Vanner 20-1050 CVLW Inverter/charger

Vanner 20‑1050CUL is a 12 VDC‑to‑120 VAC inverter/charger rated at 1 050 W continuous with an integrated 55 A battery charger and transfer relay. Common failure modes reported include overheating of the IGBT module, blown main fuses or internal relays, loss of AC output due to a faulty GFCI circuit, and intermittent charging caused by degraded battery‑charger MOSFETs. First‑check diagnostics: verify input DC voltage and polarity; inspect all fuses and relay contacts for continuity; visually examine the IGBT heatsink and enclosure for burn marks or moisture; review any stored error codes via the unit’s diagnostic LED or serial interface.[oss-gpt-20b]

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