The reduction in surplus is due to the fall of line charge prices in accordance with the Allowable Notional Revenue levels set by the Commerce Commission, partially offset by lower operating expenses and finance costs, the report says. A change in accounting treatment of Southern Generation Limited Partnership Power Purchase Agreement resulted in the restatement and decrease of 2020 Share of Profit of Associates and Joint Ventures by $2.45m. Throughout the year, EIL’s total capital investment was $4.3 million, and a further $1.6 million was spent on maintenance. Among the work underway is a 23MVA single transformer substation, near Elizabeth Park in Invercargill, which is in the process of being seismically strengthened and upgraded to a dual transformer substation to cater for forecasted electricity load increases and to provide a more resilient supply.