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Technology and R&D

TOPCon shingle solar cell achieves 22.0% efficiency via thermal laser separation

Scientists from Germany’s Fraunhofer ISE and US panel maker Solaria have applied thermal laser separation and post-metallization passivated edge technology to tunnel oxide passivated contact (TOPCon) cell production. They have developed shingle PV devices that are more efficient than cells built with conventional laser scribing and mechanical cleaving methods.

New thermal battery offers fast, efficient performance at low cost

US engineers have built a scalable thermal energy storage prototype system that combines the best latent and sensible heat transfers. The technology, which is now market-ready after three years of testing, consists of engineered cementitious materials and thermosiphons in a combination that enables fast, efficient thermal performance at low cost.


Perovskite-CIGS tandem solar cell design promises 29.7% efficiency

A numerical study by researchers at India’s Chitkara University shows enhanced performance in the top device of a tandem solar cell based on copper indium gallium selenide (CIGS). The design had a higher open-circuit voltage, with the top cell acting as a current-limiting cell.

Replacing MPPT with direct PV-battery coupling

Researchers in Germany have assessed direct coupling and integration between PV and batteries at the scale of a single PV module. They say their solution could be cheaper and provide superior performance than maximum power point tracking (MPPT) in optimizing PV system performance.

Photovoltaic-thermoelectric tech with potential efficiency of 65%

Chinese scientists have simulated a new photovoltaic-thermoelectric technology, based on radiative cooling and III-V solar cells, to generate electricity at night.


Photovoltaic-thermal module based on biochar-PCM achieves 79.6% efficiency

Indian scientists have developed a panel with an electrical efficiency of 13% and and thermal efficiency of 66.6 %. They built the system with a 100 W PV panel, a rectangular absorber, and a cooling technique based on a phase change material (PCM) that uses biochar derived from water hyacinth.

Emmvee gets Fraunhofer ISE on board for solar cell line

India’s Emmvee Group has appointed Germany’s Fraunhofer Institute for Solar Energy as the technology partner for its upcoming 1.5 GW PV cell manufacturing facility.


New EV battery offers 50% more density than traditional lithium-ion batteries

Ionblox says it will use $32 million of series B funding to support the buildout of a novel silicon anode electric vehicle battery.

IIT-Madras Research Park signs thin-film R&D MoU with First Solar

IIT Madras Research Park and US-based First Solar will cooperate on a range of research and development (R&D) activities including the localization of thin film and other next-generation PV technology supply chains in India, high-volume manufacturing, PV module testing, and high-value recycling.


Survey shows 34.3% failure rate for residential inverters over 15 years

The Bern University of Applied Sciences in Switzerland has published the initial results of a survey on the durability and performance of residential PV inverters and power optimizers over a 15-year period. They found that more than 65% of the inverters did not present yield-relevant faults by their 15th year of operation.

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