The company’s Managing Director, Sule Abdulaziz, made this known on Wednesday during a capacity-building workshop for power sector journalists in Keffi, Nasarawa State.
He was represented by the Executive Director of Transmission Service Provider, Oluwagbenga Ajiboye.
According to Abdulaziz, the debt includes ₦217 billion in legacy arrears and ₦240 billion accrued from more recent services rendered.
Despite the huge financial burden, he said TCN has managed to improve operational capacity, increasing its wheeling capacity to 8,701 megawatts.
