I would like to thank Harry and all other members of the group who supplied
information.

It was much appreciated.

Kindest regards,

Jim G

In message
, harry
writes
On May 24, 11:42*pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of days,
what prevents solar panels producing the full permitted 4KW. Down to 2KW
now.

A few days earlier, when not as hot, solar panels were producing 3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

--
geoff

On 25/05/2012 19:00, harry wrote:
On May 25, 2:08 pm, "Dave Liquorice"

You only need to have a basic knowledge of photography to know that open
shade will give you 1/4 the light of full sun.

As will light cloud. Deep cloud reduces it anther 2-4 times, and you can
halve the output again within an hour of sunset.

But basic knowledge isn't your strong point, is it harry?

But it's not simply the amount of light being reduced the panels are
series connected and a shaded one reduces the terminal voltage and
possibly increases the source impedance so the panels that are fully
illuminated can't deliver their energy to the invertor.

--
Cheers
Dave.- Hide quoted text -

- Show quoted text -

He doesn't understand such things Dave. You can't educate pork.

What Dave has written has obviously sailed over your head.

Are your sPiV-priced panels series connected?

--
Adrian C

On 27/05/2012 12:57, geoff wrote:
In message
, harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of days,
what prevents solar panels producing the full permitted 4KW. Down to 2KW
now.

A few days earlier, when not as hot, solar panels were producing 3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though.

--
Regards,
Martin Brown

On May 27, 1:48*pm, Adrian C wrote:
On 25/05/2012 19:00, harry wrote:





On May 25, 2:08 pm, "Dave Liquorice"
You only need to have a basic knowledge of photography to know that open
shade will give you 1/4 the light of full sun.

As will light cloud. Deep cloud reduces it anther 2-4 times, and you can
halve the output again within an hour of sunset.

But basic knowledge isn't your strong point, is it harry?

But it's not simply the amount of light being reduced the panels are
series connected and a shaded one reduces the terminal voltage and
possibly increases the source impedance so the panels that are fully
illuminated can't deliver their energy to the invertor.

--
Cheers
Dave.- Hide quoted text -

- Show quoted text -

He doesn't understand such things Dave. *You can't educate pork.

What Dave has written has obviously sailed over your head.

Are your sPiV-priced panels series connected?

--
Adrian C- Hide quoted text -

- Show quoted text -

Yes they virtually always are on a small domestic installation. The
idea is to get the Vopen circuit as close to the max operating voltage
of the inverter as possible. This prolongs the running hours, hence
power generated..
It has to shut down when the DC output voltage falls to AC peak value
(ie around 350v)

On May 27, 2:06*pm, Martin Brown
wrote:
On 27/05/2012 12:57, geoff wrote:





In message
, harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of days,
what prevents solar panels producing the full permitted 4KW. Down to 2KW
now.

A few days earlier, when not as hot, solar panels were producing 3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though.



White clouds reflect sunlight back into space. So there is less light
underneath.
Albedo effect.
Even thin cirrus causes output to fall by around 10%.

Mirrors would be dodgy unless you could remove them in fine weather.
The panels could overheat. They are not designed for it.
And they would need constant adjustment.

harry wrote:
On May 27, 1:48 pm, Adrian C wrote:
On 25/05/2012 19:00, harry wrote:





On May 25, 2:08 pm, "Dave Liquorice"
You only need to have a basic knowledge of photography to know that open
shade will give you 1/4 the light of full sun.
As will light cloud. Deep cloud reduces it anther 2-4 times, and you can
halve the output again within an hour of sunset.
But basic knowledge isn't your strong point, is it harry?
But it's not simply the amount of light being reduced the panels are
series connected and a shaded one reduces the terminal voltage and
possibly increases the source impedance so the panels that are fully
illuminated can't deliver their energy to the invertor.
--
Cheers
Dave.- Hide quoted text -
- Show quoted text -
He doesn't understand such things Dave. You can't educate pork.
What Dave has written has obviously sailed over your head.

Are your sPiV-priced panels series connected?

--
Adrian C- Hide quoted text -

- Show quoted text -

Yes they virtually always are on a small domestic installation. The
idea is to get the Vopen circuit as close to the max operating voltage
of the inverter as possible. This prolongs the running hours, hence
power generated..
It has to shut down when the DC output voltage falls to AC peak value
(ie around 350v)

There's no technical reason for that. It could be made to work on, say,
a minimum 55V input with the right design of inverter, for not much
penalty in the cost of the DC wiring, using the normal 4kW panel array
in a series/ parallel arrangement.

