Enerpoly produces low-cost, low-maintenance zinc-ion battery storage systems for durations of two to 10 hours. The Swedish battery specialist now plans to develop prototypes of a residential plug-in storage system with rechargeable zinc batteries in Europe, under an EU-funded collaborative project with Austrian startup EET.

Scotland’s Gravitricity is developing gravity-based storage facilities in former mine shafts to stabilize electricity networks at 50 Hz, by responding to full power demand in less than a second. CEO Charlie Blair speaks to pv magazine about the potential and limitations of the tech, and how it compares to lithium-ion battery storage.

Poland’s Unimot Group is expanding its production line for Avia Solar monocrystalline PV modules due to growing demand for products made in Europe.

US residential solar specialist Sunnova is seeking approval from the California Public Utilities Commission (CPUC) for its micro-utility business model, which could potentially disrupt the state’s energy landscape. pv magazine speaks to CEO John Berger about plans to develop self-sustaining microgrids by equipping new homes and communities with solar and storage.

Chinese scientists have analyzed reports of thermal issues with vanadium redox flow batteries (VRFB) and existing thermal management methods. They say the operating temperature should be maintained in the range of 10 C to 40 C to ensure VRFBs with high efficiency, weak side reactions, high electrolyte stability, and low crossover.

Low participation rates for vehicle-to-grid (V2G) tech of just 12% to 43% are needed to provide short-term grid storage demand throughout the world by as early as 2030, according to a group of Dutch and US researchers.

Indian researchers have presented a new way to develop effective electrode materials for superpower redox flow battery (RFB) systems. Their flow cell with heat-treated nickel-rich platinum-nickel coating on the graphite felt delivered an impressive ever-best power density of around 1,550 mW cm−2.

Once a European leader in PV deployment, the solar market in Czechia has slumbered for the last decade. Now, with growing public support and financing in place, momentum is building and a gigawatt-scale pipeline is taking shape. However, fresh challenges loom, as Marija Maisch reports.

Edinburgh-based energy storage solutions specialist StorTera has developed a long-duration, energy-dense, lithium-sulfur-based single liquid flow battery (SLIQ). The tech is said to last for 30 years with minimal degradation.

Robert Piconi, CEO of gravity storage specialist Energy Vault, makes the case for the US company’s long-duration energy storage solutions as an alternative to lithium-ion batteries, and discusses the ideal project size from an economic perspective.