Solar Panels Quote

tunnel

lovetowinacar wrote: »

Hello, we have had a person out to do a survey. He suggested 10 panels producing 2.5 on the roof - which would have some shading for part of the day. The cost he quoted was £9,800. We were contacted a few days later to say they could do 12 panels - 3 KW? and this would be approx £8000. He did say we could get them cheaper but many installers were not regulated or offer full guarantees etc.

Was that a quote for solar panels or was it quote for double glazing, cos it certainly sounds like a DG salesman to me.


Do your self a favour, post your rough location then some kind person may be able to recommend a local installer for you. Believe me, at £8k you could near enough buy one system get one free(excuse the pun). That there is bordering on unscrupulous!!

Martyn1981

tunnel wrote: »

Believe me, at £8k you could near enough buy one system get one free(excuse the pun). That there is bordering on unscrupulous!!

Hiya T. Thinking about it, with so many people recently getting 4kWp systems for about £5k, I reckon £4k for a 3kWp on a bungalow is a very fair figure, not rock bottom, so you're right, £8k is a BOGOF in more ways than one!

Mart.

tunnel

Martyn1981 wrote: »

Hiya T. Thinking about it, with so many people recently getting 4kWp systems for about £5k, I reckon £4k for a 3kWp on a bungalow is a very fair figure, not rock bottom, so you're right, £8k is a BOGOF in more ways than one!

Mart.

That was only tongue in cheek humour but I guess the DG salesman...sorry I meant pv salesman would be charging extra because of shading, you know..for the micro inverters or solaredge, them bits of kit they like to spout about and charge many multiples for.
I really wish the industry could get cleaned up a bit, there's far too many dodgy salesman preying on the unknowing.

lovetowinacar

Hi

Our location is in North Devon. I don't want to put actual location since lots of people can see these posts.

He said the roof would be ok for 12 with 10 on one of the roof sides and the other 2 on the side bit with less sun. This would equate to 3kw system.

Many thanks for all your comments/suggestions

Martyn1981

lovetowinacar wrote: »

Hi

Our location is in North Devon. I don't want to put actual location since lots of people can see these posts.

He said the roof would be ok for 12 with 10 on one of the roof sides and the other 2 on the side bit with less sun. This would equate to 3kw system.

Many thanks for all your comments/suggestions

Hiya.

Good location for generation.

What are the orientations of your rooves? Is there any reason why only 2 panels can go on the not so good roof? Does that one have the dormer? If that roof can take more panels, then probably/possibly cost effective to go up to 16 panels.

If only 2 panels, then you'll have trouble finding an inverter that can cope, so you'll probably need micro-inverters (one on each panel) or a SolarEdge (SE) system, with a central inverter, but POs (power optimisers) on each panel. I've got a SE system on my WNW roof, it's excellent.

The problem with micros and PO's is access if anything goes wrong, but not really a concern for a bungalow.

It'll be interesting to work out/talk about numbers, if you can post roof orientation and pitch. If there is only room for 2 panels on that other roof, then it might be simpler just to concentrate on the better roof. There are higher efficiency panels that are smaller/kWp so you can squeeze more kWp on, but they cost more. Probably worth thinking about though.

Mart.

lovetowinacar

I hope this helps:

Size of proposed system 3kWp

1010 is the solar radiation system is expected to get

6 is the number given for the SF shade factor (6 cells affected by some degree of shading sometime during the daytime)

Installation data:

Orientation of the PV system - degrees from South = 20 degrees

Inclination of system - degrees from horizontal = 45 degrees

Postcode region = 4

The roof set up was due to size of roof with the front section being able to take 10 panels and the dormer section taking 2 panels

Martyn1981

OK, popped your info into PVGIS and based on you living in Great Torrington (just picked a place in the north) and a roof of -20 (SSE), since +20 SSW should be the same, that gave a generation figure for a 2.5kWp system of 2,360kWh per year.

Income:
FiT 2,360 * 13.88p = £328
Export 50% deemed 1,180 * 4.77p = £56
Leccy savings guess (£80 to £160) = £120

Total £504 pa

Not bad if you can get it installed for £4k or less.

I usually encourage the use of all available roof space, and non south rooves (is yours 20d from North?) is ok, if part of a larger install. But, I'm not sure if messing about with 2 panels is worth it, especially if you have to go with a more complex inverter system. Also northern panels suffer with steep rooves.

If you are willing to pay more for higher efficiency panels, you might squeeze 3kWp onto that southern roof, and I'd still guess that £4k might be possible since there will be little to no scaffolding costs. At 3kWp the generation/income would increase by approx 20%.

Mart.

tunnel

Martyn1981 wrote: »

If you are willing to pay more for higher efficiency panels, you might squeeze 3kWp onto that southern roof, and I'd still guess that £4k might be possible since there will be little to no scaffolding costs. At 3kWp the generation/income would increase by approx 20%.

Mart.

Are you forgetting about the 327W benQ's Mart? 10 of those is 3.27kWp.
Not 100% sure about the 6 cells part, is that 6 panels or parts of a panel? If its panels then they should def be looking at solaredge or micros to iron out the shading issues.


ps, I'm with you on forgetting the 2 other panels

EricMears

You might be able to put 10 panels on the roof and another 6 on (say) the roof of a garden shed (and if there isn't a garden shed but you do have room it would be possible to build one.

Woofwoof

Hello Minrich

We are just starting the search, also in IP5. Which company did you use in the end (I think you stated the panel type, sorry if you said the company and I missed it)?

Has the job been completed, and if so, how did the installation process go?

I'll start a new thread for our queries as we go along.