Does this imply that two separate arrays, one facing East the other West (due to limited roof realestate) could be connected in parrallel without the need for a dual tracking inverter with only a small performance hit. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .