1. In Search for Cheaper, Longer Energy Storage, Mountain Gravity Could Eventually Top Lithium-Ion

    In Search for Cheaper, Longer Energy Storage, Mountain Gravity Could Eventually Top Lithium-Ion

    Mountain gravity energy storage could be a viable way to store electricity for longer durations and at larger scales than lithium-ion battery storage can, according to a study recently published in the academic journal Energy. The idea of gravity as a form of storage is an example of ongoing research into additional storage options beyond lithium-ion batteries. Despite large cost reductions over the past several years, some experts still view lithium-ion systems as not economically-efficient enough at scale to fully back up the amount of renewable energy expected to come onto the grid due to states’ long-term clean energy goals.

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  1. Quotes

    1. High-renewables grids, as mandated by many states, will require extremely long durations of storage, potentially on the order of 10-20 hours to shift variable solar power to cover nights and cloudy days, and weeks or even months to shift energy from high-wind months to lower-wind periods.
    2. Additionally, [pumped hydro] plants are limited to a height difference of 1,200 meters, due to very high hydraulic pressures. MGES plants could have height differences of more than 5,000 meters.
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