Voltage too low is okay for the cheesy 12v radio or whatever, but I didn't know how to keep, say, 20 volts going in to it when the wind kicked up.  GHurds controller could start "dumping" around 12v and enough loads would stall out that genny enough to keep it down.  But man, didn't you have to be careful to balance your loads?  Cuz I know in my case that the light stalled it to the point that it would dim out, then come back, then dim.... like a really lame strobe light.