A solar plus pumped hydro storage project proposed by the Kauai Island Utility Cooperative could produce a quarter of the island’s energy requirements.

HECO says a proposed massive energy storage facility on Oahu will help fill the capacity gap left by the closure of a 180-MW AES coal-fired plant.

The shutdown of the AES Hawaii Power Plant in 2022 could leave Oahu's energy grid with a 180-MW generation deficit.