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Hi! I also own a 2980RL. I believe you have your terminology not quite right. Montana's come standard with a CONVERTER around 55 amps. This takes the 120 volts from your power cord and turns it into useable 12VDC and or allows the charging of the batteries. Unless you had an inverter installed as a special option, I believe this may clear up your question. As you found out ... about all that runs dry camping is some of the lights, the water pump, and the furnace. Someone else may jump in here and clear us both up! LOL
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