From 4kW @ 10.2k to (hopefully) reasonable quotes!

silverwhistle

What is 'Tado saving @22%'? - some notional saving due to having a monitor?

I paid £6k 18 months ago for a 4kw installation on the South coast, plus an iboost at cost, so they're having you on, micro-inverters or not.

They didn't offer a better price if you signed up there and then, did they?;)

ChopperST

No way your diversion device will save you 50p a day!

tunnel

cool_techie wrote: »

Tunnel, I do think the same. Could you please help by being more specific if possible? Looking at the figures, i can see that the expected Energy cost increase is wildly high for a 20 year period. Anything specific you can point out please, which is ridiculous?

Regards,
S

Ok,
Post your direction of roof, angle and most importantly...is there any shading?
Being specific, unless you're in the house all day and are all electric? then £570 saved in first year is not doable, that's near enough saying you'll be using 100% of your generation...it's just not happening at all


Now..just answer the first 3 questions and we'll go from there.

Martyn1981

cool_techie wrote: »

Thanks everyone. Hengus, for year 1 it says - (Electrivity saved £570, Export £131, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £180, Tado saving @22% £110).

For year 2 it says - (Electrivity saved £650, Export £134, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £205, Tado saving @22% £125).
.
.
.
For year 20 it says - (Electrivity saved £6876, Export £209, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £2170, Tado saving @22% £1326).

Energy cost is baselined at £0.16 with a 14% pa increase. FiT is 0.1388, Export Tariff is 0.0477, FiTs increase RPI% 2.5 and Cell degradation is 0.60%.

Regards,
S

Wow. Nearly went to get some cornflakes, just so I could spit them out in shock!

Leccy savings of £500/£600. More like £80 to £160.

But ....... you don't mention FiTs income, and those leccy savings look suspiciously close to 4,000kWh @ 13.88p = £555? Though the export figures suggest a generation of 5,500kWh pa, which for 4kWp is closer to northern Spain targets than Milton Keynes.

I don't have a diversionary switch, but from reading comments on here (and elsewhere) it seems that £50 to £80 pa may be more sensible if displacing gas.

Energy costs can't rise 14% pa for 20 years, they simply can't. Doesn't matter what your views are on FF's, nuclear or renewables, but most are heading for around £100/MWh to generate. Add in some storage costs for intermittent generation, but you still hit a max. Worst case scenario, unsubsidised PV costing approx 9p/kWh to generate, plus storage at around 6-8p/kWh. If prices go too high, then the capital investment in PV becomes worthwhile. As would large scale wind generation with large scale storage, so there is a real end to price rises, after which only normal inflation would apply.

Mart.

cool_techie

tunnel wrote: »

Ok,
Post your direction of roof, angle and most importantly...is there any shading?
Being specific, unless you're in the house all day and are all electric? then £570 saved in first year is not doable, that's near enough saying you'll be using 100% of your generation...it's just not happening at all


Now..just answer the first 3 questions and we'll go from there.

Roof points SE @ 40 degrees, with no shading.

House is fully occupied evening & weekends only. Gas central heating & cooker.

Regards,
S

Martyn1981

cool_techie wrote: »

Roof points SE @ 40 degrees, with no shading.

House is fully occupied evening & weekends only. Gas central heating & cooker.

Regards,
S

That suggests generation of approx 3,700kWh, so just looking at the basic income streams:

FiT 3,700 * 13.88p = £513
Export 1,850 * 4.77p = £88
Leccy savings £120

Total £721pa. Not bad. :cool:

Mart.

tunnel

cool_techie wrote: »

Roof points SE @ 40 degrees, with no shading.

House is fully occupied evening & weekends only. Gas central heating & cooker.

Regards,
S

First of all, no need whatsoever for micros or anything similar. A simple 2 string panel set-up would suffice

Your probably looking around 3500-3700kWh a year generation from a 4kWp system(around £500 a year from FiTs + export(£85ish)


As Mart says, leccy use of £80-£120(no more if your not in during the day(unless you have iboost))


Pricewise you should be looking at anywhere between £4500 and £5500 dependant on the type of kit you put on your roof


I'm assuming you have a hot water tank because of the mention of iboost, you'll do well to get one to make the most of any spare generation you have that you won't use in the day(still all in for under £5.5k)


Forget Tado monitor, never heard of it, do a bit of reading instead on the forums and if you like the sound of monitoring then pick from one of the better known and trusted makes(still under £5500 with one thrown in)


Anymore questions then just ask


HTH


Tunnel


Edit, Noticed you have TP solar coming around. I believe they like to quote using "German" solarworld panels. Don't be pressured into buying them, there's plenty of alternatives on the market that work just as well that you don't have to pay a premium for

The_Green_Hornet

cool_techie wrote: »

Guys, Being in Milton Keynes, i have now contacted tpsolar to come around and provide a quote.

Please do let me know, if you know of any other reputable installers in the Milton Keynes area.

Thanks & Regards,
S

I have sent you a PM with details of an installer who covers the Milton Keynes area.

jimmyboy420

cool_techie wrote: »

jimmyboy420, do you mean, you paid approx. 9k last year?

Yes, but like I say, that included some structural roof work as well.

1961Nick

cool_techie wrote: »

Thanks everyone. Hengus, for year 1 it says - (Electrivity saved £570, Export £131, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £180, Tado saving @22% £110).

For year 2 it says - (Electrivity saved £650, Export £134, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £205, Tado saving @22% £125).
.
.
.
For year 20 it says - (Electrivity saved £6876, Export £209, [EMAIL="iboost@50p/day"]iboost@50p/day[/EMAIL] £2170, Tado saving @22% £1326).

Energy cost is baselined at £0.16 with a 14% pa increase. FiT is 0.1388, Export Tariff is 0.0477, FiTs increase RPI% 2.5 and Cell degradation is 0.60%.

Regards,
S

Those figures are a complete joke & I wouldn't trust a company that considered the above was an acceptable sales pitch.

Baseline 16p per kWh increasing at 14% pa for the next 20 years!:rotfl: