NextEra (the energy company that recently bought HECO) is looking to do just this. A Sept. 2013 report by them estimates a capital cost of approximately $600 million for a 200 MW cable connect between Maui and Oahu. (source page 8 of [1])
This is the low end of the scale with other estimates ranging from $553 Million to $1.24 Billion (page 9).
Note that this does not connect the Big Island to the grid either.
The preliminary proposed route can be seen on page 84 of the report.
This is the low end of the scale with other estimates ranging from $553 Million to $1.24 Billion (page 9).
Note that this does not connect the Big Island to the grid either.
The preliminary proposed route can be seen on page 84 of the report.
[1] http://nexteraenergyhawaii.com/pdf/initial_comments.pdf