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Storing wind, solar power with silica sands

NREL researchers developed a system that uses heated silica particles for thermal energy storage. The baseline technology is designed for a storage capacity of up to 26,000 MWh and is claimed to have a cost of of between $2 and $4 per kWh.

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Lithium-ion vs lead-acid 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.

Reliance Industries may acquire REC Solar

Mumbai-based Reliance Industries and REC Solar have declined to comment on rumors that the Indian company might acquire the Norwegian PV module maker, in a potential transaction that Indian media outlets have already valued at $1 billion to $1.2 billion.

Photovoltaic sunshade based on perovskite solar cells

The phovoltaic sunshade was deployed on the facade of a factory owned by Polish aluminum system provider Aliplast. The movement of the PV blinds is regulated by a controlling system linked to a weather station installed on the roof.

Cheapest long-duration storage for systems with high renewables

National Renewable Energy Laboratory researchers have studied which tech offers the lowest levelized cost of energy to provide the US Western Interconnection grid with electricity when wind and solar are not available. They assumed 85% renewables penetration and determined that geologic hydrogen storage and natural gas combined-cycle plants with carbon capture storage are the cheapest options for 120-hour discharge applications. 


JinkoSolar unveils details of its TopCon 620W bifacial solar panel

The Tiger Neo panel has a power conversion efficiency of up to 22.1% and a temperature coefficient of -0.30% per Celsius degree. The product is made with 182mm wafers, half-cut cells, and has a power output ranging from 590 to 620 W.

Combining big floating solar with hydropower

Scientists in Bangladesh have evaluated how a 50 MW floating PV plant could be integrated with the 230 MW Karnafuli Hydroelectric Power Station, located at the Kaptai Dam on the Karnaphuli River. They found that the two energy sources can be perfectly optimized and that PV can compensate for the reservoir’s shortage of water storage during the winter season while hydropower can compensate for the poor yields of the floating array during the monsoon season.

Growatt unveils off-grid inverter

The 3 kW inverter has an efficiency of 95% and features a surge power of 9000 VA. According to the manufacturer, the device is compatible with mainstream lead-acid and lithium-ion batteries.

Redox flow battery retains more than 90% of capacity over 6,000 cycles via new catholyte

The battery was built with a new catholyte and a symmetry-breaking strategy, which consists of changing the symmetry of the redox-active organic molecules instead of using the common approach of attaching a hydrophilic functional group.

Blockchain for PV module recycling

Next Energy and Marubeni are developing a blockchain tech for PV module inspection – with the support of the Japanese government – which they claim is able to provide data on a panel’s traceability and components as well as verifying that the data were not modified or tampered with.

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