UL Listed
Effciency 20.7%
Size  89 x 44.6 x 1.4 Inches
Weight  60 Lbs
VOC/V  49.2v STC (150v max 2 panels per string 250v max 4 panels per string 500v max 9 panels per string These value are for Virgin Islands only )
Isc/A 12.82A (use a 20a fuse or breaker for the string. #12 THHN minimum branch curicuit wire if in conduit or #10 PV wire )
In Virgin Islands 530 w modules will produce 2.6 KWH per day on a yearly average. Consider 2 KWH for a more conservative system design.
Spec sheet PDF 
Consider this module where you dont have enough lenght to add a panel above a panel. Maximize the roof area by the highest possible watts. 
We recommend three rails per panel and do not recomend Landscape orientation, unless you can use 3 rails top to bottom.