Home energy management startup Tendril has gone through a lot of changes over its 14 years, including a near-death experience and a slow-but-steady climb into the top tier of customer engagement and energy intelligence providers for U.S. utilities. Now the Boulder, Colorado-based company has hit a new milestone for the venture investors who’ve put more than $100 million into it to date: an exit. On Tuesday, Tendril announced it has secured a majority investment from private equity firm Rubicon Technology Partners, with participation from Morgan Stanley Alternative Investments and Zoma Capital.