12 years limited workmanship warranty. No less than 97.5%output power in the first year. No more than 0.5% annual declination since the second year. 30 year warranty at 83% power output. Product liability and E&O insurance has been covered by Chubb Insurance

Maximum power（Pm）	W	330W	340W	350W
Optimum Operating Voltage（Vm）	V	37.65	38.02	38.69
Optimum Operating Current (Im)	A	8.77	8.95	9.05
Open-circuit Voltage (Voc)	V	46.45	46.79	47.35
Short-circuit Current (Isc)	A	9.23	9.37	9.50
Cell Efficiency	%	19.10	19.80	20.30
Module efficiency	%	16.90	17.41	17.93

STC (Standard Test Condition): Irradiance 1000W/m2, Module Temperature 25℃, AM=1.5 NOCT: Irradiance 800W/m2, ambient Temperature 20℃, wind speed 1m/s