The size of the generator needed to power a house depends on the power needs of the house. Some homes may require more power usage and appliances during a power outage, while others may only need a few running. To determine the best generator size for home use, you should refer to the list of appliances and systems you want to power and select the wattage needed for each. Once you have those, add the numbers together to figure out what size generator would be right for you. The more appliances you want to use, the bigger generator you will need. In general, a generator that can provide between 5,000 and 8,000 watts would be enough to power a typical house, including essential appliances such as the air conditioner, sump pump, refrigerator, laptop, TV, and light bulbs. However, the size of the generator needed for a whole-home backup depends on the daily energy usage of the house and the backup power requirements, but between 20,000 and 30,000 watts should be enough for most homes. It is important to get the right size of the generator to ensure that your investment will pay off, as generators can last long with proper maintenance. It also ensures your safety by preventing short circuits and fires and protecting your appliances from damage. The right size generator for your house can also help keep you and your family comfortable during a power outage, avoiding heat stroke and other health hazards. Consulting a trusted electrician before purchasing a generator is always recommended to ensure the proper size generator is chosen for the specific needs of your household.