Replies

To: Robert A Cook PE

Real world experience with my Sunpower panels installed in early 2015.

2015 - 7295 kWh
2016 - 7088 kWh
2017 - 7073 kWh
2018 - 6587 kWh
2019 - 6874 kWh

94% output after 5 years. Possibly higher given fluctuations in cloud cover in Northern California.

Will they last forever? NO

Will they pay for themselves in utility bills? YES

Data from Sunpower overall customer experience is 0.32%/yr reduction in output. 1.25%/yr is the sector wide average degradation.

https://energyhub.org/wp-content/uploads/2018/05/SunPower-Module-Degredation-PDF.pdf

This information is not hard to find. Where did you find your data?

12 posted on 04/22/2020 10:00:23 AM PDT by Go_Raiders (The fact is, we really don't know anything. It's all guesswork and rationalization.)

Good news. Thank you.

13 posted on 04/22/2020 10:03:00 AM PDT by Robert A Cook PE (I can only donate monthly, but ABCNNBCBS donates every hour, every night, every day of the year.)

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