Anticipating silicon solar cells with significantly improved efficiency

Theoretical calculations indicate that under certain conditions silicon can endow solar cells with a much higher efficiency. Small silicon clusters may provide a source of accordingly modified silicon. However, to date these clusters have not been accessible in soluble form, a prerequisite for flexible processing. Researchers at the Technical University of Munich have now discovered […]

Choosing a variable frequency drive or soft starter

When accelerating an AC motor to full speed using a full voltage connection, a large inrush current may be required. Additionally, the torque of the AC motor is mostly uncontrolled and can shock the connected equipment, potentially causing damage. Variable frequency drives and reduced voltage soft starters can reduce inrush currents and limit torque thereby […]

The digitalisation of PV operations

All eyes are on digital technology as European PV plant operators continue to seek meaningful reductions in asset management and operations and maintenance (O&M) costs. Digitalisation promises to slash operational expenses and boost efficiency by automating many tasks that currently have to be done by hand, and by improving asset managers’ ability to rapidly identify […]

Medupi magic fails Eskom and South Africa – the stuff of nightmares

Following major problems that brought Eskom’s Medupi power station to its knees during the height of the load shedding last week, Medupi’s power station manager, Rudi van der Wal, is leaving Eskom to take up a position overseas. Van der Wal had resigned before the mess started, and was due to leave in about two […]