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There were two recent announcements relating to the installation of battery and electrolyzer technologies that broke world records:
1. Proton Onsite / Nel ASA just announced a contract to supply a PEM-electrolyzer based H2 generation and fueling station that will supply up to 900 kg per day of H2 that will be used for fuel in H2 fuel cell buses in the Palm Springs area of California. The size of this combined electrolyzer / fueling station makes it the largest such station in the world. For perspective, 1 kg of H2 is roughly equivalent to 1 gallon of gasoline, and an average convenience store gas station in the U.S. sells about 4,000 gallons of gasoline per day. So, it will be desirable to make these systems even bigger in the future. You can read more about the Nel ASA fueling station here.
2. Tesla is half way finished building a Li-ion battery system that will be installed in Southern Australia. Once installed, this system will be rated at 100 MW with 129 MWh of capacity, making it the largest grid-tied battery system in the world. For perspective, a typical coal-fired power plant produces around 1000 MW of electricity. You can read more about the Tesla installation in Australia here.
Both California and Australia have been aggressive installing renewable wind and solar, which has resulted in large price fluctuations in both locations, leading at times in negative electricity prices. Using these free or low-cost electrons to to produce fuels or charge up a battery until electricity prices return to normal represent a huge opportunity for these energy storage technologies to grow.
Esposito Research Group Blog 