Nov 1 (Reuters) - Abengoa Sa ABG.MC
* Algonquin Power & Utilities - entered agreement to buy from Abengoa 25% equity interest in atlantica yield for a total purchase price of about $608 million
* Algonquin Power & Utilities Corp says investment in Atlantica is expected to be immediately accretive
* Algonquin power & utilities corp says deal will be partially financed through concurrent bought deal $500 million common equity offering of apuc shares