Originally Posted by Charlie.Reynolds
Can anyone tell me what the Automatic Energy Select Switch does on my 2015 Rockwood model 8289WS 5th wheel?
Oh the things you find when trying to answer questions on this board!!!
It seems that the electrical code for "recreational vehicles" states that if you have 30 amp service, you cannot have more than 5 circuits in your panel and you cannot connect more than two "thermostatically controlled loads." Such loads would include the water heater, the air conditioning, and electric fireplace. I don't think the furnace counts since it is not a 120 volt unit. Don't know about the reefer either. If they install a "load shedding device" like the AESS, they can have more of these loads and more than 5 breakers on a 30 amp shore power system.
What is does is sense if the primary load is using significant current, and switches off the secondary to keep from overloading the single breaker. So when you turn on the microwave, it will drop the electric hot water heater and 45 seconds after the microwave goes off, the hot water heater goes back on! In general you would never know it is happening, but it keeps from overloading the 30 amp power feed. There is no reason to have such a device in a 50 amp power panel and shore power arrangement, so you probably have one if you have a 30 amp connection.
If you are a masochist, you can read for yourself at Page 70-479
Look at section "C".