HONOLULU (AP) Hawaii's energy administrator says connecting Maui and Oahu's electrical grids using an undersea cable would save consumers more than $420 million over several decades. Administrator Mark Glick told the Public Utilities Commission at a meeting on Oahu Tuesday linking the grids would increase the amount of renewable energy that could be tapped. The Honolulu Star-Advertiser reported Glick said the cable would also allow the Oahu and Maui grids to operate more efficiently. The commission is gathering public comment as part of its investigation into whether an undersea cable would be in the public interest. The commission has scheduled a similar meeting on Maui for today. The proposed cable would allow a two-way flow of power between Oahu and Maui from both renewable and traditional sources of energy.