Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some quotes

[exon16m]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

much above that the finances dont make the investment pay with the new FIT.

What would you quote?

 

[SolarCity]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

It depends on a lot of factors.

The structure and condition of the roof, the asbestos survey, the height of the building, the cable supplying the buildings, the use of the building (for reasons of working safely with asbestos) etc.

Installing on a corrugated cement roof is very, very time consuming and extra safety measures are required - especially so if the roof is found to have asbestos content.

Are you planning on installing two systems at the 21p per kWh FiT rate? If so, I very much doubt that you'll get the full rate for both systems.

 

[Earthstore]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

Ok, there are lots of ifs here, but using the SAP formula for a 4KWP system, if you have the perfect roof, if you have the perfect orientation, and if your system produces the amount calculated by SAP (although they can be 20% over depending on location in the UK, quality of install etc)
For a system cost of £8400 total, would save you £997.46, (Fit payment@21p, 50% deemed export, and 50% generated saved from your electricity bill @13p per unit)
Which gives you a return in year 1 of 11.9% index linked and tax free.

Of course that is for the perfect roof, which many are not.
Many people throughout the UK are seeing these types of returns, some are even better, but others do not believe it is possible.
So there you have it
I hope this helps.

 

[Gavin A]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

what age is the corrugated cement roof?

after 1999 and it would have been illegal for it to have been asbestos, fairly unlikely post 93.

If it's not asbestos then the main issue for me would become whether the roof was classed as a fragile surface or not - some corrogated fibreboard roofs aren't, many should be. If it is then it's going to need protective measures for the staff working on it such as nets. If it's not, then it shouldn't be more expensive than domestic really unless the electrics supply needs serious upgrading (which it often would, and could add hundreds or low thousands to the cost depending on distance and difficulty of digging the cable in).

 

[SolarCity]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

If it's not asbestos then the main issue for me would become whether the roof was classed as a fragile surface or not - some corrogated fibreboard roofs aren't, many should be. If it is then it's going to need protective measures for the staff working on it such as nets. If it's not, then it shouldn't be more expensive than domestic really unless the electrics supply needs serious upgrading (which it often would, and could add hundreds or low thousands to the cost depending on distance and difficulty of digging the cable in).

I'd always assumed that they all are?

 

[akaPABLO]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

8 grand for cheap panels

10 grand for sharp, this should be the going rate for a 4kWp system

earthing gas & water is extra charge as well as distance to travel, scaff inc in initial cost

its not worth putting a 4kWp system on a barn or 2 of them.



when you visit a barn try to pinch the roof material if it snaps clean then concrete and if it pulls away like its mixed with hair then its asbestos.

also asbestos is a dark grey colour compared to concrete which is the colour of a paving kerb.

 

[ktech]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

Don't quite figure how 2k adds to a Sharp system, thats 50 pence per watt premium. Either yuor buying Sharp at a very high price or you are getting very,very super cheap panels.

 

[akaPABLO]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

yes i buy at high prices

 

[exon16m]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

so someone explain me this...

Cheep versus expensive panel forgetting density of panel as space is not a problem. Inverter may be a different story.

They are all offering with a large insurance firm a guarantee that the at 10 they will offer 90% and at 25 80% of their first rated power. Surely on this basis a more budget panel is a no brain-er. Who is to say how much further the tec has advanced and the price has fallen. (from electronics industry history both are nearly guaranteed)

 

[Earthstore]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

All panels are tested under STC (standard test conditions), however some panels perform better in low light conditions, also when the panels heat up.

Some manufacturers use better quality cells, and also power match them, because if have one panel weaker that the others, this will drag the performance down.

One thing that all customers need to remember, they are buying a system that should last for 25 years, and the better it performs the more money you will make over the term.

Panels only make up part of the installation, if companies are very cheap, you need to question why.
Do they test asbestos by breaking a piece off and seeing if it has strands? As this type of roofing is called fibre cement the clue is in the name, and you can not tell by what colour it is....

I gave you my opinion on the roof, but by the sounds of things you are looking for the cheapest possible, I, and many others have seen "cheap", and it always comes with poor quality installs, and problems.

But, may I wish you luck.

 

[dansk]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

its like a car, they all go from a-b but which one is still going to be running smoothly in 25 years? the cheap one?

 

[ktech]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

All I can comment on is what we are doing: Big names but cost effective panels from manufacturers such as Yingi we are happy to sell. Poly panels not a problem on large roof areas / commercial installs. One thing that we have noticed is that manufacturers (and many do) that quote the +5 tollerance - quite often they quote each panel rating on the pallett and we have never seen this above 1% of STC. All the panels have a very similar rating so we see that these are sorted well in terms of performance. Last year all our commercial installs (mainly farms) insisted on German now they often don't even ask - although we still quote for what we regard as a quality panel these are generally Chineese. Interestingly customers still seem to not question the inverter that much. As this is a major component I always find this odd.
Last year the questions always asked was:
What is the efficiency - you can work this out yourself based on the dimensions and wattage of panel, lower efficiency are larger, again not a problem if roof space available
What is the tollerence - mentioned above although we always use positive tollerence
What is the warranty - not much in it from most manufacturers
What is the inverter start up voltage - quite often used to sell PowerOne over SMA - not much value in my opintion although PowerOne are a more cost effective inverter on the market.
A lot of the above questions that came from the customers, in my opinion, where due to previous 'sales' people clutching on headline figures (luckily not so many of these type about now).

However I do agree with EarthStone that the price only makes up part of the equation as installation quality is very important. We could knock out two 4kW installs in a day if we decided but always allow 1.5 days (generally). Quality matters a lot and also the fact that a fair price for a good quality job should also mean future contact with the installer is easy and they will be happy to answer any queries for you, rather than 'job done bye bye'.

 

[ktech]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

"its like a car, they all go from a-b but which one is still going to be running smoothly in 25 years? the cheap one?"
In relation to panels - who will know, i guess we will have to wait 25 years and see which does and which manufacturer is still about to warranty it?
Should you really take claims on datasheets on performance at face value?

 

[exon16m]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

"its like a car, they all go from a-b but which one is still going to be running smoothly in 25 years? the cheap one?"
In relation to panels - who will know, i guess we will have to wait 25 years and see which does and which manufacturer is still about to warranty it?
Should you really take claims on datasheets on performance at face value?

exactly my point but brand can be a poor way of telling this as can location of origin. Most of the insurance is by large insurance companies not the maker should be solid (but who knows in the current climate). I want a good system that is also a good value system.

 

[dansk]

Re: Barn installation needed 2x4kw on same roof ? asbesto in Sussex area need some qu

you get the jist, id put a fiver on a VW still running smoothly over a french car any day of the week. just like a good mid range panel, hyundai, LG, Bosch for example will in IMO be a safer 25 year bet then something un branded and un heard of.