If there is a Home Depot nearby you can buy one of those Kill-A-Watt meters that plugs in to any 120 volt electrical outlet. They sell for about $20. With this you can monitor your exact voltage at any given time and take a photo of the voltage to give to the park owner.
One of the problems with low voltage is that it puts a strain on any motor, such as your AC compressor/fan. For them to function, they need to draw more amps than normal when the voltage is lower than normal. This means they will run hotter and can also trip any thermal sensors.
Your AC unit has it's own time-delay reset so any changes in your EMS delay will not affect the delay on your AC units.
