Your business must have an approved electricity meter. This meter tracks electricity usage regularly to facilitate time-of-use billing. Discovery Green integrates with these meters to retrieve details of your electricity use.
Time-of-use is a classification to account for the hour of the day, the day of the month and the season of the year when a kilowatt hour of electricity is produced and used. A 24-hour period is divided into three time-of-use periods: Peak, Standard and Off-peak.
Peak periods refer to hours of the day when the demand on the national grid is at its highest, usually in the morning and evening. Eskom charges higher tariffs during Peak hours to encourage lower use. Time-of-use tariffs are higher during the winter months of June, July and August compared to the remaining months of the year.
To have a kilowatt hour of electricity you've used successfully credited against a kilowatt hour of electricity produced, both must be produced and used in the same time of use period in a calendar month. For example, a kilowatt hour of electricity supplied by Eskom that is used during Peak times in January can only be offset with a kilowatt hour of renewable electricity if the renewable electricity is produced during Peak times in January. This means a kilowatt hour of renewable electricity produced during Off peak times cannot be credited against a kilowatt hour of electricity consumed during Peak times, or against a kilowatt-hour consumed during Off-peak times in another month.
Time of use tracking enables Discovery Green to accurately measure and then reconcile the renewable electricity produced to what is consumed, which results in a saving to your business. This saving shows differently depending on the wheeling framework that is in place where your business operates. Under traditional wheeling of power, the saving reflects as a credit on your Eskom bill.