The national grid operator Transpower has apologised for its shortcomings that led to widespread power blackouts in August, RNZ reveals. The blackouts occurred on the evening where New Zealand saw its highest electricity demand ever, Transpower said. It admitted operational procedures, communication and error in demand allocation exacerbated the issue, resulting in additional households losing electricity for a short period of time. “New Zealand has not experienced an event like this since 1992 and it is our intention to avoid a repeat,” chief executive Alison Andrew said.