Brookfield Renewable (NYSE: BEP) (NYSE: BEPC) has gone on a monster run over the past year. Brookfield estimates that it can grow its cash flow per share at an 11% to 16% annual rate through at least 2025, powered by the following factors: Embedded inflation escalators in existing contracts should add 1% to 2% to its bottom line each year. Margin expansion activities such as leveraging its scale to reduce costs and selling renewable power at higher rates as existing contracts expire should add another 2% to 4% to its annual cash flow per share.