Inverter and battery sizing to power my camper microwave

“For the sake of discussion, I will say this: *IF* this $300 (US) 2000 watt Renogy RNG-INVT-2000-12V-P2-US inverter is capable of 4000w for 5 sec, it would make it one of the best performing high-frequency 2000w inverters on the market, regardless of price.

Unfortunately, this is a huge if. As they say, if it sounds too good to be true, it probably is.”

X2 - Maybe it means 5 seconds before the blue smoke appears??

3 tons