Why Won't My 1000W Inverter Run my 800W Coffee Maker?

If it hasn’t been mentioned already, another thing to consider is that upon initial start-up your seemingly 800w coffee maker load is slightly inductive, meaning that upon initial start up, its likely of a greater (though brief) load that the posted wattage suggest, and your inverter is likely short on necessary headroom... Now consider other possible bottlenecks like battery size and condition, and often overlooked cable size and length of cable run snd you have the perfect storm...