U.K.-based Gravitricity is planning to deploy its gravity-based energy storage solution at a decommissioned coal mine in Czechia. The project is part of a plan to commence a full-scale, 4-8 MW prototype scheme in a disused mine next year.

The record efficiency was obtained thanks to an interlayer placed between the electron-transporting layer and the perovskite layer, which eliminated the need for passivation. The cell was also able to retain around 90% of its initial efficiency after 500 hours under standard illumination.

The 210 mm module can reach a power output of up to 703.6 W and a power conversion efficiency of 23.08%. The result was confirmed by Germany’s TÜV SÜD.

Developed by Swedish manufacturer Azelio, the system stores renewable energy in recycled aluminium and has an electrical and thermal energy output, with a total efficiency of 90 %. One unit’s storage capacity reaches 165 kWh of electrical output and on top of that thermal energy between 55-65 degrees Celsius. Its modular configuration allows the deployment of projects with a capacity of up to 100 MW.

Singapore-based VFlowTech has secured funds to scale up manufacturing of its vanadium redox flow batteries. The company currently offers three modular products that can be scaled to multi-megawatt-hour systems.

Vietnamese manufacturer Irex has announced a new glass-glass solar panel with a power output of 265 W and a power conversion efficiency of 18.1%.

The system has dimensions of 834×417×1,766 mm and weighs 205 kg including the design panel. It achieves an electrical efficiency of 56% and can be connected with a hot water storage unit.

Dansk Solenergi ApS has developed a 13.6 kg tile that can be used for both new buildings and building renovation. The device is currently being produced in Denmark, where the company operates a 40 MW line.

A group of international researchers has observed how non-radiative charge recombination occurs in organic PV and claims to have identified a potential solution that could bring this solar tech closer to crystalline silicon in terms of power conversion efficiency.

Closed-loop pumped-hydro storage offers more chances to minimise environmental effects on water sources and overcomes the problem of finding suitable sites. According to an Australian research team, closed-loop systems could prevail on open-loop systems in the future and this trend is confirmed by another group of scientists from the United States.