Solar module price increases to affect returns on 4.4 GW of Indian solar
Solar cell and module prices have increased by more than 40% over the last 18 months in India, driven by polysilicon prices. However, bid tariffs have remained lower than what is needed to mitigate the rise in PV module prices. The risk of lower returns is significant for 4.4 GW of projects that have been awarded over the past 18 months, with tariffs below INR 2.2 ($0.028)/kWh.
ROTH: US Customs detained solar module shipments under law on forced labor
US Customs and Border Patrol has detained a large shipment of quartzite, a raw material for making polysilicon, from an unnamed Tier 1 solar module supplier.
Semi-transparent perovskite solar cell for window applications
Buildings, particularly those with glass facades, are getting closer to self-powering, according to Australian scientists who recently developed a 15.5%-efficient, semi-transparent solar cell that allows more than 20% of visible light to pass through.
Solar-powered residential heating system based on storage heaters
Spanish heating specialist Elnur Gabarron offers a residential heating system that works with surplus solar power and storage heaters. The system can work as a backup solution, combined with existing conventional heating, or as a household’s main heating system, with minimal use of grid electricity.
Perovskite-silicon tandem solar cell with TOPCon structure hits 27.6% efficiency
A research group led by Chinese manufacturer JinkoSolar has developed a tandem perovskite-silicon cell with a subcell based on TOPCon tech. The group succeeded in reducing voltage losses in the silicon sub-cell by minimizing the shunting probability during device fabrication.
Taiwan maintains FIT rates for rooftop PV
The Taiwanese authorities have decided not to reduce feed-in tariffs for PV, as initially planned, in order to support more solar deployment. The country added around 1.9 GW of new solar capacity last year.
Mitsubishi Electric unveils power-switching transistor for solar
Mitsubishi Electric’s new 2.0kV LV100 semiconductor device is based on its insulated-gate bipolar transistor (IGBT) technology and Relaxed Field of Cathode (RFC) diodes. It is designed for industrial applications that need “middle-ground” power converters between DC1500 V and 3.3 kV.
Storing solar power via borehole thermal energy storage
A Chinese-Finnish research group has proposed the use of seasonal, soil-based thermal energy storage in combination with photovoltaics in residential districts. They have found that the hybrid concept could cover up to 58% of total heating demand.
California ruling simplifies grid-connection process for distributed solar, storage
The California Public Utilities Commission has introduced a new rule to streamline the interconnection process for distributed energy resources.
Perovskite-CIS tandem solar cell with 24.9% efficiency
A Dutch-German research team has developed a new PV cell with a certified efficiency of 23.5%, an open-circuit voltage of 1.59 V, a short-circuit current of 19.4 mA cm–2, and a fill factor of 75.5%. It reached maximum efficiency of up to 24.9%, due to the high quality of the subcells.
