About Sh2 billion of the debt is owed by customers in Nairobi, while those at the Coast Region owe Sh845.7 million.
North Eastern Kenya customers have not paid Sh620.8 million.
Most of the debt dates back from earlier years up to the month of December.
Kenya Power is seeking debt collectors to help recover outstanding bills of Sh5 billion from customers who have been disconnected from the grid.
The move is part of the electricity distribution new strategy to net defaulters and root out electricity thieves using illegal connections to the national grid to deprive the company of revenue as it seeks to lift itself out of a deep earnings slump