Hawaii is in an excellent position to try out the full range of storage technologies and discover which work best for them.
They have underground cavities that used to be full of lava, for compressed air, hydrogen storage, or pumped hydro. They have mountains pumped-hydro reservoirs would be easy to build on. They have deep ocean trenches just offshore for undersea compressed air and buoyancy.
Choices for renewable generation include not just solar and wind, but also undersea currents and wave air pumping.
They have underground cavities that used to be full of lava, for compressed air, hydrogen storage, or pumped hydro. They have mountains pumped-hydro reservoirs would be easy to build on. They have deep ocean trenches just offshore for undersea compressed air and buoyancy.
Choices for renewable generation include not just solar and wind, but also undersea currents and wave air pumping.