A 7500-watt generator is more than enough to run a house, It can supply power to almost all of your house. You can run the lights of many rooms and even run many heavy appliances. You can run your air conditioner over the generator which normally needs almost 3800-6200 watts of power whereas if you want to use the heating feature you will need 5000 watts of power. You can even run the refrigerator on the generator which requires just 700-750 watts of power. Many common appliances which we use at home usually just need 1000 watts. But if you want to run all the appliances of the house at the same time you will require a more than 7500 watts generator.