Idle control on my 7500w generac is only from 3600 to 3250. You dont get
much increase in life with that reduction. Idle is 6-800 rpm. Idle
control must spool up to 3600 immediatly on demand of a draw so they
cant allow them to really " idle" at 600. For long life a honda or
Yamaha inverter style does better as it can run at 900 rpm generating,
if minimal current is needed.