Utility Scale Storage

Elsewhere, Uniper and the Port of Rotterdam have signed a deal to produce green hydrogen at the former’s site on the Maasvlakte extension of the port, and the Japanese government is helping Azerbaijan develop a green hydrogen and ammonia market.

A group of biologists in the United States working with a bacteria discovered a mechanism that could be used to convert electricity into biofuels or other useful substances. With better understanding of the genetics, the group says the mechanism could rival hydrogen for the storage of renewable energy.

Developed by Australian scientists, the demonstrated system is claimed to achieve a solar-to-hydrogen efficiency of 20% at a levelized cost of hydrogen (LCOH) of $4.10/kg. The direct solar hydrogen generation technology is powered by a tandem perovskite-silicon solar cell with an unprecedented high open-circuit voltage of 1.271 V, and a power conversion efficiency of 24.3%.

For developers and investors who are ready to start talking about solar+storage projects, there are some interesting and not so straightforward decisions to be made on the sizing of assets. Siobhán Green, lead on battery storage in continental Europe for Everoze, looks at the different approaches to sizing and how to choose between them. In particular, she assesses the ‘lifetime’ factors to dimensioning and discusses how to plan for degradation and potential through-life resets to the revenue stack.

Moreover, two big Russian corporations have unveiled plans to produce hydrogen and Portuguese utility EDP said it wants to set up a a pilot project for a green hydrogen plant in Brazil.

The Desert Quartzite Solar+Storage Project is in Riverside County, California, and could enter service in early 2024.

US scientists claim to have created a crossover-free, high-voltage, non-aqueous hybrid flow battery with a novel chemistry for the solid sodium anode. The device has shown a high working voltage of around 2.6 V and a coulombic efficiency of 95.0%.

The suitability of vanadium redox flow battery technology for Australian residential and commercial applications will soon be tested, as Perth-based storage specialist VSUN Energy plans to deploy three 5 kW/30 kWh flow batteries.

An international research team has conducted a techno-economical comparison between lithium-ion and lead-acid batteries for stationary energy storage and has found the former has a lower LCOE and net present cost. Through their analysis, which was performed assuming the use of the batteries in connection with a 10 kW, grid-tied PV system, the scientists concluded that lithium-ion batteries are the most viable solution.

The storage project is linked to a 1 GW wind and solar project portfolio, 500 MW of solar distributed generation, and the construction of a gigafactory for vanadium redox flow batteries in China.