Xantrex REV.2 is a 2000‑W pure sine‑wave inverter/charger that uses three microprocessors and a bi‑directional power topology to achieve >90 % efficiency with high surge capability. Common failure modes for this model include input DC overvoltage or undervoltage, overheating of the MOSFET stack or heat sink, failure of the output filter capacitors causing waveform distortion, and firmware corruption leading to lock‑up or error codes. First‑check diagnostics: verify 12 V/24 V battery voltage and polarity; inspect the main power board for burn marks, cracked solder joints, or swollen electrolytic caps; confirm that the heat sink is properly attached and cooling fans (if present) are operational; then review any displayed fault codes on the LCD panel.[oss-gpt-20b]