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How much polysilicon is enough

TU Delft researchers have proposed a new approach for solar cell manufacturing that implies gauging wafer thickness depending on the regions where the cells and modules will be deployed. They also suggested to adopt test conditions that are representative of the outdoor working condition of solar cells in an alternative to standard testing conditions.

New research shows laser-assisted firing improves TOPCon solar cell reliability

Chinese manufacturer Jolywood is currently applying a laser-assisted firing process in TOPCon solar cell manufacturing that can reportedly increase contact quality and corrosion resistance, while also reducing production costs. Scientists at the University of South Wales have investigated the impact of this production process on the quality of TOPCon cells and have found it “significantly” improve their reliability.

Perovskite-perovskite tandem solar cell based on tin-lead top device achieves 28.20% efficiency

Developed by a research group in China, the two-terminal all-perovskite tandem device utilizes a 23.11%-efficient single-junction top cell relying on an optimized Sn-Pb perovskite material. The perovskite-perovskite cell was also able to retain 95.7% of the initial efficiency after being stored in a glovebox for 2,200 h.

EU launches anti-subsidy investigation against Longi, Shanghai Electric

The European authorities are trying to determine whether two consortia – including subsidiaries of Longi and Shanghai Electric – violated the new EU rules on foreign subsidies when they participated in a procurement process in Romania for a 110 MW solar farm. The European Commission is expected to make a final decision within 110 working days.

Huawei debuts all-in-one storage solution for residential PV

Huawei says its new, all-in-one storage solution for residential PV comes in three versions with one, two, or three battery modules, offering 6.9 kWh to 20.7 kWh of usable energy. The the Luna2000-7/14/21-S1 system also includes an inverter, an optimizer, and an energy management system.

European consortium wins 100 MW PV tender in Kosovo with $0.0524/kWh bid

A group led by Swiss construction group Orllati has won a 100 MW PV tender in Kosovo with a bid of €0.0488 ($0.0524)/kWh. The consortium has secured a lease for up to 30 years, supported by a 15-year power purchase agreement (PPA) with Kostt, the national market operator in Kosovo.

New design for organic/CIGS tandem solar cells promises 27.46% efficiency

Scientists in the Middle East designed a flexible two-terminal organic/CIGS tandem solar cell for wearable applications. The device achieved an open-circuit voltage of 1.89 V, a short-circuit current density of 17.55 mA/cm2, and a fill factor of 82.79%.

Thornova launches 720 W TOPCon solar panel with 23.2% efficiency

US-based Thornova said its new panel features a power conversion efficiency spanning from 22.4% to 23.2% and a temperature coefficient of -0.29% per C. The company is a subsidiary of China-based manufacturer Sunova Solar and is currently planning a cell and module factory at an unspecified location in the United States.

Inverter undersizing not universally effective to reduce soiling losses

An international research team explained that, although inverter clipping is initially effective in mitigating soiling losses, these losses could become more visible with time, as solar module degradation makes clipping less frequent. They also warned that inverter undersizing alone may not be enough to mitigate soiling losses and suggested cleaning as an additional way to reduce them.

Turkey introduces duties on PV module imports from 5 countries

The Turkish government has decided to impose a tariff of $25 per square meter on solar modules imported from Vietnam, Malaysia, Thailand, Croatia, and Jordan.