--
Tciao for Now!

John.

In message
,
harry writes
On May 27, 2:06*pm, Martin Brown
wrote:
On 27/05/2012 12:57, geoff wrote:





In message
, harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of days,
what prevents solar panels producing the full permitted 4KW. Down to 2KW
now.

A few days earlier, when not as hot, solar panels were producing 3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though.



White clouds reflect sunlight back into space. So there is less light
underneath.
Albedo effect.
Even thin cirrus causes output to fall by around 10%.

Mirrors would be dodgy unless you could remove them in fine weather.
The panels could overheat. They are not designed for it.
And they would need constant adjustment.

So what makes the sky appear blue, harry ?



--
geoff

"harry" wrote in message
...
On May 27, 2:06 pm, Martin Brown
wrote:
On 27/05/2012 12:57, geoff wrote:





In message
,
harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of
days,
what prevents solar panels producing the full permitted 4KW. Down to
2KW
now.

A few days earlier, when not as hot, solar panels were producing
3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though.

White clouds reflect sunlight back into space. So there is less
lightunderneath.

Not with the white clouds that arent in the path between the sun and the PV
panel.

Albedo effect.
Even thin cirrus causes output to fall by around 10%.

Not with the cirrus that arent in the path between the sun and the PV panel.

Mirrors would be dodgy unless you could remove them in fine weather.

Even sillier.

The panels could overheat. They are not designed for it.

So you design them for that, stupid.

And they would need constant adjustment.

Not if you just want better than no mirror results.

On May 27, 6:06*pm, geoff wrote:
In message
,
harry writes





On May 27, 2:06*pm, Martin Brown
wrote:
On 27/05/2012 12:57, geoff wrote:

In message
, harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past couple of days,
what prevents solar panels producing the full permitted 4KW. Down to 2KW
now.

A few days earlier, when not as hot, solar panels were producing 3..73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though..

White clouds reflect sunlight back into space. So there is less light
underneath.
Albedo effect.
Even thin cirrus causes output to fall by around 10%.

Mirrors would be dodgy unless you could remove them in fine weather.
The panels could overheat. They are not designed for it.
And they would need constant adjustment.

So what makes the sky appear blue, harry ?

--
geoff- Hide quoted text -

- Show quoted text -

Pointless asking stupid questions on the internet since everything
canbe discovered.
http://en.wikipedia.org/wiki/Sky

In message
,
harry writes
On May 27, 6:06*pm, geoff wrote:
In message
,
harry writes





On May 27, 2:06*pm, Martin Brown
wrote:
On 27/05/2012 12:57, geoff wrote:

In message
, harry
writes
On May 24, 11:42 pm, "the_constructor"
wrote:
House fitted with 4KW of solar panels

In brilliant sunshine, such as we have had over the past
couple of days,
what prevents solar panels producing the full permitted 4KW.
Down to 2KW
now.

A few days earlier, when not as hot, solar panels were
producing 3.73KW.

Kindest regards,

Jim G

Though we have sunshine it is not "brilliant". To get the full
output, the sky need to be intensely blue,

Harry - do you understand what makes the sky blue?

And he is factually wrong to boot. To get absolutely maximum output from
a solar array requires a clear blue sky path to the sun and the largest
amount of thin white cirrus cloud everywhere else. Enough to scatter
light that was destined to hit somewhere else onto your PV.

White clouds are *brighter* than blue sky in every universe but Harry's.

If you have the option since mirrors are cheap and solar PV device
expensive a 120 degree mirror assembly \_/ either side of the active
cells gives you about twice the output (but not flat plate). Tends to
get the PV cells a bit too warm and makes clear epoxy go yellow though.

White clouds reflect sunlight back into space. So there is less light
underneath.
Albedo effect.
Even thin cirrus causes output to fall by around 10%.

Mirrors would be dodgy unless you could remove them in fine weather.
The panels could overheat. They are not designed for it.
And they would need constant adjustment.

So what makes the sky appear blue, harry ?

--
geoff- Hide quoted text -

- Show quoted text -

Pointless asking stupid questions on the internet since everything
canbe discovered.
http://en.wikipedia.org/wiki/Sky

Its not a stupid question, it was a valid question relating to your
stupid statement and you obviopusly didn't know the answer before you
made it

you're a prize bellend ...



--
geoff