Month: September 2011

With DoE, DoD Backing SolarStrong Aims to Double US Residential Solar Power Installations

SolarCity’s SolarStrong project, which could double the number of US residential solar power installations, moved a step closer to becoming reality yesterday when Energy Secretary Stephen Chu approved a conditional commitment to partially guarantee a $344 million loan. Part of the SolarStrong project entails SolarCity working with leading US military housing privatization developers to install, own and operate as many as 160,000 rooftop solar power installations on as many as 124 military housing developments across 33 states,

Making Cheaper and More Efficient Solar Cells with Copper

There are two ways to lower the cost of producing energy through photovoltaics – more efficient solar cells (more power per square foot) and lower production costs (lower cost per square foot). The ETAlab of the Fraunhofer ISE has devised a way to do both simultaneously. The research team in the laboratory for new solar cell structures and processing steps has not only made the solar cell contacts out of 100% cost-effective materials (replacing expensive silver with cheaper copper and nickel), but the process also increases the efficiency of the solar cell to a very respectable 21.4%.