If you have any premises you'll be billed every quarter for any electricity (and perhaps gas) you've used in the business.
Until you have been trading for a few months you won't know exactly how much - if any - energy the business will use. However, you could contact energy suppliers who may be able to give you an idea of likely consumption. You can adjust your estimated figures once you have been in business for a few months.
If you think your business will be an energy consumer then it can be well worth shopping around to see which suppliers would be the cheapest.
Energy prices are high and seem very likely to keep on rising in future, so it makes good sense to include efficiency measures when you fit out and equip any business premises.