installing a system in my 05 gs300.
trying to fin dout if the stock alternator can handle more power than what its putting out on stock.

anyone know?

 

Shouldn't be a problem if you're not going for anything too fancy. I've had a system for awhile that's capable of pushing about 1200 watts and I've not once had a problem with it. My battery is also the original from the day the car rolled off the assembly line.