Welcome to Winter (Solstice)

"different electrical resistivity" does not equate to being a battery. And that link makes no mention of any battery.

 

It would probably be more useful to compare capacity ratings. Mine is rate 7.0 kW DC, 6.0 kW AC. But I am one of the few who give AC capacity, most just list the DC figure.

For those who must know, my PV modules cover 26 x 1.677 m^2, or 43.6 square meters, not counting the inter-module gaps (1" wide clamps in original field, 0.5" in second field).

I would like to add another 2 to 3 kW-DC, but other activities interfered this year, and the increased frailties of age might keep keep me from ever doing such roof work again.

Today's modules are both larger and higher efficiency than what I have.

 

For sure. If you're at the North (or South) pole at summer soltice, it must be strange as heck: the sun's a particular angle up from the horizon (~23 degrees), and stays at that angle, tracing a circle all the way 'round, in the course of 24 hours.

 

right now, there's more than an hours extra light in orlando compared to boston

on june 21st, we get an extra hour and a half in the morning, but who cares, farmers?

 

Every US state is represented by a VERY tiny number of people who thought that Seinfeld was mindless drivel.
Since I am a proud delegate of Indiana's portion of that minority I had to look up some of the details of this Festivus holiday, since I had no other frame of reference.

AND.....I'm glad I did!!!

I'm SO looking forward to @Mendel Leisk Airing of Grievances and the Feat of Strength......
DONT MAKE US MAKE A THREAD!

 

Well, grievances...:

Our daughter alerted me to this phenomena, because she'd bought the pipe, and could I make a base. I made a nice, sturdy one I thought, a big improvement on the pictured original.

I thought wrong, had to dumb it down, make another, faithful to the obviously inferior one.

Don't walk away, there's more....

 

Must be aluminum.

 

If you Market it, they will come

 

That's some extra-heavy irony right there.

 

Oh, the sacrilege:

 

Ours was a solid aluminum pole.

 

Did you keep it in the crawl space?

 

It's our daughter's. I doubt she has a clue where it is now, a few years later.

 

Just gonna get some popcorn....

 

Yes. This seasonal daylight change from the tilt of the poles has zero impact at the equator, increasing at the poles from zero daylight in winter, to 24 hours in summer. At my latitude, daylight varies from about 8 hours at the winter solstice to 16 hours at summer solstice.

Checking up and refreshing on other things things, there is a different change at and close to the equator. Because of Earth's orbit being elliptical instead of perfectly circular, the length of the solar day varies around the year, but by less than +/- 30 seconds. At the equator, both day and night are equally longest about December 23, and shortest about September 16. This effect covers the whole planet, but is overwhelmingly swamped by the tilted polar axis once you get any distance from the equator.

 

As a holiday gift to PriusChat, I address a question: where on Earth has the most hours of daylight - when Sun is visible above horizon. I used website

Timeanddate.com

Doing this. I am among those accepting idea that Earth is nearly spherical and orbits Sun with an inclination of about 23.5 degrees. Things come from that. Different latitudes on Earth ‘see’ Sun above horizon for different total hrs in a year. Before disclosing, I ask readers to say/claim/guess what latitudes see the most light. Please do not scroll down before staking your claims.


































Having examined latitudes in 10 degree bands, the most lit is 80 degrees (N or S). More accurately it is may be above or (probably) below 80 degrees, but I have not looked closer. It is certainly poleward from Arctic/Antarctic circles at 66.5 degrees latitude. PriusChat readers might have occasion to win bar bets on this. Other bettors may suppose that equatorial or polar sites get the most light. Take their money and send none of it to me. To win you might need to do actual work extracting and processing data from timeanddate.com

Giod.

 

^ Cheating by searching online, I'm finding several conflicting answers, citing different factors that I'm not sure others considered. Will have to explore this later.

People exploring this should remember the definition of sunrise and sunset, which is when the top edge of the sun, not its center, is visible on the horizon. The sun is not a point source, but has a real angular diameter. And near the horizon, atmospheric refraction causes the sun to appear higher than it really is (or would appear if the atmosphere vanished). This amount is variable depending on weather, but almanacs just picked a standardized value. Because of these effects, annual daytime exceeds annual nighttime by many hours.

P.S. The Earth's orbit around the sun is not circular, but slightly elliptical, so the Northern and Southern hemispheres must be treated separately.

 

Solar edge visible above horizon is why equator sites get about 12.1 hrs of sunshine daily throughout year.
Totaling 4423.5 hrs/yr. But bested at 80 o latitude with 4627 hrs/yr.That's the fun of it - 200 hrs more.
I can 'explain my work on this in detail if anyone really wants to know.

Have not come up with an explain that 'squares' with flat-earth hypothesis.

 

See the most light or see light the most?
Local horizon at sea level or the reference ellipsoid or the local horizon?
Does daylight include light from the sun during one of the twilights (nautical, civil, astronomical) or 'directly lit?"

If we presume a local horizon and 'directly lit' then the answer is probably in the southern hemisphere which in 'lit' latitudes is a little bumpier.