I made the mistake of replacing the inverter that came with my coach with another Zantrex (RS2000). To its credit, the battery charger is excellent, but the inverter function is the problem. Within 5 to 10 min after switching to invert, I get a low voltage fault. I set the low voltage at 12V. The initial battery voltage was 12.6, So the batteries were fully charged. the batteries are 2 years old, top of the line Interstate deep cycle. I keep them well maintained and clean. All connections are free of corrosion and tight. All individual battery voltages are in spec and equal. With virtually no A/C load on the inverter, I am pulling 10 to 12 amps. I know the Zantrex uses a lot of amps on invert, but even this amp draw should not cause this problem. My house batteries (4) have 464ah of reserve power . As soon as I disable the inverter, the battery voltage returns to 12.6V. I believe there is some problem in the inverter that is shunting the voltage, but if that were the case, I would expect a much higher amp draw. I wanted to see what thoughts anyone else had before throwing this thing in the dumpster and buying a Magnum 2800, which I should have done in the first place.