we have own solar panel sub-factory and specialized in manufacture solar panel for years, We can produce solar panels from the size 2 watts to 320 watts per piece, no matter mono crystalline or poly crystalline, the relevant index are as below: relevant index: 1) Power range: 2WP to 320WP per panel 2) Mono crystalline or Poly crystalline 3) Packing method: carton 4) Quality: first grade and good efficiency of cell, glass used Low-carbon toughened glass 5) Warranty: 2 years product warranty and 25 years 80% of power 6) Standard test conditions: AM1.5 100mW/cm2 25oC 7) Tolerance: +/-5%, solar cell&＃039;s efficiency can get to above 16% 8) Approvals: CE. and IEC61215 9) Regarding to measure, we can according to your demands to produce 10) Certification: CE, IEC, certificate, TUV is under auditing 11) System voltage: 12v/24v