Well my Canadian Solar HiKu Mono CS3N 415W's are still producing energy after 15 months. They're still vaguely rectangular, haven't warped, cracked, rusted, washed away or turned a funny yellow colour... so, have no need to use the warranty. Do PV panels fail that often? Does anyone care if they are CS, QCells, JA, Jinko, Trino or Longi?