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 by Staff Writers Charlotte NC (SPX) May 18, 2020
The City of Charlotte has become the first municipality to execute a renewable power agreement under Duke Energy's Green Source Advantage (GSA) program - further expanding solar energy in North Carolina. The 35-megawatt (MW) solar facility will be constructed in Iredell County. Under a 20-year power purchase agreement, Duke Energy will secure zero carbon power to partially offset the city of Charlotte's energy demand. "We are proud to be a municipal leader in North Carolina and in the U.S., not only setting ambitious climate and energy goals, but taking actions on those goals to support the environment and health of our community," said Charlotte Mayor Vi Lyles. The city will partner with Carolina Solar Energy, a North Carolina-based solar energy company, and Ecoplexus, an international solar energy company with offices in Durham, N.C., to build the solar farm, which is expected to be fully operational in 2022. The facility will be along Tomlin Mill Road near Statesville. "Our customers want more options to secure renewable energy and the Green Source Advantage makes that happen," said Stephen De May, Duke Energy's North Carolina president. "We designed the program to be flexible and allow larger users to negotiate directly with third-party developers. It supports our customers' goal and expands renewable energy in North Carolina." The GSA program is an outgrowth of 2017's landmark solar legislation in North Carolina. Programs such as solar rebates for customers and solar leasing were also part of that legislation. In 2015, Duke Energy's pilot program for GSA - the Green Source Rider - had companies like Google and Cisco participate. The GSA allows large customers to offset its power purchases by securing renewable energy from projects connected to the Duke Energy grid. The customer may keep the renewable energy certificates (RECs) from the projects and use the energy purchased to satisfy sustainability or carbon-free goals. The move fits well with Charlotte's goal to have its municipal fleet and facilities be fueled by 100% zero-carbon energy sources by 2030. Participation in Green Source Advantage means the City of Charlotte will offset a portion of the energy supplied to its municipal operations with renewable energy. The city and the solar developer agreed on the specific project and additional costs associated with energy from the facility. Other Duke Energy customers will not pay for any part of the project. Overall, 600 MW of capacity is available under the Green Source Advantage program for large Duke Energy customers in North Carolina. Currently, Duke Energy maintains more than 3,300 MW of solar power on its energy grid in North Carolina and operates 40 solar facilities. North Carolina currently ranks No. 2 in the nation for overall solar power.
On the road to non-toxic and stable perovskite solar cells Berlin, Germany (SPX) May 12, 2020 Among the new materials for solar cells, the halide perovskites are considered particularly promising. Within a few years, the efficiency of such perovskite solar cells raised from a few percents to over 25 %. Unfortunately, the best perovskite solar cells contain toxic lead, which poses a hazard to the environment. However, it is surprisingly challenging to replace the lead with less toxic elements. One of the best alternatives is tin. Halogenide perovskites with tin instead of lead should show e ... read more
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