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I bought some used cheap panels just to get myself introduced to solar. - Panels were rated 140W, they produce merely 90W in full sun (on a cool day) - Panels VoC was 78.8V, but measures about 72V now Can use the lower voltage in my calculation to put them in series or not? They don't look...

I'm trying to get my shed powered via solar (12x24). I got my hands on 9 145W panels with have a 80 Volt. That seems a bit high but seems like it was good price to get started. I really like to have an all-in-one system but the max input is 145V. Can I put all these panels in parallel to stay...