"It was an opportunity that fits in terms of assets we understand - smallish hydro - and a regional type of customer base that we also understand really well," he said. "It all logically fits together."
The company will fund the acquisition of KCE from committed bank facilities.
Trustpower has to confirm its formal offer between 14 days and 30 days after the takeover notice was sent to KCE. There will then be a 90-day acceptance period.
"We've locked up Nova which takes us to 54 per cent," said Mr Hawksworth.
"Beyond that we have to see how the process plays out. In the structure of our offer, we would like to get as much of the base as possible, but we can't preempt the other shareholders' decisions."
Andrew Harvey Green, a senior equity analyst at Forsyth Barr, said the final outcome would depend on the smaller shareholders and the King Country Electric Power Trust.
"In the past the trust has been quoted as saying they're not particularly interested in selling. But they used to own the lines company, a chunk of which they sold, then redeployed into KCE, so I wouldn't completely rule out them selling."
Mr Harvey-Green said Trustpower was always the logical buyer for KCE in terms of the nature of the assets and the customer base.
"It fits quite nicely into the Trustpower portfolio. So the announcement is not a huge surprise."
King Country Energy results for nine months to December 31, 2014
EBITDAF*: $11.2 million
Net Profit After Tax: $3.8 million.
Employees: Approximately 46 mostly located in Taumarunui.
*EBITDAF = Earnings before interest, tax, depreciation, amortisation, change in fair value of financial instruments, impairments and equity accounted earnings.