Mission Solar MSE PERC 66 Black 385W

Solar Panel Performance

Power Rating 395W

The Mission Solar Energy MSE PERC 66 MSE395SX9R is rated for 395 watts.

Efficiency 18.9%

Mission Solar module efficiency rating of MSE PERC 66 MSE395SX9R 18.9% places on the higher end of average solar panel efficiency. Their achievement is largely due to the 6 bus bars on their mono-PERC cells, which allow more electrons to flow through each solar cell.

Power Tolerance 0/+3%

Power tolerance refers to the amount of electricity it will produce either above or below its rated power capacity at Standard Test Conditions (STC). The smaller the power tolerance deviation or range, the more accurate the rated power capacity is.

Mission Solar modules have a power tolerance of -0/+3%.

This means Mission Solar panels will, at the very minimum, operate at their rated capacity, However, these panels have exceeded, by as much as 3%, of its rated capacity. For example, a Mission Solar panel rated at 385 W will be able to operate anywhere from 385 W to 396 W (or 3% higher than 385) under STC.

With a -0% tolerance rating, the MSE PERC 66 Black 385W panel operates at, or above 385 W. These performance scores, coupled with Mission’s high manufacturing standards, equate to real world performance under Texas' most extreme operating conditions.

Temperature Coefficient PMax: -0.36 Voc: -0.261

Solar panels perform best at 77°F (25°C). Obviously, Texas temperatures will far exceed 77°F for long portions of the year. A solar panel’s temperature coefficient is a measurement indicating how well a specific model of solar panel will perform outside of ideal operating conditions.

Knowing a panel’s temperature coefficient and the temperature of the panel will allow you to predict your panel’s performance during the dog days of summer.

Temperature coefficients are calculated in Celsius.

With each degree above 25°C (77°F) a given solar panel’s electric output will be diminished by its temperature coefficient.

Using the above methodology, ht MSE PERC 66 panels has a temperature coefficient of -0.36%/°C. Hence, when this panel’s temperature increases by one degree, from 25°C to 26°C (77° F to 79° F), expect a 0.36% reduction in potential electric output.

When it's July in Texas and temperatures have climbed to 95°F (35°C) expect electric output to decrease by 3.6%. When the hottest hours of summer days drive the mercury into the triple digits – say, 113°F, the Mission Solar MSE PERC 66 will decrease by approximately 7.2%.