U.S. startup unveils zinc-polyiodid redox flow battery with energy density of 320 Wh/L
BESSt announced that its new redox flow battery technology delivers 20 times the energy density of conventional vanadium flow storage systems. The battery is based on a zinc–polyiodide redox flow chemistry developed by the Pacific Northwest National Laboratory.
Peak Energy announces operation of first large-scale sodium ion battery in US
Denver-based Peak Energy claims its sodium-ion battery system offers the lowest operating cost of any energy storage technology on the market today.
Scientists report experimental breach of Shockley-Queisser efficiency limit for silicon solar cell
A Chinese-US research group claims to have achieved a power conversion efficiency of over 50% in an n-type single-junction solar cell by inhibiting light conversion to heat at extremely low temperatures. The result was achieved at temperatures of 30-50 Kelvin, which are a few tens of degrees above absolute zero.
Qcells secures release of detained South Korean solar cells for US factories
US Customs has released Qcells’ South Korean solar cell imports for its Georgia factories after detaining them under the Uyghur Forced Labor Prevention Act (UFLPA).
Mexico launches tender for 300 MW solar plant
Mexican state-owned utility Comisión Federal de Electricidad (CFE) is seeking proposals for the Puerto Peñasco Secuencia III solar plant, which will also include 103 MW of battery capacity.
REC leads US residential solar panels as Tesla loses storage share
REC led the US residential solar panel market in the first half of 2025, while Tesla lost share in home batteries and inverters amid supply and policy pressures, according to EnergySage.
Boviet Solar to expand to 3 GW of annual US module production capacity
Announcements from Vietnamese solar manufacturing company show its progress towards 3 gigawatts of capacity in each solar module assembly and cell fabrication
Solar, storage push US tax credit market near $60 billion in 2025
Crux’s mid-year report says the US transferable clean energy tax credit market is on track to approach $60 billion in 2025, nearly double last year, led by solar and storage.
Arbitrage remains leading use case for US grid-scale batteries
Arbitrage has remained the dominant use case for utility-scale batteries in the United States through 2024. However, the share of the cumulative fleet reporting it as their primary application has stayed roughly the same percentage-wise.
How rooftop solar can complicate residential real estate transactions
Many homeowners assume leased or loaned solar systems will boost their home’s value, but outstanding loans often drag down equity instead.
