In hot weather the electrical system in an RV park is stresses with everyone running the A/C. Check your voltage inside the RV with the A/C running. You should have a minimum of 108 volts. The newer A/C units won't hardly run below 108 volts.
To help your power in the trailer, put the frig and water heater of gas, not electric.
Ken
Amateur Radio Operator.
2023 Cougar 22MLS, toted with a 2022, F150, 3.5L EcoBoost, Crewcab, Max Tow, FORMER Full Time RVer. Travel with a standard schnauzer and a Timneh African Gray parrot