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Whole-Home Backup Generators How big of a generator do I need to run my whole house?

While the size of your home’s backup generator will depend on your specific electrical needs, a generator rated at 5,000-7,500 watts is a good starting point. This is enough to run all of your essential household equipment, including a well pump, refrigerator and freezer and lights. Contact Arnold Electrical to get an estimate for the best size generator for you.
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