The 2010 to 2013 RTs all had the same charging system: a 650 watt magneto.

My guess, is that you're gonna be pretty tight on electrical power. There iust isn't a lot of extra capacity built in to them, and the magnetoes need to be spinning pretty well in order to make their power. :gaah:
I had a 2010 A&C model that I built into an RT-S. With the foglights burning, the ACS humming and the heated grips cooking digits at both ends of the bike; you'd have to be pretty close to using every possible watt.
(What??

)