It is not surprising that a lot of grocery stores make use of a lot of energy the whole time that they are open. It is a well-known fact that groceries contain a lot of items. Some of these items can be accessed immediately. A lot of groceries make use of 52.5 kWh of electricity.
This is a lot but it will be worth it especially since it can keep a lot of the items in here safely. You do not want to purchase stale items simply because they are not as expensive as the fresh ones. The bigger the supermarket, the larger the amount that the owner has to pay for to sustain the electric bills.