Free solar panel discussion

Cardew

Perry525 wrote: »

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Way back at the beginning of this thread a chap was writing about Australia, commenting that he has a 1kw array and that his best was around 1600kwh on a clear day with a temperature of 29 degrees C.

A 4kwh system in Falmouth will generate 5301kwh per day during July and on average 3399kwh over the year.
That's 50 5'37N
5 8'35W

Herein lies the danger with terminology - if it is not exact; which was the purpose of my first post.

The guy in Australia might have generated 1.6kW(1600watts) power - not 1600kWh from a 1kWp array.

A 4kWp system(not 4kWh) in Falmouth will not generate 5301kWh per day in July. However it will generate a lot more than 5.301kWh in a day - Fundire in North Lincs is generating 13kWh to 14kWh a day with a similar sized system.

In fact 3399kWh for a 4kWp system in a year for Falmouth seems on the low side to me, unless the array is less than perfectly sited.

Sorry to be pedantic but unless the correct terminology

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!!

albyota

Be a lot easier if we just used the 'unit' as the measurement, 1000 watt/hr = 1 kWh = 1 'unit' of electricity!

for example......."My 2.5kWp array generated 11 units...14 units....20 units today. over the year it has yielded 2,100 units hence the kWp averaged over a year, 2,100 x 41.3pence = £867.30p FIT or fifty quid off your leccy bill if you rent out your roof. Cardew, can you check my terminology and sums please?

eidolona

albyota wrote: »

I'm doing this to save you from the wolves on here......:eek:

solar air heating?...... from the sun?...... in the UK?.....in our summers....just when we don't need heating. passive solar heating with the large cardboard box full of black cans blocking out the sun shining through the window, making the room darker ...needing to put a light on? I thought this thread was about free solar PV panels generating electricity to pump into the national grid which in time....a long time.... could reduce CO2 emmissions, and give a free bit of leccy and/or FIT payment.

now then...who's been eating my porridge?

I ain't afraid of no wolves man . I eat 'em for brecky.

No one in their right mind would plaster PV panels on their roof even free ones and in order to make a profit. In claiming the FIT, they would simply be living at other people's expense. Its a nonsense. The benefit to the environment would be negligible and the scheme will simply polarize the country into those who have the panels and those who don't have the panels but who are paying for those who do. Shouldn't we be bringing people together? United we stand, divided we fall and all that?

I don't just want to be negative so the beer can solar air heater is an alternative. You fix it to your south facing wall and it heats the air during the autumn and winter months when the sun is out. Don't take my word for it or listen to the bone head above, check it out for yourself on You Tube.

quoia

Why do you keep spouting this nonsense ?

digitaltoast wrote: »

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You should also be aware that your roof is locked in. If some new technology 10x as efficient comes in in 5 years, you're still stuck with 16% efficient panels for the next 20 years.

NO IT'S NOT ! I've already responded to this statement telling you that it isn't true if you go with HOMESUN

quoia wrote: »

digitaltoast wrote: »

Well, it IS kind of relevant - people are talking about making a decision that involves handing over their roof, and all rights to subsidies generated by it, to a third party for 25 years. In making that decision, they need to know enough facts to make a reasoned decision.

As many people about to take this big decision appear to be, er, "confused" about basic maths and physics, I think it's very much on topic.

I mean, we've got people on here saying they can use more power than the system generates and still see the meter turning backwards.

Would you rather have a thread just full of people going "go for it" or "bad idea" without giving the reasoning behind it?

NOT if you choose HOMESUN for the Free installation.

You can buy yourself out of the 25 year contract at anytime - "take-over" cost is worked out on a linear depreciation rate from day 1. (see my previous post re this)
You then get the FITs payments etc. just as though you'd had the system installed for yourself from day 1.

This buy-out isn't available with ASG or ISIS I understand

Cardew wrote: »

So you are presumably saying that seejayess in North Nottinghamshire stating he is getting 3.1kW from his 3.3kWp system and yakky58 in Hampshire getting 2.156kW from his 2.05kW system are (to use your words) telling 'outright lies'.

