ET Solar Inc. ET-P660270WW

ET-P660270WW

ET Solar Inc. ET-P660270WW

Good
  • Rated Power: 270W
  • Output Warranty Term: 25 year, Linear
  • Materials Warranty Term: 10 years
Rated Power
270W
Rated Power Per Cell
4.5W
Efficiency
16.6%
Power Tolerance
0/+5W
Temperature Coefficient
PMax: -0.41
Voc: -0.34
Resiliency
  • Snow
  • Wind
  • Hail
  • Fire

Power (measured in watts) and efficiency (how well panels convert sunlight to electricity) are some of the most common metrics used to compare solar panel products. While they are not the only means of comparison, they are important determinants in how much electricity you can produce with a solar panel system. Metrics like power tolerance and temperature coefficient are also important ways to analyze the potential performance of solar panels under the different conditions they will experience over their lifetime.

Output Warranty Term
25 year, Linear
Output Decline
Year 1
Years 2 to 25

2.5%
0.65%
Output at End of Warranty Term
81.9%
Materials Warranty Term
10 years

Solar panels generally come with an output warranty covering the energy production of the panel, and a materials warranty protecting you against undue wear and tear on your equipment. Learn more about solar panel warranties.

Cell colors
dark blue
Frame colors
black,silver
Backsheet colors
silver

Solar panels typically have black or blue cells, white, silver, or black backsheets, and silver or black frames. Bifacial solar panels are one exception to these rules, as they have transparent backsheets.

Cell type
Polycrystalline
Cell size
156x156 mm
Panel Dimensions
1640.0 mm L
992.0 mm W
35.0 mm D
Cell quality
60
Connector type
MC4

The physical characteristics of a solar panel have an impact on the product’s performance. For example, metrics like efficiency and wattage are based on the type, size, and number of solar cells used in a panel.

  • china's Flag China

Solar panels are made all around the world. While the bulk of solar panel manufacturers are based in Asia, companies in the United States, Canada, and other countries also produce high-quality photovoltaics.

Organizations like the International Electrotechnical Commission (IEC) and Underwriters Laboratories (UL) create national and international standards for photovoltaic solar panels to ensure any products on the market meet certain specifications for safety and reliability reasons.

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