After raising more than $100 million over the past seven years, GreenVolts, a California startup that makes concentrating photovoltaic systems, has closed its doors after a major investor abruptly withdrew financial support for the company. “A sudden, and unexpected, change in direction from a major strategic investor has affected GreenVolts’ access to funding,” the company said Wednesday in a statement, referring to ABB, the Swiss power and automation giant. “The impact was at the last minute and so severe that GreenVolts cannot continue normal operation and has reduced its workforce to a small team to provide customer support and engage...