... efficiency solar panel: 1)Monocrystalline/polycrystalline 2w-300w 2)CE TUV certificate 3)5 years warranty 5w~100w solar panels Our services ... efficiency can get to above 16%.7) Certificates: CE, IEC,TUV.8) Packing method: carton, wooden case, pallet. The more ... % for solar panels, 1year for solar systemsOEM order: welcomedCertificate: CE,TUV, UL etc.Package: carton, wooden case or as your spec ...