Technology and R&D

Researchers in China have successfully prepared cobalt oxide-modified graphite felt as an electrode material for an iron-chromium flow battery. The electrode performance significantly improved due to the effects of cobalt, which in turn boosted the energy efficiency and overall performance of the battery.

pv magazine speaks to Gianluca Coletti, program manager of tandem photovoltaic tech at Dutch research institute TNO, about initial attempts to bring tandem perovskite-silicon solar cells to market. He says the first PV products based on the highly efficient technology could make an appearance sooner than expected.

China’s Longi claims that its new ALK Hi1 electrolyzer can produce hydrogen with an energy content of 4.3 kWh per normal cubic meter. It says the levelized cost of hydrogen could be up to 2.2% lower than other electrolyzers on the market.

Naked Energy is commercializing a photovoltaic-thermal system to capture excess heat generated by PV modules for use in buildings. The VirtuPVT system, conceived for rooftop applications, includes an absorber plate, monocrystalline PERC solar cells, a borosilicate vacuum tube, an integrated reflector, and an integrated mounting system.

The University of California, Merced, has shown that up to 13 GW of solar capacity could be installed over California’s canals, which would require approximately 3 GW of energy storage.

A new report by IEA-PVPS Task 16 looks at the use of “implicit storage” to transform intermittent renewable sources such as solar and wind into firm power generation. It shows that the total cost of the electricity system transformation could be lowered with the optimal use of capacity overbuilding and dynamic curtailment.

Joachim Steenstrup, head of public affairs for Denmark-based Eurowind Energy, speaks to pv magazine about hybrid solar-wind projects, why the hybridization trend makes financial sense, and how PV-wind hybrid installations are the building blocks for the “energy centers” of the future.

Seaward’s new PV150 test instrument measures open circuit voltage, short circuit current, earth continuity, insulation resistance, and operating current. It weighs 0.95 kg and comes with a two-year warranty.

European researchers have looked at how zinc phosphide could be used in solar cell development and found that monocrystalline thin films might perform better than polycrystalline films in electrical devices. They also determined that the performance of such films is directly correlated to the zinc/phosphide ratio.

Researchers in Germany have assessed direct coupling and integration between PV and batteries at the scale of a single PV module. They say their solution could be cheaper and provide superior performance than maximum power point tracking (MPPT) in optimizing PV system performance.