Do you not believe that the annual generated output of panels is between 750kWh to 950kWh per 1kWp? That ASG state that the minimum output from their 3.3kWp system is 2,800kWh pa (848kWh per 1kWp) is incorrect

digitaltoast posted this link for details of a system over a 2 year period

http://www.nef.org.uk/greencompany/active-pv-basics.htm

Once he had got his maths correct - this suggested you can expect a generated kWh of 2.15 per 1kWp (daily average)

That equates to 785kWh per year

Cardew

albyota wrote: »

Be a lot easier if we just used the 'unit' as the measurement, 1000 watt/hr = 1 kWh = 1 'unit' of electricity!

for example......."My 2.5kWp array generated 11 units...14 units....20 units today. over the year it has yielded 2,100 units hence the kWp averaged over a year, 2,100 x 41.3pence = £867.30p FIT or fifty quid off your leccy bill if you rent out your roof. Cardew, can you check my terminology and sums please?

In best schoolmaster mode and getting out my red pen!;)

kWp or kWh?

50 quid? assuming 50% of 2,100 units used in the house?

'quid' is awfully common! A couple of ponies sounds so much nicer.

albyota

Cardew wrote: »

In best schoolmaster mode and getting out my red pen!;)

kWp or kWh?

50 quid? assuming 50% of 2,100 units used in the house?

'quid' is awfully common! A couple of ponies sounds so much nicer.

kWp, kilowatt peak, meaning the total Rating of the array of panels fitted

50 to 80 of our GB pounds sterling, the amount of electricity saved from your bill if you rented the roof out to ASG et al

albyota

eidolona wrote: »

I ain't afraid of no wolves man . I eat 'em for brecky.

No one in their right mind would plaster PV panels on their roof even free ones and in order to make a profit. In claiming the FIT, they would simply be living at other people's expense. Its a nonsense. The benefit to the environment would be negligible and the scheme will simply polarize the country into those who have the panels and those who don't have the panels but who are paying for those who do. Shouldn't we be bringing people together? United we stand, divided we fall and all that?

I don't just want to be negative so the beer can solar air heater is an alternative. You fix it to your south facing wall and it heats the air during the autumn and winter months when the sun is out. Don't take my word for it or listen to the bone head above, check it out for yourself on You Tube.

A box of cans aint gonna stop the lights going out in 6 or 7 years, but you can carry on!!, people are fitting PV panels on their rooves, they are even coming to a local authority building near you soon.

This 'bone head' is therefore going to call in the wolves.........:wall:

quoia

FORGET YOUR ROOF - It's your WINDOWS I'm after

http://www.dailymail.co.uk/sciencetech/article-1301762/New-technology-turn-house-window-Britain-solar-panel.html

New technology that could turn every house window in Britain into a solar panel

Every window in Britain could potentially be turned into a solar power generator thanks to new technology developed by scientists.
The new solar cell technology for harnessing green energy could revolutionise the power industry - and could be available within about five years.
Norwegian company EnSol AS has created the unique patented film which they hope could be released commercially by 2016.

Team leader Professor Chris Binns said: 'One of the key advantages is that it is a transparent thin film that can be coated onto window glass so that windows in buildings can also become power generators.
'Conversely the structural material of the building can also be coated. This could be side panels of the building itself or even in the form of 'clip-together' solar roof tiles.'
Professor Binns, of Leicester University, said: 'The material has been designed by EnSol AS and is based on nano-particles that can be synthesised in Leicester.
'In fact, following some initial investment by the company, the equipment we have here is uniquely suited to produce small amounts of the material for prototypes.
'The work is important since the solar cells are based on a new operating principle. Obviously some light has to be absorbed in order to generate power but the windows would just have a slight tinting.
'Also since it is a thin film that can be coated onto large areas it could become very much cheaper than conventional devices.
'The coating would be built into the windows or other materials as part of the manufacturing process.
'It could even be used on the roofs of cars to charge up batteries - although powering the vehicles themselves would probably be pushing it.'
The material is composed of metal nanoparticles embedded in a transparent composite matrix.
A spokesperson for EnSol AS said: 'The basic cell concept has been demonstrated and it will be the objective of this research and development project to systematically refine this technology to achieve a cell efficiency of 20 per cent or greater.
'A thin film deposition system with nano-particle source will be designed and constructed in collaboration with the University of Leicester for the fabrication of prototype cells based on this design.
'EnSol's next generation cell technology has tremendous potential for industrial scale, low environmental impact, cost effective production via standard 'spray on' techniques.

sassy_one

Warning to all readers.

I seriously dis advise against this offer, there is no such thing as a free meal!

I would not recommend any one takes the offer up personally.

Please see the national warning:

http://www.guardian.co.uk/environment/2010/aug/09/solar-photovoltaic-panels-homes

DO NOT SIGN UP

AVOID

sassy_one

Solar is currently the most expensive form of renewable electricity per unit of energy produced