The research team from the Michigan Tech Open Sustainability Technology Lab has been working on the development of open source, solar powered delta 3D printers for a while. The latest development in the project resulted in a printer that can run consistently even in the absence of sunlight, thanks to a chargeable battery. The newest iteration is also less expensive and more compact, making it ideal for remote, off-the-grid communities in impoverished areas. Read more at 3DPrint.com.