Solar quote

warrenb

Just got a quote for 12 Sunworld 250w panels Black on Black and sunplug inverter for a 3kw system for £6200. Seems a little high, but includes remote monitoring etc. Not sure how good the inverter or panels are.
Any advice ?

Martyn1981

Hiya, having trouble finding Sunworld, could they be Solarworld.

The inverter is a new one on me too, but the specs look decent, very light, and high efficiency, about 1% better than most.

Price is too high, for 3kWp, you want to aim for closer to £4k. Are you space limited, can you fit more panels, or go for 285Wp panels, or higher efficiency (more expensive panels) such as 327Wp?

Mart.

warrenb

Yes I did mean Solarworld, sorry. Did seem a little steep especially as I am on a ESE facing roof.
Getting a few more quotes now.

Martyn1981

warrenb wrote: »

Yes I did mean Solarworld, sorry. Did seem a little steep especially as I am on a ESE facing roof.
Getting a few more quotes now.

Do you also have a WNW roof? There are people daft enough to consider both (cough, see autosig, cough, cough!)

Mart.

warrenb

They wouldn't quote for the WNW, shading from trees and room only for about 4 panels. The panels seem very good quality and as you say the inverter is very good, but I shall get other quotes and try to knock them down a bit.

pw22

As Mart says, price is on the high side. If you post your rough location, then you might get recommendations for reasonable priced installers.

warrenb

I live in Tonbridge in Kent. I would really like to go with them but need to get the price down.

tunnel

warrenb wrote: »

I live in Tonbridge in Kent. I would really like to go with them but need to get the price down.

Do you really believe the company would be willing to drop to £4k to accommodate you, I don't if I'm honest, you need to get more quotes, you can get that price down but I doubt it will be with that company.

warrenb

Quote number 2 incoming, so will see what that says.

warrenb

Must be the area we live in but 3 more quotes and none under £5800 for a 4kw system.
Now I have done some maths and need to know if it makes sense
I have done this as all the companies who quoted have over estimated the production because even though I insisted my house is 75degrees off of South they have all quoted a SE aspect.

Been on PVIS and entered 4kw at -75 angle and generation should be 3470 a year.

So

3470*.1292 = 449 (FIT)
(3470/2)*.0485 = 84 (EXPORT)
Now most of our electricity is used during the day as I work at home. So assume a 50% on electric
(3470/2)*.14 = 242 (Electricity saving)

So total payment a year could be £775

Install cost is say £5800, that is a return of 13.36%

Is that right ?

Martyn1981

Hiya. Your numbers look correct, but be careful with that 50% assumption. Working from home will help, but there will be a lot of time when there's no washing or dishwasher to be done, you're generating 3kW and using 500W, so a lot of gen is being exported.

You may consume 50%, but it's a hard job. How much leccy do you consume each year? Higher users, will naturally save a bit more than low users.

Shame you can't get a better deal, but might be worth you taking things slow for a month and keep shopping. You may find a better deal, or one of the quoters may make a better offer, but as you've noticed, the returns are still high, even with the recent FiT rate drops.

Mart.