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New PV System being considered - Page 2

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Posted by Eeyore on August 31, 2008, 7:40 am

Bruce Harvey wrote:

NOT for 1.5 kW 24/7 ! Then again the OP phrased his question hopelessly which
suggests he hasn't the tiniest clue how it all works.

One thing for sure, spending ANY money on PV in Northern England is doing bugger
all for the environment and making some people very wealthy.


Posted by Eeyore on August 30, 2008, 11:06 pm

Phil wrote:

Don't bother. The insolation there is rubbish.

That's about 900kWh / m2 annually. or averaged at ~ 2.5 kWh daily /m2

Multiply by the efficiency of a GOOD panel at 15% and ever sq metre of PV solar
panel will generate you a massive 375Wh daily. Furthermore of course, a lot less
in the winter.

Sp you'd need 4 sq metre panels just to get 1.5kWh for one hour ! To get an
average of 1.5kW throughout the day you would need 4 x 24 = ~ 100 sq metre
panels  and a collosal bank of battrweries, inverters and so on. I'd estimate
cost in the hundreds of thousands plus the batteries will need replacing every
10 years at best as they 'wear out'.

Rememeber PV omnly generates when the sun's shing and you won't get much on
cloudy days either.

And don't bother with those home wind turbines either, they're another con.

Fit CFLs in your light fittings and put a foot of insulation in your roof ! Fill
cavity walls with blown rockwool or the like. Double glazing funnilly enough is
quite low on the list of useful things to do.

Reducing USE is the thing to do. Insulation is your friend in summer and winter.

Some one has a BIG sense of humour. Let's see the details of this quote !

You won't have any.

See above. You might also want to see a phsychiatrist.


Posted by Mauried on August 31, 2008, 9:28 am
 On Sun, 31 Aug 2008 00:06:48 +0100, Eeyore

An interesting exercise for the OP would be to ask for an itemised
quote for the Solar System.
Ask questions like
How much for the panels.
How much for the Inverter.
How much to install it all.

If you actually get any figures for the above , then go and look up
the prices for the same items on the Net.

Ive done this several times just out of interests sake , and most
installers wont give you this info,and its pretty obvious why.
The install charges make up some 30% of the total cost.

Getting Solar panels installed is wimply making Installers very

Posted by bealiba on August 31, 2008, 1:06 pm
 On Aug 31, 7:28 pm, maur...@tpg.com.au (Mauried) wrote:

I'll tell you something as a designer and installer of systems, on a
typical system, the cost of the components alone at retail prices can
net the installer anything between $,000 to $0,000 straight up
profit. Then they have the gall to ask for a couple more K for the

Too many cowboys in the industry selling smoke and mirrors.

Posted by Eeyore on August 31, 2008, 9:08 pm

bealiba@gmail.com wrote:






enough is



I don't doubt it, thanks for your honesty.

The OP asked for a 1.5kW system in an area with 900kWh p.a. of insolation. He
state whether he meant it to peak at 1.5kW or whether we wanted an average 1.5
kW 24/7.
Bearing in mind that this is an area with very inclement weather and often
would you care to guesstimate the cost of such a system, with a line attached
that can feed any unused electricity back to the grid ?


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