I want to hire an electrician to set up my house so that I can just plug it in to my house when the power goes out. What additional things do I need to buy that the electrician will need? Here is my generator - Westinghouse 12500 Watt Dual Fuel Home Backup Portable Generator, Remote Electric Start, Transfer Switch Ready, Gas and Propane Powered, CARB Compliant https://a.co/d/gSlgcUv Also, what can I expect to be able to run on a generator of this size? I definitely want my refrigerator, and preferably my central heat and air conditioning (air conditioning will not...