Depends. I think when you get to pulling 25-30 additional amps off the stock system things get sketchy. I have ridden with GPS, Radar, phone charger and Heated suit (gloves, pants and jacket) and could not get max setting on the suit. There are upgrades on the power system you can do though. If you are really going to draw amps, you should look into something like an Amplink. With this you can control power distribution with you phone. Also it will be sure all those accessories are properly managed on the fly. For example if you have everything on just pull out the phone, divide up the power and keep it below 30 amps and you are good to go. Makes wiring cleaner and gets rid of all those relays!
Maybe
@c10 knows exactly how many amps you can draw off the system, he's the DIY guy after all!