A starting air conditioner can pull 18 amps (more if its a 15K) and then stabilize at about 11-12 amps (again more if it's a 15K) at 120 volts.
At some campgrounds the voltage is not 120 volts. This causes a starting problem as the compressor needs a certain number of watts (power) to start moving. Since power = volts times amps, if the voltage is not there, the compressor "makes up for it" by pulling more amps.
This can damage your compressor's windings over time. Since the voltage your camper "sees" is load dependant, running close to your camper's maximum in campgrounds with poor delivery wiring can cause your campsite to see lower voltage than your neighbor.
This is why if your air conditioner seems to struggle to start or your main (or AC) breaker opens when the compressor kicks in you should reduce the load on your camper.
In hot sticky weather, it is always a good idea to run the hot water heater and the fridge on Propane. You will get the added benefit of faster hot water recovery and a colder beer since propane is a far more efficient heat source than electric.
If you need to reduce it further, you can add a start DELAY relay to the fan (which is also an inductive load like the compressor) so that the compressor will start running a second or two before the fan motor starts when the thermostat calls for cold air.
ICM Relay,Time Delay - Cooling Equipment Relays - 4E233|ICM102 - Grainger Industrial Supply
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