Utility Scale Storage

The unfolding effects of the Covid-19 crisis, and fears of a possible second wave, have split analysts trying to guess how the unsubsidized renewables market will emerge as slumping demand continued to distort power markets. pv magazine rounds up the week’s coronavirus developments.

Matt Harper, chief commercial officer of newly-merged British-Canadian vanadium redox flow battery business Invinity Energy Systems has spoken to pv magazine about the VS3-022 Battery Unit it is marketing for grid scale solar-plus-storage projects and why it may be a better bet than lithium-ion.

Researchers at the Queensland University of Technology have proposed a new design for a diamond nanothread bundle that could pave the way for a new form of mechanical storage. Pound-for-pound, the tech could be three times more powerful than lithium-ion batteries.

The Australian Renewable Energy Agency says that on-site solar electrolysis is not just the most cost-effective way of developing a domestic and export hydrogen economy, but perhaps the only way.

German company GP Joule wants to build hydrogen transport infrastructure in North Friesland. The electricity generated by five wind farms in the region will be converted to green hydrogen to be delivered to filling stations in Husum and Niebüll and used by two fuel-cell buses and five cars.

The coronavirus epidemic continues to batter the global economy, including the solar industry, but falling demand during lockdowns has brought negative energy prices as well as helping drive record solar generation, amid less-polluted skies.

Scientists in the United States have used microwaves to convert ubiquitous plastic packaging material polyethylene terephthalate into a battery electrode component. The researchers say anodes based on the material could be suitable for both lithium-ion and sodium-ion devices.

Indian scientists have developed a low-cost electrocatalyst based on iron, manganese and N-doped carbon derived from fish gills (Fe/Mn/N-FGC) to increase the performance of a homemade rechargeable zinc-air battery. The Fe/Mn/N-FGC cathode-based battery achieved open-circuit voltage of 1.41 V and a large power density of 220 mW/cm2 at 260 mA/cm2 current density – compared to 1.40 V and 158 mW/cm2 for a commercial platinum/carbon-based battery – with almost stable charge-discharge voltage plateaus at high current density.

The project was selected in a tender for storage deployment in non mainland grid interconnected areas that was finalized by France’s Energy Regulatory Commission in 2016.

A thinktank has studied whether increased solar energy would contribute significantly to reducing the carbon footprint of the French and European electricity systems in an attempt to respond to a common French refrain the nation needs no further decarbonization of energy because it has nuclear power.