My alternator solution.......
....on my 2004 V-Strom 650, I installed the Eastern Beaver kit that allows me to flip a switch and cut off one headlight.
I installed an LED tail light.
I run a headlight modulator, so HID is not an option.
I have OEM heated grips. I have a full Gerbings Microwire heated kit, Gloves, Jacket, Pants, and Socks. I have the dual heat controller.
I can run the entire heated kit with zero problems.
I have a Deka AGM battery.
Just do it.