Soaring electricity costs – driven by municipal tariffs Nersa now admits were unlawfully approved – are threatening the competitiveness and sustainability of Nelson Mandela Bay’s manufacturing sector.…. Enter your email below and we'll send you a one-time pin to log in. {JSON.stringify(article.attachments[0], null, 2)} --> Soaring electricity costs – driven by municipal tariffs Nersa now admits were unlawfully approved – are threatening the competitiveness and sustainability of Nelson Mandela Bay’s manufacturing sector.