Commercial applications require the finest of all generators for all situations, particularly for any application which might have emergency status at any time. Backup generators for commercial applications are much like home generators, but also of better quality, larger, and often far more powerful. A homeowner would do well to learn about commercial generators should he want to cover all the most important bases prior to purchasing a home emergency unit, but a business owner must know the field prior to a major investment of this sort. backup generator