After a full 2-week fever, I’m back into business :D.
Things aren’t great to start off. To sum it up, the inverter died after I connected a chineese steamer apparently rated for “120 W”, when in reality, it drew around 500 W from my wall. My inverter tried to maintain its voltage and ended up killing its MOSFETS. I really hope the MOSFETS are the only ones damaged.