75 amps (Charger) draws over 1,000 watts if batteries hungry.. at least in many cases 75 times 14.6 times inverse of conversion loss (WHich can be 20 percent or more when combined with pwoer factor) and the 1000 watt generator is .. overloaded. Espicaly since that's 1,000 PEAK. Oh I see yours is a 2000 watt (2200 peak) still if there is something else there. OVERLOAD (Water heater???)
NO premium or Marine grade (no Alcohol) will not improve generator performance the overload light refers to the generator NOT the engine.
