pianotuna wrote:
Hi jk,
shore power outlet-->autoformer-->rv cord
That configuration will raise the voltage and lower the amperage. The number of watts stays the same.
Without the autoformer to support the voltage the amperage must go up--and that may do damage to the air conditioner. It may also melt plugs and adapters because they are carrying too many amps.
While that is true at the RV, at the outlet that the RV is plugged into, the amperage goes up. The way the Autoformer works is by pulling extra amps from the outlet and converts them to the extra voltage. It actually makes it easier to overheat the plug/outlet and/or pop the breaker feeding the RV.