I have a similar issue with my 2016 RedHawk 23 on the 4500 Chevy Chassis, Main chassis battery reads 12.6v, turn key nothing happens, use Coach Battery Assist and still nothing, but if I pull chassis battery and use Coach Assist the RV will start, connect the chassis battery, runs fine, gauge reads close to 14 volts, 13.6 reading with VOM. I will follow this thread and relay any info I figure out, Joe
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