An undersized generator acts in a similar way. It just won't be able to offer the electrical power needed to operate your house proficiently. The size of the generator will rely upon what you hope to operate in the course of a blackout. To help you estimate your usage, Here https://connerdkoru.blogsvirals.com/26673114/details-fiction-and-what-size-generator-is-needed-to-power-a-house