Grade A and best price 330W photovoltaic polycrystalline black solar panel from china, 330W solar PV module.
Solar energy products are a trend and good way to achieve zero home bills or commercial invest in the future. So choose a good solar panel is important.The key factors to consider when comparing solar panels are performance (they should produce the power that the rating leads you to expect), quality, durability and beneficial warranty terms.
Quality and Warranty
For a period of twenty‐five (25)years commencing on the Warranty Start Date, loss of power output of the nominal power output measured at Standard Test Conditions (STC) for the Product(s) shall not exceed:
For Polycrystalline A grade solar cell, 3% in the first year, thereafter 0.66% per year, ending with 81% in the 25 th year after the Warranty Start Date;
The Warranty Start Date shall be defined as the date of the Bill of Lading date.
10Years Manufacturing Warranty / 15Years Warranty 90% Power Output /25Years Warranty 85% Power Output