Solar panel Model Facade Concept

[J.P.M.]

In theory the temp of the panel could go down as you start to draw power from it.
An open circuited or short circuited panel has to dissipate all of the incoming solar energy but a loaded panel can send some away on the wires.

Yup.

[inetdog]

In theory the temp of the panel could go down as you start to draw power from it.
An open circuited or short circuited panel has to dissipate all of the incoming solar energy but a loaded panel can send some away on the wires.

[J.P.M.]

Yeah, the overproduction only lasted about ten minutes - then the panels warmed up and production dropped. It did give me a much better perspective on the kind of design margins you need for solar power systems.

And best to measure under quasi steady state conditions due to warmup (delta T.)/production drop time being f(P.O.A. irradiance, wind vector, amb. temp., thermal time constant of the array), all going into a heat/energy balance on the array.

[jflorey2]

I would agree that your system can over produce when it is cold and the light is magnified by the water on them. Unfortunately unless is rains at night or very early morning those rain clouds will just cause all kinds of issues for the sunlight to get to your panels.

Yeah, the overproduction only lasted about ten minutes - then the panels warmed up and production dropped. It did give me a much better perspective on the kind of design margins you need for solar power systems.

[inetdog]

I should have qualified that to refer to rain heavy enough that water on the panels might have any measurable impact on their light collection.

[SunEagle]

Some of my highest productions (10-15% OVER STC DC ratings) have been during light rain. The panels are clean, they are cold from the rain - and when the sun comes out momentarily, the clouds cause lensing that increases the insolation to the panels themselves.

I would agree that your system can over produce when it is cold and the light is magnified by the water on them. Unfortunately unless is rains at night or very early morning those rain clouds will just cause all kinds of issues for the sunlight to get to your panels.

[J.P.M.]

[QUOTE=inetdog;n302544]And while it is actually raining the panels are not producing usable power anyway!QUOTE]

I think you might have got your tit in the ringer a little bit on that one.

[jflorey2]

And while it is actually raining the panels are not producing usable power anyway!
(Note: This is a reply to jflorey2, not to GoldCobra.)

Some of my highest productions (10-15% OVER STC DC ratings) have been during light rain. The panels are clean, they are cold from the rain - and when the sun comes out momentarily, the clouds cause lensing that increases the insolation to the panels themselves.

[bcroe]

And while it is actually raining the panels are not producing usable
power anyway! (Note: This is a reply to jflorey2, not to GoldCobra.)

Well, I usually see somewhere from 4 KW down to 1 KW during rain. It all counts. Bruce Roe

[SunEagle]

Some one is pissed and spending a lot of his time deleting all his old posts. Too bad. I believe he enjoyed experimenting with solar cells and would have been interesting to read about what he found.

You guys know everthing. Im out.

[inetdog]

(BTW having rain fall on them is a good thing; it cleans them.)

And while it is actually raining the panels are not producing usable power anyway!
(Note: This is a reply to jflorey2, not to GoldCobra.)

[jflorey2]

My concepts are new and inferior.

True dat. Generally if you are in an area where such a "carport" would work, you can mount them at an angle that will allow them to shed snow naturally.

(BTW having rain fall on them is a good thing; it cleans them.)

[nomadh]

Tilting them completely vertical is not very good. you will not be producing as much power. Having them vertically tilted would produce 40+Percent less power.
Yes there is a need to have a roof over them.
Im sorry but you are wrong.
It is essential in our northern area and climate.
Also. Whats stopping you to develop a vertical solar array. rather than completely horizontal.
My concepts are new and inferior.
your logic is completely cold hearted.
please no more replies you pissin me off.

Lighten up a bit

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