Skeleton Technologies, a manufacturer of ultracapacitor-based energy storage solutions, raised €108 million (~$114 million) in a funding Series E1 round to expand the company’s product development and finance the manufacturing expansion for supercapacitors. The round saw participation from Siemens Financial Services (SFS), Marubeni Corporation, Berkshire Hathaway, and Brazilian mining company CBMM. With the concluded Round E1, Skeleton’s total funding exceeds €300 million (~$316 million).