Guarantee: 30 days free no-questions-asked returns + return label provided + 2-year warranty on solar panels + free replacement if damaged within 90 days. Long warranty period and perfect after-sales service. About AP-SP-037-BLA 【Market-Leading New Release】: As the first 600W SOLAR PANEL on the market, ALLPOWERS SP-039 has a 600W power input, it can provide your power station with a significant amount of energy with outstanding efficiency. 【Astonishing High Efficiency】: Designed with monocrystalline cells, the ALLPOWERS 600W portable solar panel is able to generate more energy than standard solar panels, can convert up to 23% of sunlight into usable electricity, higher than similar products on the market (22.4%), giving you solar energy even on an overcast day. 【Extremely Portable】: The ALLPOWERS SP-039 has 6 foldable panels, but its folded size is only 23.6 * 35.7 * 1.9 inch (27.5 lbs), much lighter than other 400W solar panels (30lbs) on the market. It can be easily packed up and