Carmanah CTI-135-MH 135W Solar Module with Mounting Hardware Made for use in RV, Marine, Off Grid, Grid Tie applications Plug and Play connections (MC4) allow you to wire multiple panels together in parallel (12V) or in Series (24VDC to 1000VDC) Includes simple to use mounting hardware to attach panel to flat surface. Example; On an RV roof 25 Year Output Warranty backed by the reputable Carmanah Technologies Corp Durable panel. Tested with 1 inch hailstones at 50MPH