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Storing renewables in depleted oil and gas wells

US researchers have proposed the use of hydraulically fractured oil and gas wells to store renewable energy via compressed natural gas, with the levelized cost of storage potentially coming in at $70/MWh and $270/MWh. They said wells could also be used to store other renewable gases such as carbon dioxide or hydrogen in the future.

Designs, control strategies for PV-integrated shading devices

Photovoltaic shades in buildings offer energy efficiency and electricity generation, but an international research group says their commercial viability will depend on the control strategies used to optimize performance.

Aluminum-nickel molten salt battery for seasonal renewables storage

US scientists have developed a battery that can retain 92% of its initial capacity over periods of 12 weeks, with a theoretical energy density of 260 W/hour per kg. It was built with an aluminum anode and a nickel cathode, immersed in molten-salt electrolyte.

SMA unveils new inverter for residential, commercial PV

SMA is offering a new line of four inverters with power ratings of 12kW, 15kW, 20kW and 25kW, for use in rooftop PV systems up to 135kW in size. It claims the inverters provide grid-compliant power control of entire systems and enable over-dimensioning of PV arrays by up to 150%.

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Ukraine invasion reshaping discussion about energy, pricing, renewables

Indra Overland, the head of the Center for Energy Research at the Norwegian Institute for International Affairs, tells pv magazine how the Ukraine war is irreversibly changing the global energy landscape, making massive renewables deployment a certainty. But labor issues, equipment shortages, and reliance on Chinese manufacturing remain obstacles.

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Longi achieves 25.47% efficiency for gallium-doped p-type heterojunction solar cell

The result, confirmed by Germany’s Institute for Solar Energy Research Hamelin (ISFH), was achieved on a heterojunction solar cell based on an M6 wafer.

Semi-transparent organic photovoltaic filters for agrivoltaic greenhouses

Researchers in the United States have tested organic photovoltaic filters in a greenhouse hosting lettuce growth and have found the devices’ transmission spectra may help fine-tune the characteristics of the plant. They used transcriptomic analysis to assess the key modifications of the plants grown under the solar filters.

Canadian Solar launches 420W rooftop solar module with 21.5% efficiency

The new product is part of the company’s HiKu6 series based on 182mm wafers. Its temperature coefficient is 0.34% and its electrical characteristics are claimed to be compatible with the most common photovoltaic inverters thanks to values below 14A.

MIT scientists develop PV cleaning system based on electrostatic repulsion

Scientists from the Massachusetts Institute of Technology have developed a system that can be operated at a voltage of around 12V, with a 95% recovery rate for lost power after cleaning. The waterless system can be operated automatically via an electric motor.

Rocket Lab unveils space solar cell with 33.3% efficiency

The new device is based on an inverted metamorphic multi-junction (IMM) cell technology developed by Rocket Lab’s unit Solaero. The cell can be used in applications in the civil, military, and commercial space markets.

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