Equating camera settings to panel output

[jockellis]

Using Kodak Tri-X on a bright, sunshiny day requires f16 at 1/500th of a second. Using that film on an overcast day might require f5.6 at 1/250th of a second or 16 times the combined amount of lens opening and open shutter time. So I'm guessing that a 60/hr watt solar panel puts out roughly 4 watts per hour on such a day?

[Mike90250]

f stop brightness is not the same as sun incident angle. the more perpendicular the sun is to the panels, the more power.

[Sunking]

No relationship whatsoever with camera F Stops and film speed.

[jockellis]

Camera

So on an overcast day what wattage would a 60 watt panel produce?

[Naptown]

So on an overcast day what wattage would a 60 watt panel produce?

That would depend on the irradiation for the day measured in KWH per square meter. And in mostly the visible spectrum.

[Sunking]

So on an overcast day what wattage would a 60 watt panel produce?

1 to 6 watts or less.

[jockellis]

So while cameras and solar panels don't really have anything to do with each other, my estimate of four watts was in the ballpark. So you'd have to have about 15 panels just to run a 60-watt light for a few hours on a rainy day.

[Mike90250]

my 3000 w array, produces between 200-400 w in overcast sky.

[jockellis]

Mike90250, what do you power with this set up? From reading your info at the bottom of your post it sounds like you have a nice setup.

[Mike90250]

Mike90250, what do you power with this set up? From reading your info at the bottom of your post it sounds like you have a nice setup.

Large shop with many tools, arc welder, and irrigation pump that runs several hours a day in dry weather. Hopefully, in 6 months, it will also power my house.

[jockellis]

Mike90250, are you expanding either or both, your array and storage or are they already enough and your house just needs rewiring? Years ago, I read that an LA Angels game was postponed because of rain. The PR staff had to go on a real hunt to find out when the last baseball game there had been rained out and it turned out to be a minor league game in 1957. So what percent of the days there are clear and bright? Is there a website somewhere that has this information for all areas of the country or would I have to ask a local TV weatherman?
On another note, in my old newspaper I read a report on the recently completed Georgia General Assembly about The Georgia Power Company quashing a bill which would have made it easier for people to be their own power company through solar panels and save money. I couldn't help but laugh because rural Georgia legislators have a long history of bashing the power company. The senator we had when I owned the newspaper, Roscoe Dean, would talk bad about the company wherever he went to give speeches. A Georgia Power exec laughed when I told him about this and replied, "But he never once voted against us."

[Mike90250]

system A. Grid-Tie house in the city, with a 4.5KW west facing PV array. It zeros out my electric bill, except for monthly connect charge.

system B. Off-Grid Shop and House (house under construction -plans in permit process) will be running off a 3KW array, and a 42,000 WH NiFe battery bank