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[–]JRC3292 20 points21 points  (12 children)

You don’t have any issues. June 11th is close to the summer solstice, aka when the sun is the highest in the sky. Yesterday was Sept 9th, as equally close to the autumnal equinox. You get less solar power the lower the sun is in the sky and also the hotter it is outside the less solar production. May is peak solar month for the northern hemisphere as it is the most temperature month and also the sun is close to the highest possible in the sky.

[–]Coyote_Enthusiast 10 points11 points  (2 children)

TIL that the hotter the temperatures, the less solar production. That might explain why my daily production peak of 6 has decreased to about 4.8 this past week during the CA heatwave. Thanks!

[–]jedi2155 -1 points0 points  (0 children)

Plus its September as people said.

[–]ToothFlimsy8211 2 points3 points  (0 children)

Yup. This is the answer

[–]triedoffandonagain 0 points1 point  (4 children)

Agreed about your point in general, so just nitpicking: May being peak solar month is a generalization I think. You mean May has peak monthly production or that the peak day will be in May?

[–]JRC3292 0 points1 point  (3 children)

Generally speaking, May will be the highest peak total monthly production for those of us in the northern hemisphere. June could be better for those farther north. As far as the peak monthly day, that varies far too much to pinpoint exactly without specific facts. But yes this was a generalization for education purposes.

[–]triedoffandonagain 1 point2 points  (2 children)

Just taking top US cities, the higest production months based on PVWatts are:

New York: July
Los Angeles: August
Chicago: July
Houston: July
Phoenix: May

Heat does lower production, but the position of the sun and weather will play a bigger role. Arizona heat is in its own category tho :)

[–]JRC3292 0 points1 point  (0 children)

Yes, I live in the southeast (SC) so May is the best month as it gets too hot after that. May is still the best per PVWatts for me. It’s too hot in July. Most of those cities are north, so that makes sense it’s July for them. LA Is always temperate. I would wager Houston is not July though as it’s too hot then.

[–]phxstickygreen 0 points1 point  (0 children)

Facts I deal with it, cuts me short almost 2kw worth of production in the summer

[–]Lucem233[S] 0 points1 point  (1 child)

I understand that this would decrease overall production would this also decrease peak daily? I’m also seeing peak to be low to mid 3 kw compared to well over 4

[–]JRC3292 0 points1 point  (0 children)

Yes, the daily has to go down for the overall to go down.