Technology

The Netherlands storage industry association and the Dutch grid operators have proposed a faster phasing out of the net metering scheme to enable wider adoption of batteries among PV system owners. A 30% rebate on the purchase and installation of residential storage systems could help achieve the plan.

Although wind power dominates the renewables scene in the Republic of Ireland and the North – and even natural gas has a bigger role to play – the grid companies of the neighbors have revised up their estimates of how much solar will be needed, after talking to the public and industry.

Scientists at Germany’s Fraunhofer Insititute for Solar Energy Systems (ISE) evaluated the performance of its newly introduced ‘Matrix’ approach to interconnecting shingled solar cells. The institute finds that, thanks to optimized current flows, energy yield of the Matrix approach could almost double that of standard shingled cell interconnection under random shading conditions.

Developed by a U.S.-based start-up, the new manufacturing process is claimed to reduce silver consumption and improve solar module performance by up to 3 W. It consists of connecting sub-cells in series within a single cell in order to increase the device voltage and without requiring cells to be physically broken and rewired.

Tested in an off-grid location in India, the proposed approach includes the use of thermal storage from PV modules’ excess heat for space and water heating. The optimum configuration for the system was given by the combination of a 224 kW PV system equipped with a phase change material, a 206 kW wind turbine, a 420 kW biogas generator, a 633 Ah battery, and a 170 kW converter.

While the adoption of large-format wafers has driven a wave of capacity expansion for PERC, existing manufacturers and new entrants continue to evaluate TOPCon and HJT. An increasing number of HJT pilot lines and gigawatt-scale capacity expansion projects are appearing, as manufacturers see the advantages of fewer process steps, higher efficiency ratings, and better yield rates. The localization of equipment is also a driving factor. PV InfoLink’s Derek Zhao offers an update on the latest developments and process routes for HJT.

A 245 kWh mobile storage solution from Swedish manufacturer Northvolt was connected to an operational section of a PV plant under construction in Sweden to replace diesel power generators. According to the project developer, around 500 kW of the operational capacity of the solar park will be enough to power the site’s operations through the battery.

The Spanish energy company received 110 proposals from 32 countries. Three of the four selected projects are aimed at deploying agrivoltaic solutions.

Scientists in Germany analyzed the main sources of performance loss in a silicon heterojunction cell, and developed several optimization strategies to improve overall performance. By adding a second layer of amorphous silicon at the rear of the device, and a magnesium fluoride anti-reflective layer, they were able to boost cell efficiency by around 1% to reach 24.51%.

A European consortium consisting of Italian energy agency Enea and the French Alternative Energies and Atomic Energy Commission, among other entities, has developed a plan to build a low-emissions pilot line to recover critical and precious metals such as silicon, indium, gallium and silver. The line will be designed to reintroduce new materials and new products into the production cycle.