A house with solar panels on its roof in Johannesburg. Picture: Michel Bega City Power says the conversion from prepaid to postpaid metering for customers with solar PV is a necessary operational and technical requirement. The power utility clarified details on Monday regarding the conversion of prepaid residential customers to the postpaid billing system.
Last week, the DA accused City Power of targeting Johannesburg residentswho have installed solar power on their houses. City Power announced that customers with solar installations who are currently on prepaid meters will also be converted to postpaid billing. “This measure is necessary to ensure accurate accounting of electricity imports and exports, improve network management, and align solar PV customers with the appropriate billing framework,” it said.
City Power spokesperson Isaac Mangena said prepaid meters are not designed to accurately measure two-way electricity or energy flows, which occur when customers generate energy and export excess power back into the grid. “This creates risks related to billing inaccuracies, revenue leakage, network instability, especially through reactive energy (pumping unregulated excess energy back into the grid), and safety concerns for our customers. “It robs customers of the benefits, including the revenue from selling excess power to City Power grid, and reduced Time-of-Use tariff, especially during peak periods,” Mangena said.
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Mangena said the measure is not intended to punish customers who have invested in embedded energy, especially solar energy, despite the DA accusing City Power of attempting a “power grab” against residents with solar. “We encourage it! On the contrary, it is aimed at creating a more efficient, fair and future-ready electricity system that can accommodate embedded energy generation by customers, while maintaining grid stability and affordability for all customers.
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