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China

Overcoming thermal issues of vanadium redox flow batteries

Chinese scientists have analysed 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.

World’s largest hydrogen airplane makes first flight

The hydrogen stream: ZeroAvia tested its new 19-seat hydrogen-powered aircraft, Chinese scientists unveiled new tech to promote bubble removal in electrolysers, and Egypt-Japan University of Science and Technology researchers claimed that the most efficient hydrogen production systems are based on waste heat.

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China mulling restrictions on polysilicon, wafer exports

The Chinese government is considering the introduction of export restrictions on solar wafers, black silicon, and silicon casting equipment. It has launched a public consultation process on the proposed measures.

Green hydrogen straight from the ocean: Adelaide researchers crack new method

Researchers from the University of Adelaide, along with international partners, have successfully used seawater with no pre-treatment to produce green hydrogen. The team did this by introducing an acid layer over the catalysts in situ. “We have split natural seawater into oxygen and hydrogen with nearly 100% efficiency… using a non-precious and cheap catalyst in a commercial electrolyser,” University of Adelaide’s Professor Shizhang Qiao said.

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Weekend read: Shining a light on supply chains

The drivers for PV supply-chain traceability could rub against a solar industry enjoying a true seller’s market, with demand outstripping supply. However, supply-chain auditing services are gaining support in increasingly regulated environments. pv magazine’s Tristan Rayner has spoken to a number of auditing experts about how they shine a light on often-opaque operations.

New residential battery inverter solution from China

Esysunhome (ESYSH), a new energy storage company in China, has developed a 5.12 kWh lithium iron phosphate (LFP) battery system with a 7.9 kW inverter. It says six modules can be combined for up to 30.72 kWh of energy storage capacity.

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JA Solar to build new vertically integrated solar factory in China

JA Solar says it will build a new manufacturing facility in Inner Mongolia, China. The plant will produce everything from polysilicon to solar panels.

Longi plans new 100 GW wafer plant, 50 GW solar cell factory in China

Longi Solar said it will invest CNY 42.5 billion ($9.4 billion) in 100 GW of wafer capacity and 50 GW of solar cell capacity in Shaanxi province, China.

Hoymiles reveals microinverters for high-power PV modules

Chinese manufacturer Hoymiles has developed a new line of microinverters with up to 96.7% efficiency and outputs of up to 2,000 VA. It said they can be connected with up to four high-power solar modules.

Trina Solar starts producing 210 mm n-type TOPCon solar cells

Trina Solar says its industrial tunnel-oxide passivated contact (i-TOPCon) solar cells, based on 210 mm wafers, have started rolling off the production line at its 8 GW factory in China. It will use the n-type cells to produce its new Vertex N modules, with power outputs ranging up to 605 W, and an efficiency rating of 22.4%.

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