Unlike residential use as a business it is likely that most of your energy use will be during the day. This is the perfect time to use solar for equipment like air conditioners and fridges where you are not relying on batteries for your power, but taking the charge directly from the sun.
As a back up you will be connected to the electricity grid so if there is a problem or you are open in the evening you will always have electricity. If there is a power cut at night then you will still have lights, fans, tills and computers so you can keep working.
This will still save you a considerable amount of money on your electricity bill, or maybe let you buy that air conditioning unit for your office you thought would be too expensive to run.
