Review on 🔌 KRXNY 1000W Pure Sine Wave Stackable Grid Tie Inverter with MPPT - 10.8-30V DC Input, 110V AC Output, Ideal for 18V Solar Panels by Tim Larsen

I have 2 of these that only produce half of what is attached to them. One has 495w panels plugged in, the max I've seen is around 150w. I have 780w panels hooked up specifically to my RV and the highest wattage I've seen is 400W. The reason I know this is because on all the breakers I have a power control system connected to my circuit breaker. The only thing I can understand is that they are advertised as 110v but it is actually 220v which would explain where the other 50% power goes. I'm not sure what's wrong, but I'm expecting a production increase of up to 80% at peak, not a maximum of 50%.