+1 -
I am also able to manage my 1st gen's limited wattage with a slightly different mix from Matt's. I find I can run two sets of 90W heated jacket liners and 30W gloves (his and hers), GPS, Radar Detector, Intercom, cell phone charging, etc. with no problems at all. Of course the heated gear is pulsed by a Heattroller, so it doesn't consume the full rated power.
I'm hoping I can add a new set of LED aux lights without going into power deficit. If it does, I'll know it because I have a Datel battery (charging) voltmeter and can see when that happens before the battery becomes drained. Then I can just turn my heated liner down or off (The missus liner must stay on. Priorities!) or make other adjustments until the charging voltage is adequate.
AS in most things, being aware and informed is of great value. I'd suggest installing a voltmeter (if you don't already have one) and try adjusting your loads on the fly.