20W Powertech Monocrystalline Solar Panel
 
Made of grade-A solar cells, these solar panels are guarenteed to last. The solar panel has tempered glass with a hydrophobic coating to repel dust and water, meaning little maintenance is required. 
 
25 year limited warranty
All Powertech monocrystalline solar panels are covered by a 25 year limited warranty. This warranty covers the panels for defects in construction and manufacturing for a period of 5 years, and warrants that the electrical output will remain above 80% of its original rated output for a period of 25 years.