Modules & Upstream Manufacturing

Researchers in the United States claim to have significantly increased the efficiency of a perovskite solar cell by applying a range of pressures to the device. According to them, pressure-assisted processes such as lamination, cold welding and rolling/roll-to-roll processing can be used to improve interfacial surface contacts in perovskite cells.

Researchers in Australia have conducted a ‘cradle to grave’ life cycle assessment (LCA) of the four most widely used PV technologies. The academics say that cadmium telluride solar modules have the lowest life cycle impact, followed by amorphous, multi and monocrystalline silicon products.

Researchers from the U.S. Naval Research Laboratory have launched first orbital experiment with space-based solar power. They have sent into space a 12-inch square tile photovoltaic module that is expected to test the viability of space-based solar power systems converting sunlight to microwaves outside the atmosphere.

The solar learning curve usually applied to panel costs has been extrapolated to the larger, non-module element of the price of solar electricity generated by big projects, leading one commentator to predict new solar projects could be cheaper than legacy fossil fuel plants within 10-15 years in certain markets.

Datang Group has launched a bidding process to procure 5.5 GW of PV modules and inverters for its own solar projects. The SNEC trade show in Shanghai has set new official dates, after being postponed in early April due to the Covid-19 pandemic. And Topray Solar is seeking to raise funds for a 200 MW solar project in Guangdong province.

Rivas-Vaciamadrid-based company Aurinka is planning to start UMG silicon manufacturing in Puertollano, Castile-La Mancha, this year. The company says its patented low-carbon production process offers low enough manufacturing costs to compete with Asian rivals.

German panel maker Sonnenstromfabrik has developed a glass-glass monocrystalline PV module in three versions offering different levels of transparency. The company says the transparency feature makes the panels suitable for verandas, pergolas, awnings, carports, swimming pools, halls and facades. Their power output varies from 160 W to 280 W, while their efficiency ranges from 9.5% to 16.7%.

Researchers in Japan have demonstrated a new concept for a ‘heat-recovery’ solar cell, which they claim has the potential to exceed the theoretical limit for cell efficiency. They say, however, that a suitable material for the energy filtering layers is yet to be identified. The cell is equipped with a 100-micron thick silicon absorber, two electrodes and carrier-energy filtering layers placed between the absorber and electrodes.

Installers which took advantage of cheaply-priced government finance say customers affected by the Covid-19 crisis cannot afford to pay for the solar home systems they have rolled out while expanding renewables programs.

SunPower has had to make fundamental changes to continue to be relevant in a solar industry very different from that of its roots. The company aims to become an energy service provider and is leaving low-cost manufacturing to its Chinese partner.