The AIMS Power PS‑1200QAT PWRIX120012S is a 1,200 W pure sine‑wave inverter with an integrated automatic transfer switch that converts 12 V DC to 120 V AC (60 Hz) and automatically switches between shore power and battery. Common failure points for this class include over‑voltage shutdowns due to input voltage spikes, overheating of the MOSFET bridge when operating near its surge limit, and failure of the transfer switch contacts from corrosion or mechanical wear. First‑check diagnostics should verify that the DC input is within 10–16 V, confirm the AC output voltage and frequency are within spec, inspect the inverter for visible heat damage or blown fuses, and review any error codes displayed on the unit’s indicator panel.[oss-gpt-20b]