Granara will be leaving a troubled company to extremely profitable one.GT Solar posted a net profit of $175 million, or $1.24 a share, in fiscal 2011, with a backlog of $1.2 billion.On the other hand, A123 — a producer of lithium batteries for electric and hybrid cars based in Waltham, Mass. — lost $53.6 million last quarter, or 51 cents a share. It lost $87 million in 2009, and $153 million last year. A123 went public in 2009 with high hopes – trading as high as $25 a share, but was never profitable, and now sells below $6.According to GT Solar's filing, Granara will get a base salary of $235,000, a target bonus of 40 percent of that salary and grant of 40,000 restricted stock units.GT also added two new board members — Mary Petrovich, general manager of AxleTech International LLC and Robert Switz, former CEO and chair of ADC Telecommunications Inc.