Technology and R&D

Dismissed by many in the solar industry as an overly-complex, outdated technology, concentrated solar power (CSP) is set for a comeback thanks to a scaled-down, modular approach.

Sud Renovables has installed a pilot vertical rooftop PV system on one of its facilities in Barcelona, Spain. The array features two 500 W bifacial modules from US-based SunPower and two microinverters from Enphase Energy.

France’s indoor organic PV specialist Dracula Technologies and Swiss-headquartered semiconductor manufacturer STMicroelectronics demonstrated a battery-free illuminometer at the Embedded World trade fair in Germany last week.

Researchers in Taiwan have discovered that in polysilicon production the crucible angular speed affects the oxygen concentration near the crucible wall, which in turn affects the wafers’ mechanical and electrical properties. They simulated a Czochralski process for an ingot with a diameter of 200 mm diameter and a length of 700 mm.

Researchers in Japan have developed a novel cathode material for rechargeable magnesium batteries (RMBs) in the form of rocksalt oxide. This new material reportedly enables efficient charging and discharging even at low temperatures.

An international research team has placed a neem oil tank on the back of solar modules for cooling purposes. The proposed solution reportedly improves PV panel performance by up to 17.8%.

Battery research is advancing to address issues in the lithium-ion development process and concerns about safety and aging. Vehicle-to-everything (V2X) tech, meanwhile, is in the starting blocks, but interoperability is the key hurdle to achieving mass market penetration.

Representatives from the European Solar Manufacturing Council, Ultra Low Carbon Solar Alliance, PVthin, and the Environmental Coalition on Standards have proposed changes to the carbon footprint accountability methodology, the use of green certificates, and the planned design of the Energy Label for PV products.

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.

Researchers in China have developed a photovoltaic cold storage system that is reportedly able to improve refrigeration capacity and ice storage rate. The system is said to ensure a stable cooling system operation for the refrigeration needs of agricultural products.