steady current draw sounds about right for a motor. Any fuse rated less than that and you'd better be monitoring the fan operation closely.
- With high beam selected, the solenoids add about 1A of current draw.