When the Guy Hands-led private equity firm started marketing the fund two years ago, it presented it as a $2 billion vehicle targeting 15 percent returns from investments in OECD-based renewable assets that, shall we say, needed work. ...But two years later, Terra Firma has downsized its renewables fund from $2 billion to $500 million and cut its returns target to 10 percent. Which is another way of saying that it won't be focusing on large-scale deals anymore...